NumPy-Discussion December 2003

numpy-discussion@python.org

42 participants
61 discussions

TECH SECTOR - Technology Breakthrough - Patents Filed...elana

by Charlene Chapman

TECHNOLOGY SECTOR - TECHNOLOGY BREAKTHROUGH - PATENTS FILED Symbol: NMMG Market: OTC.BB Sector: L.E.D. TECHNOLOGY Barcharts Rate NMMG an 80% BUY - http://quotes.barchart.com/texpert.asp?sym=NMMG BREAKING NEWS in technology - New Millennium Media International (OTCBB: NMMG) announces that it has officially filed its patents---with over 50 claims---protecting its revolutionary technology, a breakthrough in (LED) architecture. The OnScreen LED Display Architecture is a radical new type of Bright LED video display architecture that is expected to revolutionize the 1.5 billion dollar LED display market. This breakthrough technology will give NMMG great potential to capture significant market share in the the 19 billion dollar outdoor advertising market. With all the new initiatives in Homeland Security and the Amber Alert, Intelligent Message Signs (IMS) are the future, and with the recent signing of new laws and federally mandated funds in the billions of dollars, NMMG and its patent-pending OnScreen technology is poised to lead the way. NMMG currently has the only technology that allows it to build onto exisiting infrastructure, i.e. road signs, billboards, etc. Imagine one day you are driving home on the freeway past a road sign you have seen a thousand times before--but this time you notice something different. This time you see a WARNING lit up--truck overturned 1 mile ahead--hazardous chemicals spilled. The sign advises you to exit immediately and to safety. Such a warning was broadcast instantly and using NMMG's OnScreen technology. You never noticed, as you drove by the roadside every day, that OnScreen was draped over the sign all this time. Now it has sprung into action by the punch of a button on a PC from a central station--instantly and just in the nick of time. You have just experienced OnScreen technology. And that is just one example. The possibilities are limitless. And because OnScreen can be applied to existing structures like road signs or billboards, its cost-effectiveness makes it far and away the technology choice. NMMG will unveil its breakthrough technology at the STRATEGIES IN LIGHT conference on February 2-4, 2004 at the San Mateo Marriott Hotel in San Mateo, California. This unique event is considered to be the premier annual forum for addressing commercial developments in high-brightness LEDs, as well as an unparalleled networking opportunity for suppliers and users of these devices. The growing interest in, and expanding attendance at, this event, reflects the excitement associated with a market that has grown by 50% since 2000, while other semiconductor and optical component industries have stagnated or experienced large declines. ON-SCREEN TECHNOLOGY OnScreen is expected to create a broad-range of products with much better resolution and brighter pictures than the current generation of displays. OnScreen will be visible in direct sunlight yet avoid many of the issues associated with current displays including sun-loading, wind-loading and excessive weight. In addition, the new LED architecture produces an advantage that is not available in today's marketplace: a more lightweight, pliable display that can fit any application. These are important advantages as the High Brightness LED market is expected to grow from 1.2 billion dollars in 2000 to 4 billion in 2006. In addition, according to Stanford Resources, the LED sign market value alone is expected to exceed 1 billion by 2006. These projections are made based on existing technology and do not take into account emerging technologies, such as OnScreen, that can rapidly alter the size and shape of this market. COMMERCIAL MARKET & STRATEGY NMMG's initial marketing strategy revolves around licensing intellectual property (IP) to worldwide manufacturers of LED display products and components. The LED sign market is projected to reach over 1 billion dollars by 2006. Lumiled's projects that high brightness LED's, used in LED signs alone, will exceed 1.2 billion by 2007. If these projections hold, the fully manufactured signs would represent a $5 billion market. Whichever number is accurate, they both point towards a robust market for these new LED displays. Many projections don't take into account emerging high growth applications such as the Amber Alert project, Homeland Security and roadway intelligent message transfer. THE MARKET An article in Media Post's Media Daily News in March of 2003 noted that the outdoor industry has successfully weathered the recession and that our large members say they're having a great first quarter in 2003. They go on to note that technology is expected to transform both the display and measurement of outdoor advertising. According to Media Daily the most exciting news is coming on the display side, where Lamar Advertising is converting their key boards to LED units whose messages can be changed at will and sold in day-parts by the hour or even the minute. They added that Clear Channel's backlit subway panels in stairwells are being converted to LED as well. Together these companies represent two of the three largest outdoor US advertisers. Recent Federal Government legislation has also placed a spotlight on expanding the Amber Alert network nationwide. The highly publicized success in locating a number of kidnapped children shortly after their abduction in California has now triggered federal funding for U.S.-wide expansion of these variable-message signs. Homeland Security issues have also increased the number of early warning signs being planned and funded as part of an overall information sharing network. Traffic safety is also becoming a much higher priority in the U.S.. It is estimated that just over 60,000 roadway dynamic message signs are in operation in the United States. In Japan alone there are over 1.5 million of these signs. The United States represents a huge growth market for LED displays. GROWTH OPPORTUNITES In addition to the outdoor television market, another interesting and exciting application for OnScreen arrays is artistic lighting in dramatic curved and shaped displays in places like Las Vegas, New York City or really virtually any venue. The tensile, flexible structure of OnScreen provides unlimited opportunity for creativity. The anticipated cost reductions of OnScreen will also provide ample opportunity for growth of the large-scale LED display market itself. OnScreen's unique architecture opens the door for new applications such as curved implementations, billboards on the sides of buildings where tenants can still see out, and lower cost mobile applications on the sides of existing vehicles. Homeland Security, Amber Alert variable message signage and instant message transfer applications can also benefit significantly from the advantages of OnScreen. Reduced wind-loading and weight can significantly lower the cost of the superstructures required to support these signs and also reduce the cost to install and maintain them. JUST LOOK WHO IS ALREADY ON BOARD New Millennium has established a Technology Breakthroughsentific Advisory Board comprised of leading experts in key categories in the research and marketing of LED technology. David Pelka, Ph.D.- Chairman Well known expert in physics, founded TIR Technologies Inc. to pursue patents for his LED lighting systems and LCD backlits. Dr. Pelka secured more than $2 million in venture capital and licensing for TIR before it was acquired by Teledyne Electronic Technologies (NYSE:TDY). Since the buyout, Dr. Pelka has served as Director of Product Development for Teledyne Lighting and Display Products. Dr. Pelka's accolades include fellowships and awards from the Smithsonian, National Defense, Northrop University and Ebell Fellowship, as well as countless articles published in both classified (the U.S. Air Force and Army) publications and various non-classified publications. He has founded several technology companies, which he successfully expanded by building strong revenue streams and securing venture capital investments and government contracts. Robert V. Steele, Ph.D. Director of Optoelectronics Programs and Chairman of the annual conference Strategies in Light for Strategies Unlimited. Steele is responsible for all of Strategies Unlimited's activities in the area of optoelectronic components, for which the 23-year-old market research firm has specialized in providing market research reports and consulting services. Co-author of Solid-State Lighting: New Growth Opportunities for High-Brightness LED's, Dr. Steele writes regularly for industry publications on high-brightness LED markets and applications such as Forbes, The Wall Street Journal, The Economist and more. John Biondo Owner and President of Silicon Robotics Corporation, which provides various product development services including electronic and electromechanical design, software development, optics, and project management. Biondo also has extensive patent-process experience. In 1980, Biondo launched Electric Filmworks, which produced computer-generated visual effects for the television and motion picture industry. He also designed an apparatus using newly available and inexpensive microcomputers, which allowed the company to compete successful against older, more established firms. To transfer from the service-sector into manufacturing, Biondo sold Electric Filmworks in 1989 and co-founded Amazing Photos. Amazing Photos designed, manufactured and sold a variety of innovative coin-operated photo booths. Polaroid Corporation licensed and marketed the two most popular and cost effective booths under their own name. Richard Reis, Ph.D. Executive Director of the Alliance for Innovative Manufacturing at Stanford and Director for Academic Partnerships in the Stanford Learning Laboratory. Dr. Reis' impressive career includes serving as; the Executive director of the Stanford Center for integrated Systems, a major research partnership between Stanford and 15 industrial companies; a Consulting Professor in both the Stanford University Electrical and Mechanical Engineering departments; professor of a year-round seminar that is part of the Stanford University Future Professors of Manufacturing program; a professor of astronomy at the College of San Mateo, Calif.; and a curriculum consultant at Menlo College, Calif. Ben Jacobson, Ph.D. Dr. Jacobson has worked on numerous impressive LED projects that have exponentially increased beam density and brightness and reduced system costs. Additionally, these projects have improved power requirements, heat load and LED count, while improving compactness, efficiency and performance over competitors' products. Dr. Jacobson was instrumental in positioning Illumitech as a new company developing high-performance LED lighting systems with thermal packaging. Dr. Jacobson has over a decade of experience developing and marketing new technology for the display industry, both in his previous positions and currently at Illumitech. Prior to Illumitech, Dr. Jacobson held various executive and research directorial positions at EG Controls Inc., ARCH Venture Partners, NiOptics Corporation and the University of Chicago. He has seven U.S. patents, and has published 13 research articles and seven conference presentations. Joseph D. Tajnai, Ph.D. Dr. Tajnai is a consultant in Optical Radiation Safety, LED's & Applications and Optics & Optical Measurement Training. He was an engineer, Technology Breakthroughsentist and technical manager for 23 years at Hewlett-Packard and Agilent Technologies. He has focused on fiber optic development, LED development and measurements, new product processes, mathematical modeling and international and US standards and regulations. He also worked with GE Sylvania for nine years and contributed heavily to their YAG laser development. Dr. Tajnai received his BS, MS and Ph.D. from California Institute of Technology in Electrical Engineering and Applied Physics. Please note that NMMG had absolutley nothing to do with this report and is not a participant in any way. No more advertisements: www.inet-notification.com/away.html Technology Breakthroughs is an independent research firm. This report is based on Technology Breakthroughs's independent analysis but also relies on information supplied by sources believed to be reliable. This report may not be the opinion of NMMG management. Technology Breakthroughs has also been retained to research and issue reports on NMMG. Technology Breakthroughs may from time to time purchase or sell NMMG common shares in the open market without notice. The information contained in this report shall not constitute, an offer to sell or solicitation of any offer to purchase any security. It is intended for information only. Some statements may contain so-called "forward-looking statements". Many factors could cause actual results to differ. Investors should consult with their Investment Advisor concerning NMMG. Copyright 2003 © Technology Breakthroughs. All Rights Reserved. Technology Breakthroughs was paid eight thousand dollars to distribute this report. Technology Breakthroughs is not affiiated with Technology Breakthroughs and is not responsible for newsletter content. All information in this report can be obtained on the world wide web at www.nmmimediacom. New Millenimum Media was not a participant in this newsletter in any way. x c g qkhy rby uisfrxp cm c

18 years, 1 month

Low cost quality conference calls llcocwlrwqsqb

by Cyril Johnston

18 years, 1 month

US STOCK MARKET - NMMG - After Hours NEWS...alegria

by Elvia Burt

US Stock Market - Stock Profile of the Week Symbol: NMMG Market: OTC.BB Sector: LED TECHNOLOGY Before we begin our profile we have very exciting after-market news... Monday December 15, 4:58 pm ET - New Millennium Media Engages Leading Product Commercialization Consulting Firm BREAKING NEWS - CLEARWATER, Fla.--(BUSINESS WIRE)--Dec. 15, 2003--New Millennium Media International Inc., (OTCBB: NMMG) announced today that they have engaged Global Works Consulting to assist with the product commercialization of their next generation light emitting diode (LED) video displays utilizing their proprietary OnScreen (TM) technology. With Dr. Shalom Flank as its Principal, Global Works has been working with local and national clients to commercialize leading-edge technology since 1999. Dr. Flank is an Associate with Haft, Harrison, and Wolfson, Inc., and also operates as a Principal of iPrime Group, a consortium of senior professional consultants. According to Steve Velte, NMMG's Director of Research & Development: "Dr. Flank has been working with technology for over 15 years as it goes from abstract innovation to successful implementation. He has been a strategy advisor to start-ups, universities, defense contractors, and investment funds, including AnswerLogic, DevelopmentSpace, GlobalWisdom, the University of Maryland, the Information Sciences Institute, Veridian Systems, and the Washington Square Capital Fund. His experience covers software applications and algorithms, including knowledge management, enterprise portals, bioinformatics, natural language processing, e-learning, and on-line travel. He has also worked with user interfaces and human factors, networked sensors, renewable energy, and defense technology. His unique expertise lies at the intersection of business and technology - understanding the potential, the pitfalls, and the path for creating utility and profit out of new technology." Before immersing himself in the entrepreneurial community in Washington, Dr. Flank directly managed over $60M of investment in advanced information technology projects as a Program Manager at the Defense Advanced Research Projects Agency (DARPA). Dr. Flank has also been visiting scientist at the Monterey Institute of International Studies, has served on the staff of Lawrence Livermore National Laboratory, Stanford University, and the U.S. House of Representatives, and has had appointments at Harvard and MIT. Dr. Flank earned a Ph.D. in a multi-disciplinary program at MIT, along with a Master of Science in Nuclear Engineering, and received a B.A. in Physics from Cornell University. STOCK PROFILE OF THE WEEK New Millennium Media International (OTCBB: NMMG) specializes in cutting-edge motion display advertising solutions. Their unique Advertising Display Boards and LED Digital Displays offer up a dynamic and cost efficient way to effectively market products and promote brand awareness. NMMG holds the exclusive United States and Canadian distribution rights to the patented, "IllumiSign EyeCatcher" Advertising Display Board. IllumiSign EyeCatcher, the exclusive marketing company for this product, has launched an aggressive national marketing campaign, targeted not only at advertisers, but business opportunity seekers as well. This advertising medium presents excellent benefits to advertisers and lucrative business opportunities to franchisees and corporate sponsors, alike. IllumiSign EyeCatcher has an inventive, profit sharing program in place called "Partners In Profit" (PIP), which is structured to provide revenue incentives for larger national corporations and venues to tap deeper into their market share by allowing placement of the board in their high traffic and Point of Sales areas. This program has the potential to generate millions of dollars in additional annual revenue for qualifying corporate sponsors, while providing the means for greater public exposure to the IllumiSign EyeCatcher Advertising Boards. NMMG has partnered with E-Vision LED, Inc., a US based company whose affiliates manufacture their state-of-the-art LED displays. This high technology media is the only truly effective way, television aside, for advertisers to display their products in true form. Their LED displays can operate any commercial format on any size board. This gives them a strong competitive advantage with regard to flexibility and ease of control, since the images are programmed and controlled right from their central office. ON-SCREEN TECHNOLOGY The OnScreen LED Display Architecture is a radical new type of Bright LED video display architecture that is expected to provide key design improvements in cost, weight and brightness of LED displays for such applications as billboards, large outdoor venue video screens and outdoor video advertising. Worldwide, the outdoor advertising market is approximately 19 billion dollars, with the US representing 5.2 billion in 2001, according to the Outdoor Advertising Association of America (OAAA). An increasing percentage of these expenditures are utilizing the technologies of motion display advertising- such as the OnScreen display technology. OnScreen is expected to create a broad-range of products with much better resolution and brighter pictures than the current generation of displays. OnScreen will be visible in direct sunlight yet avoid many of the issues associated with current displays including sun-loading, wind-loading and excessive weight. In addition, the new LED architecture produces an advantage that is not available in today's marketplace: a more lightweight, pliable display that can fit any application. These are important advantages as the High Brightness LED market is expected to grow from 1.2 billion dollars in 2000 to 4 billion in 2006. In addition, according to Stanford Resources, the LED sign market value alone is expected to exceed 1 billion by 2006. These projections are made based on existing technology and do not take into account emerging technologies, such as OnScreen, that can rapidly alter the size and shape of this market. COMMERCIAL MARKET & STRATEGY NMMG's initial marketing strategy revolves around licensing intellectual property (IP) to worldwide manufacturers of LED display products and components. The LED sign market is projected to reach over 1 billion dollars by 2006. Lumiled's projects that high brightness LED's, used in LED signs alone, will exceed 1.2 billion by 2007. If these projections hold, the fully manufactured signs would represent a $5 billion market. Whichever number is accurate, they both point towards a robust market for these new LED displays. Many projections don't take into account emerging high growth applications such as the Amber Alert project, Homeland Security and roadway intelligent message transfer. THE MARKET An article in Media Post's Media Daily News in March of 2003 noted that the outdoor industry has successfully weathered the recession and that our large members say they're having a great first quarter in 2003. They go on to note that technology is expected to transform both the display and measurement of outdoor advertising. According to Media Daily the most exciting news is coming on the display side, where Lamar Advertising is converting their key boards to LED units whose messages can be changed at will and sold in day-parts by the hour or even the minute. They added that Clear Channel's backlit subway panels in stairwells are being converted to LED as well. Together these companies represent two of the three largest outdoor US advertisers. Recent Federal Government legislation has also placed a spotlight on expanding the Amber Alert network nationwide. The highly publicized success in locating a number of kidnapped children shortly after their abduction in California has now triggered federal funding for U.S.-wide expansion of these variable-message signs. Homeland Security issues have also increased the number of early warning signs being planned and funded as part of an overall information sharing network. Traffic safety is also becoming a much higher priority in the U.S.. It is estimated that just over 60,000 roadway dynamic message signs are in operation in the United States. In Japan alone there are over 1.5 million of these signs. The United States represents a huge growth market for LED displays. GROWTH OPPORTUNITES In addition to the outdoor television market, another interesting and exciting application for OnScreen arrays is artistic lighting in dramatic curved and shaped displays in places like Las Vegas, New York City or really virtually any venue. The tensile, flexible structure of OnScreen provides unlimited opportunity for creativity. The anticipated cost reductions of OnScreen will also provide ample opportunity for growth of the large-scale LED display market itself. OnScreen's unique architecture opens the door for new applications such as curved implementations, billboards on the sides of buildings where tenants can still see out, and lower cost mobile applications on the sides of existing vehicles. Homeland Security, Amber Alert variable message signage and instant message transfer applications can also benefit significantly from the advantages of OnScreen. Reduced wind-loading and weight can significantly lower the cost of the superstructures required to support these signs and also reduce the cost to install and maintain them. Please note that NMMG had absolutley nothing to do with this report and is not a participant in any way. No more advertisements: www.inet-notification.com/away.html Stock Market Today is an independent research firm. This report is based on Stock Market Today's independent analysis but also relies on information supplied by sources believed to be reliable. This report may not be the opinion of NMMG management. Stock Market Today has also been retained to research and issue reports on NMMG. Stock Market Today may from time to time purchase or sell NMMG common shares in the open market without notice. The information contained in this report shall not constitute, an offer to sell or solicitation of any offer to purchase any security. It is intended for information only. Some statements may contain so-called "forward-looking statements". Many factors could cause actual results to differ. Investors should consult with their Investment Advisor concerning NMMG. Copyright 2003 © Stock Market Today. All Rights Reserved. This newsletter was distributed by SCI. SCI was paid five thousand dollars to distribute this report. SCI is not affiiated with Stock Market Today and is not responsible for newsletter content. All information in this report can be obtained on the world wide web at www.nmmimedia.com. New Millenimum Media was not a participant in this newsletter in any way. jgghnw bog

18 years, 1 month

RE: [Numpy-discussion] Any way to link numarray againstLAPACK/ATLAS?

by Nadav Horesh

I tested it and it probably works, since after recompiling numarray (0.8) the file lapack_lite2.so shrinked from 1300K to 94K. Running strace on a python script that inverse a matrix shows that it loads libblas and liblapack. Thank you for your help, Nadav. -----Original Message----- From: Todd Miller [mailto:jmiller@stsci.edu] Sent: Tue 16-Dec-03 15:31 To: Nadav Horesh Cc: numpy-discussion Subject: Re: [Numpy-discussion] Any way to link numarray againstLAPACK/ATLAS? I haven't tried this, but the "theory" is that you can set the USE_LAPACK environment variable to 1 and it will switch to an alternate link pattern in the (top level) file addons.py. Regards, Todd On Tue, 2003-12-16 at 04:17, Nadav Horesh wrote: > It seems that section 13.1.1 (Installation using LAPACK) is not valid > any more --- is there another way? > > Nadav. > > > > ------------------------------------------------------- > This SF.net email is sponsored by: SF.net Giveback Program. > Does SourceForge.net help you be more productive? Does it > help you create better code? SHARE THE LOVE, and help us help > YOU! Click Here: http://sourceforge.net/donate/ > _______________________________________________ > Numpy-discussion mailing list > Numpy-discussion(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/numpy-discussion -- Todd Miller Space Telescope Science Institute 3700 San Martin Drive Baltimore MD, 21030 (410) 338 - 4576

18 years, 1 month

Any way to link numarray against LAPACK/ATLAS?

by Nadav Horesh

It seems that section 13.1.1 (Installation using LAPACK) is not valid any more --- is there another way? Nadav.

18 years, 1 month

Conversion from Numeric to numarray

by Francesc Alted

Hi, Conversion between Numeric arrays and numarray fails for zero-sized Numeric arrays: >>> numarray.array(Numeric.zeros((0,), 'd')) Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.3/site-packages/numarray/numarraycore.py", line 301, in array raise ValueError("Unknown input type") ValueError: Unknown input type but this works: >>> numarray.array(Numeric.zeros((1,), 'd')) array([ 0.]) I'm wondering if it would be better to log a bug of the SF project site for such a no too grave bugs rather than report them to the list, although it seems to me that people only logs Numeric reports on the SF project. Would it be correct using the same place for numarray reports as well? Cheers, -- Francesc Alted

18 years, 1 month

Re: [Numpy-discussion] Convolve returning zero array

by R.Jager＠mapperlithography.com

18 years, 1 month

Re: [Numpy-discussion] Convolve returning zero array

by R.Jager＠mapperlithography.com

OK, here is the example: [code] from numarray import * import numarray.convolve as conv lx=20 center=10 index=arange(lx,type='Float64') data1=(abs(center-index))<3 print 'The binary pattern:' print data1 PSF=5 xwidth=18 xmid=xwidth/2 sigma=PSF/(sqrt(8*log(2))) index=arange(xwidth,type='Float64') ShortGauss = (1/(sqrt(2*pi)*sigma)) * exp(-0.5*((index-xmid)/sigma)*((index-xmid)/sigma)) print '\nThe short gauss:' print ShortGauss image=conv.convolve(data1,ShortGauss,mode=conv.SAME) print '\nThe convolution of the binary pattern with the short gauss:' print image PSF=5 xwidth=22 xmid=xwidth/2 sigma=PSF/(sqrt(8*log(2))) index=arange(xwidth,type='Float64') LongGauss = (1/(sqrt(2*pi)*sigma)) * exp(-0.5*((index-xmid)/sigma)*((index-xmid)/sigma)) print '\nThe long gauss:' print LongGauss image=conv.convolve(data1,LongGauss,mode=conv.SAME) print '\nThe convolution of the binary pattern with the long gauss:' print image [\code] When I run this code, the first convolution gives an array of zeros, the second convolution is good. I also did a quick try with convolve from nd_image, but this function was slower than the convolve from numarray with a large Gaussian distribution. Remco Jager MAPPER Lithography Lorentzweg 1 2628 CJ Delft, The Netherlands tel.: +31 (0)15 2789439 fax: +31 (0)15-2789473 http://www.mapperlithography.com This e-mail, attachments and (any part of) its content are (i) intended for the named addressee(s) only and (ii) strictly confidential and proprietary. All rights are reserved by MAPPER Lithography. Any unauthorized use, disclosure and/or copying are strictly prohibited, except with prior and express written permission by MAPPER Lithography. Should you have received this e-mail, attachments and its content by mistake, please bring this to our attention and destroy this e-mail and attachments in full. Thank you. |---------+----------------------------> | | Nadav Horesh | | | <nadavh@visionsen| | | se.com> | | | | | | 15/12/2003 14:13 | | | | |---------+----------------------------> >------------------------------------------------------------------------------------------------------------------------------| | | | To: R.Jager(a)mapperlithography.com | | cc: Peter Verveer <verveer(a)embl-heidelberg.de>, numpy-discussion(a)lists.sourceforge.net | | Subject: Re: [Numpy-discussion] Convolve returning zero array | >------------------------------------------------------------------------------------------------------------------------------| 1. Can you post an example? 2. Whenever convolution runs slow because the arrays are large, use FFT (with a proper padding) --- it can be an order of magnitude (or more) faster. Nadav. R.Jager(a)mapperlithography.com wrote: > Hi Peter, > > At first I used numarray 0.6. This morning I have installed 0.8 but the > results are the same. I will try the convolve functions in the nd_image > package. > > Thanks, > > Remco Jager > > MAPPER Lithography > Lorentzweg 1 > 2628 CJ Delft, The Netherlands > tel.: +31 (0)15 2789439 > fax: +31 (0)15-2789473 > http://www.mapperlithography.com > > This e-mail, attachments and (any part of) its content are (i) intended for > the named addressee(s) only and (ii) strictly confidential and proprietary. > All rights are reserved by MAPPER Lithography. Any unauthorized use, > disclosure and/or copying are strictly prohibited, except with prior and > express written permission by MAPPER Lithography. Should you have received > this e-mail, attachments and its content by mistake, please bring this to > our attention and destroy this e-mail and attachments in full. Thank you. > > > |---------+----------------------------> > | | Peter Verveer | > | | <verveer@embl-hei| > | | delberg.de> | > | | | > | | 15/12/2003 12:04 | > | | | > |---------+----------------------------> > >------------------------------------------------------------------------------------------------------------------------------| > | | > | To: R.Jager(a)mapperlithography.com, numpy-discussion(a)lists.sourceforge.net | > | cc: | > | Subject: Re: [Numpy-discussion] Convolve returning zero array | > >------------------------------------------------------------------------------------------------------------------------------| > > > > > Hi Remco, > > Sounds like a bug. Which version of numarray do you use? Version 0.8 of > numarray should have appeared on sourceforge now. If the convolve in that > version does still not work, you could try out the convolution function in > the new nd_image package that is part of numarray 0.8. If that does not > work, > let me know since I am the author of that package, and will fix problems > with > it. > > Cheers, Peter > > On Monday 15 December 2003 11:24, R.Jager(a)mapperlithography.com wrote: > >>Hi list, >> >>I already posted this on the numarray forum on freshmeat, but Jay T > > Miller > >>advised me to post my problem to this list. OK, now for the problem: I > > try > >>to convolve a Gaussian distribution with a binary pattern. For small > > values > >>of the sigma of the Gaussian distribution the convolution returns an > > array > >>of zeros. For a large value the results are OK. >>I did some more research and found out that the zero array is returned if >>the length of the Gaussian is smaller than the length of the binary >>pattern. In the function call the Gaussian is the kernel and the binary >>pattern is the data. The convolution mode is 'SAME'. I have swapped the >>data and kernel in the convolve function call, but this has no influence > > on > >>the result, as this is swapped again in convolve.py. A quick and dirty >>workaround is to always make the Gaussian distribution longer than the >>binary pattern, but for very large binary patterns this increases the >>calculation time significantly. Does anyone have an idea how to solve > > this > >>properly? >> >>Met vriendelijke groeten, >> >>Remco Jager >> >>MAPPER Lithography >>Lorentzweg 1 >>2628 CJ Delft, The Netherlands >>tel.: +31 (0)15 2789439 >>fax: +31 (0)15-2789473 >>http://www.mapperlithography.com >> >>This e-mail, attachments and (any part of) its content are (i) intended > > for > >>the named addressee(s) only and (ii) strictly confidential and > > proprietary. > >>All rights are reserved by MAPPER Lithography. Any unauthorized use, >>disclosure and/or copying are strictly prohibited, except with prior and >>express written permission by MAPPER Lithography. Should you have > > received > >>this e-mail, attachments and its content by mistake, please bring this to >>our attention and destroy this e-mail and attachments in full. Thank you. >> >> >> >> >> >> >>------------------------------------------------------- >>This SF.net email is sponsored by: SF.net Giveback Program. >>Does SourceForge.net help you be more productive? Does it >>help you create better code? SHARE THE LOVE, and help us help >>YOU! Click Here: http://sourceforge.net/donate/ >>_______________________________________________ >>Numpy-discussion mailing list >>Numpy-discussion(a)lists.sourceforge.net >>https://lists.sourceforge.net/lists/listinfo/numpy-discussion > > > -- > Dr. Peter J. Verveer > Cell Biology and Cell Biophysics Programme > European Molecular Biology Laboratory > Meyerhofstrasse 1 > D-69117 Heidelberg > Germany > Tel. : +49 6221 387245 > Fax : +49 6221 387306 > > > > > > > > > > > ------------------------------------------------------- > This SF.net email is sponsored by: SF.net Giveback Program. > Does SourceForge.net help you be more productive? Does it > help you create better code? SHARE THE LOVE, and help us help > YOU! Click Here: http://sourceforge.net/donate/ > _______________________________________________ > Numpy-discussion mailing list > Numpy-discussion(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/numpy-discussion >

18 years, 1 month

Non-regular input detection for chararrays

by Francesc Alted

Hi, NumArray class seems to detect invalid sequences, but not in CharArray: >>> array([3, [4, 5.2]]) Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.3/site-packages/numarray/numarraycore.py", line 286, in array return fromlist(sequence, type, shape) File "/usr/local/lib/python2.3/site-packages/numarray/numarraycore.py", line 195, in fromlist arr.fromlist(seq) libnumarray.error: setArrayFromSequence: invalid sequence. >>> strings.array(["aaa", ["bbb", "ccc"]]) CharArray(['aaa', 'bbb']) -- Francesc Alted

18 years, 1 month

Re: [Numpy-discussion] Convolve returning zero array

by R.Jager＠mapperlithography.com

Hi Peter, At first I used numarray 0.6. This morning I have installed 0.8 but the results are the same. I will try the convolve functions in the nd_image package. Thanks, Remco Jager MAPPER Lithography Lorentzweg 1 2628 CJ Delft, The Netherlands tel.: +31 (0)15 2789439 fax: +31 (0)15-2789473 http://www.mapperlithography.com This e-mail, attachments and (any part of) its content are (i) intended for the named addressee(s) only and (ii) strictly confidential and proprietary. All rights are reserved by MAPPER Lithography. Any unauthorized use, disclosure and/or copying are strictly prohibited, except with prior and express written permission by MAPPER Lithography. Should you have received this e-mail, attachments and its content by mistake, please bring this to our attention and destroy this e-mail and attachments in full. Thank you. |---------+----------------------------> | | Peter Verveer | | | <verveer@embl-hei| | | delberg.de> | | | | | | 15/12/2003 12:04 | | | | |---------+----------------------------> >------------------------------------------------------------------------------------------------------------------------------| | | | To: R.Jager(a)mapperlithography.com, numpy-discussion(a)lists.sourceforge.net | | cc: | | Subject: Re: [Numpy-discussion] Convolve returning zero array | >------------------------------------------------------------------------------------------------------------------------------| Hi Remco, Sounds like a bug. Which version of numarray do you use? Version 0.8 of numarray should have appeared on sourceforge now. If the convolve in that version does still not work, you could try out the convolution function in the new nd_image package that is part of numarray 0.8. If that does not work, let me know since I am the author of that package, and will fix problems with it. Cheers, Peter On Monday 15 December 2003 11:24, R.Jager(a)mapperlithography.com wrote: > Hi list, > > I already posted this on the numarray forum on freshmeat, but Jay T Miller > advised me to post my problem to this list. OK, now for the problem: I try > to convolve a Gaussian distribution with a binary pattern. For small values > of the sigma of the Gaussian distribution the convolution returns an array > of zeros. For a large value the results are OK. > I did some more research and found out that the zero array is returned if > the length of the Gaussian is smaller than the length of the binary > pattern. In the function call the Gaussian is the kernel and the binary > pattern is the data. The convolution mode is 'SAME'. I have swapped the > data and kernel in the convolve function call, but this has no influence on > the result, as this is swapped again in convolve.py. A quick and dirty > workaround is to always make the Gaussian distribution longer than the > binary pattern, but for very large binary patterns this increases the > calculation time significantly. Does anyone have an idea how to solve this > properly? > > Met vriendelijke groeten, > > Remco Jager > > MAPPER Lithography > Lorentzweg 1 > 2628 CJ Delft, The Netherlands > tel.: +31 (0)15 2789439 > fax: +31 (0)15-2789473 > http://www.mapperlithography.com > > This e-mail, attachments and (any part of) its content are (i) intended for > the named addressee(s) only and (ii) strictly confidential and proprietary. > All rights are reserved by MAPPER Lithography. Any unauthorized use, > disclosure and/or copying are strictly prohibited, except with prior and > express written permission by MAPPER Lithography. Should you have received > this e-mail, attachments and its content by mistake, please bring this to > our attention and destroy this e-mail and attachments in full. Thank you. > > > > > > > ------------------------------------------------------- > This SF.net email is sponsored by: SF.net Giveback Program. > Does SourceForge.net help you be more productive? Does it > help you create better code? SHARE THE LOVE, and help us help > YOU! Click Here: http://sourceforge.net/donate/ > _______________________________________________ > Numpy-discussion mailing list > Numpy-discussion(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/numpy-discussion -- Dr. Peter J. Verveer Cell Biology and Cell Biophysics Programme European Molecular Biology Laboratory Meyerhofstrasse 1 D-69117 Heidelberg Germany Tel. : +49 6221 387245 Fax : +49 6221 387306

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NumPy-Discussion December 2003