Request More Help With XBM Image
Peter Otten
__peter__ at web.de
Tue Mar 1 03:56:56 EST 2016
Wildman via Python-list wrote:
> I want to take an image file, convert it to XBM format and
> display it. Thanks to Mr. Otten I can open and display the
> XBM image without any problems. The script first calls an
> external program for the image conversion then I can open
> and display it. Of course, I am left with the XBM file that
> needs to be deleted. It seemed to me to be a better approach
> to use stdout and pipe thereby eliminating the XBM file
> altogether. Here is code I have so far but I'm not sure
> what to do next...
>
> convert = "convert " + fileName + " -resize 48x48! -threshold 55% xbm:-"
> p = subprocess.Popen([convert], stdout=subprocess.PIPE, shell=True)
> xbmFile, err = p.communicate()
Why would you need a shell?
> The variable fileName contains the image file path and name.
> The variable convert contains the complete command. The last
> argument in the command tells the convert utility to covert
> to an XBM and to direct the output to stdout. After the above
> code runs xbmFile contains the actual image, which is plain
> text. (X BitMap (XBM) is a plain text binary image format.)
>
> My question is how do I take the xbmFile variable and convert
> it to an image object that can be displayed? The technique
> for displaying an image from a file does not work or at least
> I have not been able to get it to work.
I think Image.open() accepts a file-like object, so
import io
...
command = [
"convert", fileName,
"-resize", "48x48!",
"-threshold", "55%",
"xbm:-"]
p = subprocess.Popen(command, stdout=subprocess.PIPE)
xbmFile, err = p.communicate()
openImage = Image.open(io.BytesIO(xbmFile))
should work.
More information about the Python-list
mailing list