How to get each pixel value from a picture file!
Luwian at gmail.com
Tue Oct 24 01:14:49 CEST 2006
1)I just copy the tutorial to run "print pix[44,55]". I really dont
know why they wrote that?!
2) i think putpixel((44, 55), (0, 0, 0)) and putpixel((44,55),0) is
thank you again. I think I have solved my problem.
Steve Holden wrote:
> Lucas wrote:
> > Thank you for your answer.
> > I have some new questions:
> > 1) the value of return from getpixel() is a RGB number?
> > print im.getpixel((44,55)) ----> (160,160,160)
> Yes, that's an RGB tuple.
> > 2) I want to put a number into the picture for encryption(replace least
> > significant bit (LSB) of image intensity with message bit).
> > If i use putpixel((44,55),0) , the number 0 will be changed RGB
> > value or others.?
> I think you'd need to use
> putpixel((44, 55), (0, 0, 0))
> but it's easy enough to try out interactively ...
> > 3) pix = im.load()
> > print pix[44,55]
> > pix[44, 55] = value
> > my python cannt identify "[x,y]" ??
> Now what makes you think that an image can be addressed that way? I'd be
> quite surprised if yo got anything other than a TypeError doing that.
> Steve Holden +44 150 684 7255 +1 800 494 3119
> Holden Web LLC/Ltd http://www.holdenweb.com
> Skype: holdenweb http://holdenweb.blogspot.com
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