"Lucas" <[EMAIL PROTECTED]> wrote:
>
>2) I want to put a number into the picture for encryption(replace least
>significant bit (LSB) of image intensity with message bit).
What formats are your images? Remember that JPEG images are compressed
when they are written. It is rather unlikely that your
Dennis Lee Bieber wrote:
>> 2) i think putpixel((44, 55), (0, 0, 0)) and putpixel((44,55),0) is
>> same.
>
> It shouldn't be... The former is three separate data values, the
> latter is one.
the "putpixel" API is polymorphic; you can use either tuples or integers
for RGB pixels (the latter should
Steve Holden wrote:
>> 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
At Monday 23/10/2006 21:02, Lucas wrote:
http://www.pythonware.com/library/pil/handbook/image.htm
im.load() said
> > 1)I just copy the tutorial to run "print pix[44,55]". I really dont
> > know why they wrote that?!
It clearly states that this syntax applies only to version 1.1.6 -
and
http://www.pythonware.com/library/pil/handbook/image.htm
im.load() said
Leif K-Brooks wrote:
> Lucas wrote:
> > 1)I just copy the tutorial to run "print pix[44,55]". I really dont
> > know why they wrote that?!
>
> What tutorial? Where does it say that?
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Lucas wrote:
> 1)I just copy the tutorial to run "print pix[44,55]". I really dont
> know why they wrote that?!
What tutorial? Where does it say that?
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:)
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
same.
thank you again. I think I have solved my problem.
Steve Holden wrote:
> Lucas wrote:
> > Thank you for your answer.
> >
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
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)
2) I want to put a number into the picture for encryption(replace least
significant bit (LSB) of image intensity with message b
Lucas wrote:
> I want to change some pixel value in the picture file. how to do it?
>
The most popular way is probably the Python Image Library, known to its
friends as PIL:
http://www.pythonware.com/products/pil/
You will see from
http://www.pythonware.com/library/pil/handbook/image.htm
I want to change some pixel value in the picture file. how to do it?
If I read the file in binary mode, a bit == a pixel ?
Thanks
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