What colour model does the image use in PIL

[Johny]

I use PIL and with it im.getpixel((x,y)) to find out the colour of a
pixel.
But how can I find out in which color model the the return value
is?

For example for png picture format

im.getpixel((20,50)) gives the result 60.

What does the value mean?
Is it possible to find out the RGB model values?

Thank you for help.
L.

 

[Hrvoje Niksic]

I use PIL and with it im.getpixel((x,y)) to find out the colour of a
pixel. But how can I find out in which color model the the return
value is?

im.mode gives you a string such as 'RGBA' or 'CMYK'. im.getbands()
returns a tuple such as ('R', 'G', 'B', 'A').

 

[Johny]

im.mode gives you a string such as 'RGBA' or 'CMYK'. im.getbands()
returns a tuple such as ('R', 'G', 'B', 'A').

Thank you for your help.
Can you please help me once more?
Now I would need to apply a threshold value to the image, where
everything above a certain brightness level becomes white, and
everything below the level becomes black.
How can I do that with PIL?
Thank you
L

 

[Hrvoje Niksic]

I would need to apply a threshold value to the image, where
everything above a certain brightness level becomes white, and
everything below the level becomes black. How can I do that with
PIL?

I think you're supposed to use the "point" method, but I don't have an
example ready. See
http://mail.python.org/pipermail/image-sig/2004-November/003019.html
for a hint.