Convert JPG from AdobeRGB to sRGB using PIL?

Question

How can I detect if the JPG is AdobeRGB and if it is convert it in python to sRGB JPG.

If that is possible in PIL, that would be great. Thank you.

Answer 1

I had the same problem, I tested all answers and get wrong color in final image. @DrMeers All matrixes I've tried gave wrong result in red and blacks, so here is my solution:

The only way I found out is to read profile from image and convert using ImageCms.

from PIL import Image
from PIL import ImageCms
import tempfile

def is_adobe_rgb(img):
    return 'Adobe RGB' in img.info.get('icc_profile', '')
def adobe_to_srgb(img):
    icc = tempfile.mkstemp(suffix='.icc')[1]
    with open(icc, 'w') as f:
        f.write(img.info.get('icc_profile'))
    srgb = ImageCms.createProfile('sRGB')
    img = ImageCms.profileToProfile(img, icc, srgb)
    return img

img = Image.open('testimage.jpg')
if is_adobe_rgb(img):
    img =  adobe_to_srgb(img)
# then do all u want with image. crop, rotate, save etc.

I think this method can be used to any color profile, but not tested.