possible bug grayscale verbose info IM 6.7.6.9 Q16
Posted: 2012-05-11T14:20:51-07:00
IM 6.7.6.9 Q16 Mac OSX Snow Leopard.
Some of my script are failing in comparison to IM 7.6.4.10 when processing grayscale images. I find differences simply looking at the verbose info of the grayscale jpg using both releases.
Input:
That is in IM 6.7.4.10 the verbose info shows:
im6 convert clown.jpg -verbose info:
rending intent of none
no chromaticity values.
In the current 6.7.6.9 release it show:
convert clown.jpg -verbose info:
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
I thought grayscale images were going to be treated as linear. Please clarify. Can we go back to linear grayscale images?
Some of my script are failing in comparison to IM 7.6.4.10 when processing grayscale images. I find differences simply looking at the verbose info of the grayscale jpg using both releases.
Input:
That is in IM 6.7.4.10 the verbose info shows:
im6 convert clown.jpg -verbose info:
rending intent of none
no chromaticity values.
In the current 6.7.6.9 release it show:
convert clown.jpg -verbose info:
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
I thought grayscale images were going to be treated as linear. Please clarify. Can we go back to linear grayscale images?