Batch processing of photos on post-editing

[Stephen Liu]

Hi all,

Further to my previous posting:

Also I have performed the test below

Step-1
Select a positive photo and open it on GIMP

Step-2
adjust brightness and contrast
-> Colors -> Brightness-Contrast

Find a set of their values. The brightness and contrast of the photo are satisfy to me.
Example: brightness 23 and contrast 56

Step-3
Run following IM command on Terminal;

Code:

$ mogrify -brightness-contrast 23x56 *.*

The command works seamlessly but the brightness and contrast look completely different viewed on Image Views. I don't know why?

I have to adjust their values blindlessly.

Regards
SL