Set Contrast/Set Brightness settings not working above 0

[jimtxas]

Hello-

I'm using the following code to try to increase the brightness or contrast settings of images and setting the SETCONTRAST or SETBRIGHTNESS values of anything > 0 does not work... I can only reduce the values. it seems to work somewhat on color images only. It's also interesting to point out that the utility is suggesting some of these images IsGreyscale=True when in fact they are bitonal images.... not sure if that has any effect.

I'm currently running v6.7.0.9

[Loïc]

Hi,

Changing contrast and brightess on a bitonal image has no sense. You have to convert it ti 24 bit first, to obtain the correct level of gray.
Kind regards,

Loïc