gammasat may lead to buggy images

[gabriel_agm]

I was using XnView to apply some filtering in batch mode to correct the way some images are displayed in a particular cellphone.
I'm using PNG format, and everithing was ok until I used gammasat.
When I use gammasat the image is not recognized by the cell phone.
It doesn't open on Gimp either.
I've tried to save as Tiff, for test purposes, and its the same, gammasat makes the image totally transparent.
Gammasat is a great filter and I would like to use it, is there an equivalent for it, that is, can I sepparate the gammasat value in some gamma and saturation ones?
This filter adds any special header to PNG/TIFF images?

Using: XnView 1.82.4 and Gimp 2.3.8 for Windows.

tks.

[xnview]

I was using XnView to apply some filtering in batch mode to correct the way some images are displayed in a particular cellphone.
I'm using PNG format, and everithing was ok until I used gammasat.
When I use gammasat the image is not recognized by the cell phone.
It doesn't open on Gimp either.
I've tried to save as Tiff, for test purposes, and its the same, gammasat makes the image totally transparent.
Gammasat is a great filter and I would like to use it, is there an equivalent for it, that is, can I sepparate the gammasat value in some gamma and saturation ones?
This filter adds any special header to PNG/TIFF images?

Using: XnView 1.82.4 and Gimp 2.3.8 for Windows.

You use picture in 32bits??

[gabriel_agm]

Yes, it's in 32 bit mode.
Using TrueColor it works, but then I loose the alpha channel;

So, since I'm using +- 120 colors (its for a cell phone), I'm converting it to Truecolor, using the gammasat, then converting to 8-bit and saving the PNG with the option "pallete 0 is transparency".
Seems to work, fine to me

Thanks for the color depth tip.

[jeanlery2010]

I also encountered it a few months ago in which I performed a lot of trials. Along this, I had recognized that gammasat is not compatible for updating images. Though I also put the pictures in 32bits at its best, I really haven't seen the appearance its original output with gammasat. As of today, what is now the latest alternative to that innovation?