Need suggestions about tone mapping for EXR

Sisqos

Hi, everyone.
I need some suggestions about the tone mapping of openEXR.
Currently, my tool can road EXR file and QLabel displays the image, but I found the color represents differently from other tools, like Natron, NUKE, and photoshop.
The comparison is: (Right is mine. Left is in Natron)

I've tried these settings to display EXR on the screen.
In freeImage, it offers FITMO_DRAGO03, FITMO_REINHARD05, and FITMO_FATTAL02 to convert
High Dynamic Range to 24bit. The code is shown below.

 rescaledBitMap = FreeImage_ToneMapping(bitMap, FITMO_DRAGO03);
 FreeImage_AdjustGamma(rescaledBitMap, 1.0);//I leave it default, just show the idea

No matter which parameter I applied the color didn't represent what I expect.
I also adjust the Gamma and Exposure. No luck. The image is always different from other results displayed in Natron, NUKE, and photoshop.

If you have any ideas, please share them. Anything I love to learn.
Thanks for your help.
Have a good day.

SGaist

Hi,

AFAIK, Qt currently does not support such a dynamic range. The current highest is 16 bit so that might the difference you see.

Sisqos

@SGaist said in Need suggestions about tone mapping for EXR:

16 bit

Thanks for the info. It might help.