I noticed that the color levels are modified by the iMX6 HDMI output.
Here is the test I passed:
I generated monochrom images (ie : [240;0;0] [15;0;0]), I play them either using gstremer image freeze either an image processing application (ImageJ). I have an analyser at the HDMI output that shows that the codes are not anymore the code of the image file played. I made the same test with a PC on windows and the image levels are right the image file levels.
I am wondering if there is a transformation in the iMX6 display module (it seems to be like a gamma transformation or a LUT).
Does anyone knows about this issue? It there is suche a signal trnasformation, is there a way to bypass it?
Thank you very much for your help.