I have two sets of photos, each taken from two different Machine Vision Cameras. To keep the noise level same in both photos, I have to set the R,G, B gains to the same level. But the problem with that approach is that, at unity gain (Gain = 1) the photos look very different for the same subject (a Gray card). In essence, the color temperature is different for the two camera systems and needs to be configured to the same temperature. Any idea how that can be done ?
PS: I do not want to white balance the photos. I want to keep the color of the white point same between two different photos.
Adding some more information. I have done some preliminary tests on both systems. First, I have fixed all R,G,B gains at 1,1,1 and taken a photo of a Gray card. Then, I have progressively increased the gains of R from 1 to 1.1,1.2 and so on, upto 2. Same for G and B. The excel sheet attached contains the means of the R,G and B values and the grey box is the corresponding Std. deviation. The same is done for the other machine.