Applying Offsets To White & Black Images
The offsets determined for the two levels of ambient light can be applied to the photographic data captured for the respective ambient light condition. These ambient light offsets can only be applied to black regions of an image. Conversely the offsets determined from the projected white light can only be applied to white regions of an image.
It should go without saying that these offsets are only useful in correcting white or black regions of the image. Therefore they can only be used for all white, all black (with ambient light), or the black & white bar images.
To help locate the proper sample regions there have been some test images added that have the measurement grid superimposed on them. The Black & White bar image has also been modified to better fit this measurement grid.
More information will be provided on this topic as I develop this method of correcting photographic data.