Actual image - data that comes to the sensor through the lens
The image data that reaches the sensor pixels through the Bayer color filters
Same data with the visible color removed - anyway each pixel is monochrome as it can detect only a single color

Registration of the images by the image sensor through the Bayer color mosaic filters



See more examples of the color conversion (you may generate them from your data sets too) at http://community.elphel.com/jp4