More changes to grab_chroma - combine it with imageShift
More changes to grab_chroma - combine it with imageShift

FRC900/2016VisionCode,FRC900/2016VisionCode,FRC900/2016VisionCode,FRC900/2016VisionCode,FRC900/2016VisionCode,FRC900/2016VisionCode,FRC900/2016VisionCode