The present invention provides a
gain calling
system, comprising an
image processing chip and an
image processing auxiliary module, wherein the
image processing chip comprises a lens shading correction unit, a cache unit, an on-
chip storage unit, an on-chip storage
control unit and an off-chip storage
control unit, and the image
processing auxiliary module comprises an off-chip storage unit, wherein all block point
gain values are uniformly stored through the off-chip storage unit, and when the lens shading correction unit performs lens shading correction
processing on an image, the off-chip storage
control unit retrieves the corresponding block point
gain value from the off-chip storage unit and transmits it to the on-chip storage control unit, and then the on-chip storage control unit writes the on-chip storage unit, and then the on-chip storage control unit reads the on-chip storage unit and writes the cache unit, thereby greatly reducing the memory size of the on-chip storage unit, thereby reducing the area of the image
processing chip. The present invention also provides a gain calling method.