Patent ID: 7800681

Claim:
An image pickup device comprising: an optical system having a distortion characteristic, the optical system capturing an optical image of an object, the distortion characteristic magnifying a center portion of the optical image and reducing a peripheral portion of the optical image; an image sensor that converts the optical image into image data; a frame memory that stores the image data; a frame memory output control unit that reads a first selected portion of the image data out of the frame memory, the first selected portion being defined by an angle of view, the angle of view being externally defined; a first filter unit that applies a first filtering process to a second selected portion of the image data to generate first-filtered image data, the second selected portion being included in the first selected portion, the second selected portion having a first range of distortion that is smaller than a first threshold value; and a distortion correction unit that performs a distortion correction of the first-filtered image data to generate distortion-corrected image data; wherein the image sensor has a color filter array of Red (R) color filters, Green (G) color filters, and Blue (B) color filters, and wherein the image pickup device further comprises: an RGB synchronization unit that calculates an addition of color image data sets of adjacent pixels to a target pixel to generate different color image data of the target pixel, the adjacent pixels having a color different from a target color of the target pixels, the calculation of the addition being made with weighting the adjacent pixels based on distances of the adjacent pixels to target pixels, the distances being defined under a condition that the distortion correction has been made.