说明：  Ov2640 is a 1 / 4 inch CMOS uxga (1632 * 1232) image sensor produced by omnivision. The sensor is small in size and low in voltage. It provides all the functions of a single-chip uxga camera and image processor. Through the control of SCCB bus, it can output 8 / 10 bit image data with various resolutions such as whole frame, sub sampling, scaling and window fetching. Uxga up to 15 FPS (SVGA up to 30 frames, CIF up to 60 frames). Users can completely control the image quality, data format and transmission mode. All image processing functions, including gamma curve, white balance, contrast and chroma, can be programmed through SCCB interface.