The vertically integrated diode can sense blue and red illumination simultaneously, and can provide full color information with green/magenta filter on it. It can also be used in the CMOS image senor for its fully compatibility with standard CMOS process. Through extraction of photogenerated carriers at different depths by vertically integrated diode with two color filters, the full color image is got. Through simulation and experiment, each channals response curve is got, an enhanced sound-robust method with multi-polynomial regression is proposed, and the color space transform matrix is obtained. The sensors four-channel response is converted to CIE XYZ three-stimulus-values. In the CIE L*A*B* space, comporation between cooridinate and sensed color coordinate is proposed, and the apparatus color accuracy is quantitively evaluated. The result shows that the device colorimetric accuracy is superior to that of a simple linear transformation, even better than commercial colorful CCD with Bayer filter.