In order to solve the visual quality problem caused by the different structure or reflectivity of the object surface, a new adaptive illumination method based on camera-projector system is proposed. By adopting the dual-frequency grating fringes, both high and low frequency phase shift characteristics can be combined and used for unwrapping phase, which is more accurate than the traditional single frequency fringe unwrapping method. Thus, the necessary depth accuracy is improved in the measured process. Furthermore, different channels deal with different frequencies of fringe gratings by using the characteristic of the multiple channels of colored images. This method is twice as fast as the black-and-white image measurement method. Therefore, the dual-frequency phase shift adaptive method can meet the requirement of high speed and accuracy in machine vision measurement, and thus improves the on-line detection ability and can be widely used for industrial detection and image recognition.