MRED with a low precision usually can be detected by a subjective way which is based on the human eye observation before. In order to improve the measurement accuracy, a new objective way based on the theory of Barten module was built, which was one model of Contrast Sensitivity Functions(CSF). Four-bar target pattern was received by color imaging system. After a series of processing such as color space conversion, Fourier transform and CSF processing, the chromatic aberration on the CIELAB color space was calculated when the chromatic aberration of the test pattern reached the threshold value determined by CSF. Both of the two results tested by the subjective and objective way on different spatial frequencies of the four-bar target were recorded and compared. The results show that the value got by the subjective measurement method is consistent with that of the objective. That means the subjective measurement method based on human visual model in this paper is desirable.