由于BP神经网络不需要充分的理论根据，利用色靶的大量数据，通过BP神经网络，建立了CMYK到L*a*b*色空间的转换关系，并评价了模型精度。研究结果表明：BP神经网络用于CMYK到L*a*b*颜色空间转换，计算速度快，转换精度较高。

Color space conversion of CMYK to L*a*b* model was established with the BP neural network and mass of data of color target. The accuracy of the BP neural network model was evaluated. Results showed that the BP neural network for CMYK to L*a*b* color space conversion has fast calculation speed and high precision.