3Rafael C Gonzalcz,Richard E Woods. Digital Image Processing(Second Edition)[M]. Beijing:Publishing House of Electronics Industry,2002.
4HUNG-SHUNG WONG,JUNC-HUA WANG. Contrast Enhancement Based on Divided Histogram Manipulation[A].2000 IEEE Int'1 Conf on Systems, Man and Cybernetics. Vol 2[C]. 2000. 1551-1555.