File list (Check if you may need any files):
四_人脸检测\picture_3.jpg
...........\picture_4.jpg
...........\project4_4_1_training.m
...........\project4_4_2_P3_L3.m
...........\project4_4_2_P3_L4.m
...........\project4_4_2_P4_L3.m
...........\project4_4_2_P4_L4.m
...........\project4_4_3_1_rotate.m
...........\project4_4_3_2_magnify.m
...........\project4_4_3_3_light_change.m
...........\自编的功能函数_运行以上程序前workspace中要有这些
...........\................................................\back2.m
...........\................................................\code_compensation.m
...........\................................................\de_zigzag.m
...........\................................................\decode_ac_huffman.m
...........\................................................\decode_huffman.m
...........\................................................\DIY_dct.m
...........\................................................\DIY_idct.m
...........\................................................\huffman.m
...........\................................................\zigzag.m