File list (Check if you may need any files):
dct\exp1_7\alphabet.txt
...\......\alphabet2.txt
...\......\chinese.txt
...\......\chinese2.txt
...\......\dcthide.m
...\......\extractdct.m
...\......\hj.txt
...\......\hj2.txt
...\......\lenna_gray_256_jpg.jpg
...\......\lenna_gray_256_jpg_stego1.bmp
...\......\lenna_gray_256_jpg_stego2.bmp
...\......\lenna_gray_256_jpg_stego3.bmp
...\......\lenna_gray_256_jpg_stego4.bmp
...\......\secret.txt
...\......\secret2.txt
...\......\Thumbs.db
...\实验报告2.doc
...\exp1_7
dct