LENA_256.BMP lsb_Recovered.bmp lsb_watermark.bmp lsb_watermark1.bmp lsb_watermark128.bmp lsb_watermarked.bmp ying_256.bmp dct_total_ss.asv dct_total_ss.m insert_watermark.bmp insert_watermark1.bmp lena.bmp lena256.bmp LENA_64.bmp LENA_128.bmp