Skew detection and correction is very important task before pre-processing of an image and it is a major problem in scanned documents, if it not detected correctly it will lead wrong result in future during image analysis. During the scanning of th

dct变换+扩频的数字水印算法 水印为随即序列,推荐一下 不错的(DCT transform + spread spectrum watermarking algorithm Watermark for sequence then, recommend some good)

Calculate Mel-frequency cepstral coefficients by: - take the absolute value of the STFT - warp to a Mel frequency scale - take the DCT of the log-Mel-spectrum - return the first <ncep> components