This matlab code read bmp file and seperate it to R,G,B components. And also quantize the image.

量化算法是数字水印技术嵌入算法的重要组成部分。通过修改数字图像的低频系数将所需嵌入的水印信息嵌入到载体图像中-Quantization Watermarking embedding algorithm is an important part. Digital image by modifying the frequency coefficients will be required to embed the watermark information is embedded into the

The JPEG compression scheme is divided into the following stages: 1. Transform the image into an optimal color space. 2. Adjust Aspect Ratio 16:9 3. Digitization Scheme 4:2:0. 4. Apply a Discrete Cosine Transform (DCT) to blocks of pixels

A new fingerprint compression algorithm based on sparse representation is introduced. Obtaining an overcomplete dictionary from a set of fingerprint patches allows us to represent them as a sparse linear combination of dictionary atoms. In th