We propose a new scheme to re-compress JPEG images in a lossless way. Using a JPEG image as an input the algorithm partially decodes the signal to obtain quantized DCT coefficients and then re-compress them in a more effective way.

翻译：我们提出了一种新的无损再压缩JPEG图像的方案。该算法以JPEG图像为输入，部分解码信号以获得量化的DCT系数，然后以更有效的方式对其进行再压缩。