• We’ve implemented trellis quantization to reduce file sizes for both baseline and progressive images.
• The cjpeg utility now supports JPEG input in order to simplify re-compression workflows.
• We’ve added options to specifically tune for PSNR, PSNR-HVS-M, SSIM, and MS-SSIM metrics.
• We now generate a single DC scan by default in order to be compatible with decoders that can’t handle arbitrary DC scans.