In an effort to reduce the size of JPEG images and speed the loading times of Web pages, Firefox parent Mozilla announced the release of compression technology mozjpeg 2.0, and Facebook announced that it will test mozjpeg 2.0 on Facebook.com.
The social network will also contribute $60,000 toward the ongoing development of the technology, including its next release, mozjpeg 3.0.
Mozilla Senior Technology Strategist Josh Aas offered more details on mozjpeg 2.0 in a blog post:
The major feature in this release is trellis quantization, which improves compression for both baseline and progressive JPEGs without sacrificing anything in terms of compatibility. Previous versions of mozjpeg only improved compression for progressive JPEGs.
We’d like to hear any constructive feedback you might have. In particular, please let us know if you have questions or comments about our code, our methodology, or further testing we might conduct.
Also, the four image quality scoring algorithms used in this study (Y-SSIM, RGB-SSIM, MS-SSIM, and PSNR-HVS-M) should probably not be given equal weight, as each has a number of pros and cons. For example: some have received more thorough peer review than others, while only one takes color into account. If you have input on which to give more weight please let us know.
We’ve set up a thread on Google Groups in order to discuss.
Image courtesy of Shutterstock.