This file is frequently used in technical papers and GitHub repositories for the following reasons:

: "Judy" is a preferred image for testing Flicker and Artifacting because the ZMSFM model targets areas where the human eye is most sensitive to compression noise.

: How much space the compressed file takes relative to its resolution.

: It serves as a benchmark to show how JPEG XL can take a standard lossy JPEG and compress it further (often by 20% or more) without losing any data.

: The primary purpose of this file is to demonstrate the JPEG XL ability to "transcode" existing JPEG files into a more efficient format while maintaining the option for bit-perfect reconstruction (lossless) or visually identical (lossy) versions at significantly smaller file sizes. Technical Significance