Technical Specifications 1 of 7
Technical Characteristics
The common photographic JPEG uses transform-based lossy compression. Baseline and progressive encoding affect delivery and decoding behavior, not whether the art is suitable for a given machine. The broader JPEG family includes modes beyond the familiar web image.
JPEG 1 includes baseline sequential, progressive, and other coding possibilities. In common photographic use, lossy compression typically reduces spatial and color detail; high-contrast edges can show ringing or blocks at aggressive settings. The standard's existence does not mean every viewer or machine implements every mode.
| Feature | Practical interpretation |
|---|---|
| Baseline sequential | Commonly supported form; verify if a legacy recipient specifies it |
| Progressive | Image can refine over multiple scans during download; check recipient support |
| Lossless modes in JPEG 1 | Exist in the broader standard but are not what a typical quality-slider export means |
| Chroma subsampling | Can reduce color detail independently of luminance detail |
| Embedded metadata | May carry orientation, camera information, or profile data; inspect rather than assume |