Single running shoe on a plain (JPEG q50)
The same plate encoded once at JPEG quality 50. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate pr-shoe.
Specifications
- Width
- 1024
- Height
- 1024
- Jpeg Quality
- 50
- Role
- degraded-variant
- Derived From
- pr-shoe.png
- Synthetic
- true
- Disclosure
- AI-generated / synthetic. Not a photograph of a real person, place or event.
- Family
- product
- Schema Version
- 1
- Alt Text
- Single running shoe on a plain white studio background, soft light
- Alt Text Source
- prompt
Testing contract
Expected to pass- Scenario
- Decode this file and the lossless PNG in the same group, then compare dimensions and pixel count before comparing pixels.
- Expected result
- Both decode to 1024x1024. This copy was encoded as JPEG, so the PIXELS differ from the reference and the GEOMETRY does not: a decoder returning different dimensions or a different pixel count has lost something rather than merely produced a smaller file.
What is a .jpg file?
JPG is the common extension for JPEG, a lossy raster format that uses discrete cosine transform compression tuned for photographic images. It is 8-bit truecolor with no alpha channel, and quality is traded against file size via a compression factor. It is ubiquitous for photos on the web and from cameras.
How to use this file
Use an example JPG to test decoders, EXIF/metadata parsers, re-encoding quality, and orientation handling, or to confirm converters and image pipelines process baseline and progressive scans correctly.
How to use this file for testing
“Single running shoe on a plain (JPEG q50)” is a deterministic Novus Examples fixture for Media handling. Generated stills, clips and audio published in several encodings of identical content, so a media pipeline can be tested on format handling, quality loss and frame or sample extraction against a reference that is known rather than assumed.
Documented properties for this file: 1024×1024 · degraded-variant · JPEG q50. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.
For image AI or enhancement tools, run the model or filter on this file and diff against the clean or ground-truth companion in the same group when available. Keep seeds and documented damage parameters in your evaluation notes so regressions are attributable.
Code examples
<img src="pr-shoe-q50.jpg" alt="Example image" width="640" loading="lazy">Related files
- jpgA barista in her twenties (JPEG q25)The same plate encoded once at JPEG quality 25. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate owner-cafe.
- jpgA barista in her twenties (JPEG q50)The same plate encoded once at JPEG quality 50. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate owner-cafe.
- jpgA barista in her twenties (JPEG q75)The same plate encoded once at JPEG quality 75. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate owner-cafe.
- jpgA Black man in his seventies (JPEG q25)The same plate encoded once at JPEG quality 25. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate p-market-sen.
- jpgA Black man in his seventies (JPEG q50)The same plate encoded once at JPEG quality 50. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate p-market-sen.
- jpgA Black man in his seventies (JPEG q75)The same plate encoded once at JPEG quality 75. Blocking and ringing are bounded by that single pass, so a restorer can be scored against the PNG reference in this group rather than against an opinion Plate p-market-sen.
Generated by generation/comfy_media_wave.py. Free for any use, no attribution required, license.