Diff Regression B — 1Px Shift (288px)
Changed twin B for visual-diff regression (pixel: 1px-shift). Expect a non-zero pixel / perceptual diff vs A.
Specifications
- Width
- 288
- Height
- 288
- Role
- changed B
- Diff Kind
- pixel
- Seed
- 1200
What is a .png file?
PNG (Portable Network Graphics) is a raster image format using lossless DEFLATE compression. It supports full 8- or 16-bit-per-channel truecolor, palette, and greyscale modes with an optional alpha channel, but no animation. It is the standard choice for screenshots, logos, and graphics with sharp edges or transparency.
How to use this file
Use an example PNG to test image decoders, alpha-compositing, thumbnail generators, and format converters, or to verify that a pipeline preserves transparency and color depth on round-trip.
How to use this file for testing
“Diff Regression B — 1Px Shift (288px)” is a deterministic Novus Examples fixture for Visual diff / regression. A/B image twins with controlled pixel changes, anti-alias variants, and UI chrome crops for screenshot diff and visual regression tools.
Documented properties for this file: 288×288 · seed 1200 · changed B. 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.
Treat A/B twins as a visual regression unit: run your pixel or perceptual diff, assert a non-zero delta on the changed twin, and keep thresholds calibrated against the documented change kind in specs.
Code examples
<img src="1px-shift-b.png" alt="Example image" width="640" loading="lazy">Related files
- pngDiff Regression A — 1Px Crop (288px)Baseline twin A for visual-diff regression (pixel change suite: 1px-crop). Compare against twin B.
- pngDiff Regression A — Button Add (288px)Baseline twin A for visual-diff regression (button change suite: button-add). Compare against twin B.
- pngDiff Regression A — Button Label (288px)Baseline twin A for visual-diff regression (button change suite: button-label). Compare against twin B.
- pngDiff Regression A — Colour Tint (288px)Baseline twin A for visual-diff regression (colour change suite: colour-tint). Compare against twin B.
- pngDiff Regression A — Corner Badge (288px)Baseline twin A for visual-diff regression (button change suite: corner-badge). Compare against twin B.
- pngDiff Regression A — Dot Noise (288px)Baseline twin A for visual-diff regression (pixel change suite: dot-noise). Compare against twin B.
Generated by generation/images_wave_e.py. Free for any use, no attribution required — license.