Perceptual Hash Generator vs Alt-Image-Hash
Perceptual Hash Generator is the baseline in this comparison: Generate pHash-style, average hash, and difference hash fingerprints from an uploaded image locally in your browser.
Alt-Image-Hash is a JavaScript library for ImageData-based perceptual hashes including dHash, aHash, median hash, and block hash.
Quick verdict
TextFaker lists Alt-Image-Hash as an open-source alternative for JavaScript developers while remaining focused on no-code browser results.
How Perceptual Hash Generator fits
TextFaker provides a UI-oriented implementation for uploaded images and includes pHash-style output, which this library's documented set does not emphasize.
How Alt-Image-Hash fits
Alt-Image-Hash is developer-focused and strong for ImageData workflows, with multiple hash algorithms and built-in diff examples.
Side-by-side comparison
| Decision point | Perceptual Hash Generator | Alt-Image-Hash | Takeaway |
|---|---|---|---|
| Input model | Our workflowFile upload decoded locally through browser APIs. | Competitor workflowLibrary functions operate on ImageData input. | TextFaker handles the user-facing decode workflow. |
| Hash set | Our workflowpHash-style, aHash, and dHash included. | Competitor workflowDocuments dHash, aHash, median hash, and block hash. | TextFaker covers pHash search intent more directly. |
| Comparison | Our workflowShows Hamming-distance guidance for users. | Competitor workflowDocumentation includes diff behavior between hashes. | Both value comparison, but TextFaker makes it visible in UI. |
| Audience | Our workflowNo-code web users and QA teams. | Competitor workflowDevelopers integrating a package. | Different user groups. |
| Output | Our workflowCopy-ready hex values and copy-all result. | Competitor workflowProgrammatic hash objects and properties. | TextFaker is more convenient for manual capture. |
| Extensibility | Our workflowFocused tool in shared registry. | Competitor workflowReusable library for custom apps. | Alt-Image-Hash is better for app builders. |
Use Perceptual Hash Generator when
- Users who need pHash-style output plus aHash and dHash
- Manual upload and copy workflows
- Privacy-first non-developer use
- Clear result labeling and Hamming guidance
Use Alt-Image-Hash when
- JavaScript developers working with ImageData
- Projects needing aHash, dHash, median hash, or block hash
- Programmatic image comparison
- Users who need library-level diff behavior
Detailed comparison
ImageData Relevance
Alt-Image-Hash is relevant because TextFaker decodes images to canvas/ImageData before hashing. The comparison frames a developer library beside a finished browser tool.
Algorithm Coverage
The documented algorithms cover dHash and aHash but not the requested pHash-style output. TextFaker satisfies that search intent explicitly.
Copy and Guidance
TextFaker turns raw hash values into a small report users can copy into an issue, database seed, or moderation note.
- Include file name and dimensions in copy-all output.
Testing
Because ImageData-based hashes can vary if preprocessing changes, tests lock down grayscale conversion, resizing, and bit-order behavior.
Research notes
- Real JavaScript library with several perceptual hash methods.
- Good implementation-adjacent alternative.
- Not a full pHash replacement based on researched docs.
- Useful for thinking about ImageData API ergonomics.
Official source
The only outbound competitor link on this page is placed here for source checking after the comparison.
Official Alt-Image-Hash source