https://github.com/vmchale/perceptual-hash

Perceptual Hash in J
https://github.com/vmchale/perceptual-hash

j perceptual-hash perceptual-hashing phash

Last synced: 10 days ago
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Perceptual Hash in J

• Host: GitHub
• URL: https://github.com/vmchale/perceptual-hash
• Owner: vmchale
• License: bsd-3-clause
• Created: 2019-07-14T19:58:56.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2020-10-05T23:07:09.000Z (over 4 years ago)
• Last Synced: 2024-11-10T23:33:17.022Z (2 months ago)
• Topics: j, perceptual-hash, perceptual-hashing, phash
• Language: J
• Size: 1000 KB
• Stars: 8
• Watchers: 5
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# perceptual-hash

A DCT-based perceptual hash in J.

See [here](https://www.phash.org/docs/pubs/thesis_zauner.pdf) for background.

## Use

```j

load 'phash.ijs'

phash (read_image 'demo-data/frog.jpeg')

0 0 1 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1 1 0 0 0 0 0 1 1 1 0 1 0 0 1 0 1 0 0 0

phash (read_image 'demo-data/frog.png')

0 0 1 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1 1 0 0 0 0 0 1 1 1 0 1 0 0 1 0 1 0 0 0

phash (read_image 'demo-data/cat.png')

0 0 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 0 0 0 1 1 1 1 1 0 0 1 0 0 1 1 1 1 0 0 1 1 0 1 1 0 0 0 0 1 1 1 1 0 0 1

```