perceptual-hash: Find duplicate images
Flags
Manual Flags
| Name | Description | Default |
|---|---|---|
| with-phash | Use FFI bindings to pHash | Disabled |
| llvm | Use LLVM backend to GHC rather than NCG | Disabled |
Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info
Downloads
- perceptual-hash-0.1.3.2.tar.gz [browse] (Cabal source package)
- Package description (revised from the package)
Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.
Maintainer's Corner
For package maintainers and hackage trustees
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| Versions [RSS] | 0.1.0.0, 0.1.0.1, 0.1.0.2, 0.1.1.0, 0.1.1.1, 0.1.2.0, 0.1.3.0, 0.1.3.1, 0.1.3.2, 0.1.3.3, 0.1.3.5, 0.1.4.1, 0.1.4.2, 0.1.4.3, 0.1.4.4, 0.1.4.5, 0.1.4.6, 0.1.4.7 (info) |
|---|---|
| Change log | CHANGELOG.md |
| Dependencies | base (>=4.9 && <5), containers, filepath, hip (<2), optparse-applicative (>=0.13.0.0), par-traverse (>=0.2.0.0), perceptual-hash, primitive, repa, stm (>=2.3), vector, vector-algorithms [details] |
| License | BSD-3-Clause |
| Copyright | Copyright: (c) 2019 Vanessa McHale |
| Author | Vanessa McHale |
| Maintainer | vamchale@gmail.com |
| Revised | Revision 1 made by vmchale at 2020-07-15T23:35:26Z |
| Category | Application, CommandLine, Images |
| Source repo | head: git clone https://github.com/vmchale/phash |
| Uploaded | by vmchale at 2019-09-28T01:46:00Z |
| Distributions | NixOS:0.1.4.7 |
| Executables | phash |
| Downloads | 4217 total (50 in the last 30 days) |
| Rating | 2.0 (votes: 1) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs uploaded by user Build status unknown [no reports yet] |
Readme for perceptual-hash-0.1.3.2
[back to package description]phash
This is a Haskell library to detect (potential) duplicate images.
It also contains a command-line tool.
Use
Use it on one or more directories:
phash ~/Pictures ~/Downloads
~/Pictures/frog.jpeg, ~/Downloads/frog.png
Installation
Script
On many platforms, you can install with a script, viz.
curl -sSl https://raw.githubusercontent.com/vmchale/phash/master/bash/install.sh | sh -s
Pre-Built Release
Download the latest release from here.
Source
Download cabal-install and GHC. Then:
cabal install perceptual-hash -w ghc-8.6.5
Library
You can find library documentation on Hackage.
Performance
This library is more performant than the pHash library for PNG images.
benchmarking fileHash/cat.png
time 21.42 ms (21.20 ms .. 21.63 ms)
1.000 R² (0.999 R² .. 1.000 R²)
mean 21.34 ms (21.28 ms .. 21.44 ms)
std dev 184.3 μs (93.40 μs .. 266.3 μs)
benchmarking fileHash/frog.jpeg
time 18.16 ms (18.07 ms .. 18.24 ms)
1.000 R² (1.000 R² .. 1.000 R²)
mean 18.24 ms (18.12 ms .. 18.31 ms)
std dev 230.1 μs (161.3 μs .. 360.2 μs)
benchmarking fileHash/frog.png
time 12.39 ms (12.35 ms .. 12.46 ms)
1.000 R² (0.999 R² .. 1.000 R²)
mean 12.38 ms (12.34 ms .. 12.43 ms)
std dev 114.0 μs (73.36 μs .. 156.5 μs)
benchmarking foreignHash/cat.png
time 27.21 ms (27.09 ms .. 27.47 ms)
1.000 R² (0.999 R² .. 1.000 R²)
mean 27.24 ms (27.18 ms .. 27.37 ms)
std dev 207.9 μs (84.97 μs .. 311.8 μs)
benchmarking foreignHash/frog.jpeg
time 12.81 ms (12.78 ms .. 12.84 ms)
1.000 R² (1.000 R² .. 1.000 R²)
mean 12.87 ms (12.85 ms .. 12.92 ms)
std dev 80.81 μs (56.17 μs .. 113.1 μs)
benchmarking foreignHash/frog.png
time 14.03 ms (13.94 ms .. 14.13 ms)
1.000 R² (1.000 R² .. 1.000 R²)
mean 13.95 ms (13.93 ms .. 13.99 ms)
std dev 79.36 μs (52.02 μs .. 119.5 μs)
Foreign Library
This package contains a foreign library and a header file