https://github.com/hideack/phash-study

https://github.com/hideack/phash-study

Last synced: about 1 year ago
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• Host: GitHub
• URL: https://github.com/hideack/phash-study
• Owner: hideack
• Created: 2015-03-12T23:22:38.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2017-05-07T02:48:58.000Z (about 9 years ago)
• Last Synced: 2025-03-30T19:51:18.583Z (over 1 year ago)
• Language: JavaScript
• Size: 1.39 MB
• Stars: 0
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# phash-study

## 実験1 同一画像の加工時の比較

- いくつかサンプル画像を用意して試してみる。利用した画像は ```samples``` 以下に置いてある。

- サンプル

 - おなじみのlena画像を各種加工してみる

 

### 結果

| No | 画像 | ハッシュ値 | No.0とのハミング距離 |

|----|------|------------|----------------------|

|0 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena.jpg)            | c91cb262775a9800 | - |

|1 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena-small.jpg)      | c91cb262775a9800 | 0 |

|2 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena-sepia.jpg)      | c914b262775a9800 | 2 |

|3 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena-mosaic.jpg)     | c98cb022375ad800 | 8 |

|4 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena-cut.jpg)   | c9acb866635a9800 | 8 |

|5 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena-cut2.jpg)  | cb8cba66535a9800 | 8 |

|6 | ![](https://raw.githubusercontent.com/hideack/phash-study/master/samples/lena-horizonal-flip.jpg) | dc69f7330287e000 | 34 |

### サンプルプログラム

```javascript

var pHash = require("phash");

var samples = [

  "samples/lena.jpg",

  "samples/lena-small.jpg",

  "samples/lena-sepia.jpg",

  "samples/lena-mosaic.jpg",

  "samples/lena-cut.jpg",

  "samples/lena-cut2.jpg",

  "samples/lena-horizonal-flip.jpg"

];

var hash = [];

samples.forEach(function(sample) {

  hash.push(pHash.imageHashSync(sample));

});

for(var i=0; i