https://github.com/fujiharuka/node-maxmin-filter

Max-Min Filter of image implemented in JavaScript
https://github.com/fujiharuka/node-maxmin-filter

Last synced: 5 days ago
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Max-Min Filter of image implemented in JavaScript

• Host: GitHub
• URL: https://github.com/fujiharuka/node-maxmin-filter
• Owner: FujiHaruka
• License: mit
• Created: 2017-02-15T13:01:55.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2022-12-09T08:14:21.000Z (almost 2 years ago)
• Last Synced: 2024-04-13T19:32:02.478Z (7 months ago)
• Language: JavaScript
• Size: 753 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# node-maxmin-filter

Max-Min filter of image implemented in JavaScript. Both in Node.js and browser.

+ [Demo](https://fujiharuka.github.io/node-maxmin-filter/demo.html)

## Install

```

$ npm install maxmin-filter

```

## Usage

I made it as an [ndarray](https://github.com/scijs/ndarray) module. So, the simplest usage is with [get-pixels](https://github.com/scijs/get-pixels) and [save-pixels](https://github.com/scijs/save-pixels) as below.

```js

const fs = require('fs')

const savePixels = require('save-pixels')

const getPixels = require('get-pixels')

const maxminFilter = require('maxmin-filter')

getPixels('src.png', (err, pixels) => {

  if (err) {

    throw err

  }

  let filtered = maxminFilter(pixels)

  savePixels(filtered, 'png').pipe(fs.createWriteStream('dist.png'))

})

```

## API

### `maxminFilter(pixels[, options])`

Returns a thresholded ndarray.

* `pixels` - an ndarray whose shape is [width, height, channels].

* `options.size` - the filter size.