Vue Component for Multiple image Comparison

Vue Component for Multiple image Comparison
vue component for multiple image comparison. currently supported only 8bit jpg and png format.

vue-image-diff


vue component for multiple image comparison.
multiple images can be panned and scaled simultaneously and compared by pixel-wise.
currently supported only 8bit jpg and png format.

Examples

Web-App: https://github.com/whwnsdlr1/image-diff
jsfiddle1 - using web image url: https://jsfiddle.net/whwnsdlr1/xgz21e95/
jsfiddle2 - diff blur images: https://jsfiddle.net/whwnsdlr1/84bkq2hy/
jsfiddle3 - using input event: https://jsfiddle.net/whwnsdlr1/38zhbtm1/

Usage

install

npm i vue-image-diff

how to include component

in Vue Project

text-html-basic
<template>
...
<vue-image-diff :data="data" :options="options" :options-tool-bar="optionsToolBar" />
...
</template>
<script>
import vueImageDiff from 'vue-image-diff'
export default {
  ...
  components: {
    'vue-image-diff': vueImageDiff
  }
  ...
}
</script>

in html

text-html-basic
<body>
<script src="vue.js"></script><!-- include vue.js first! -->
<script src="VueImageDiff.js"></script>
...
<div class="container">
  <vue-image-diff :data=data :options=options :options-tool-bar=optionsToolBar />
</div>
...
<script>
new Vue({
  el: '.container',
  components: {
    'vue-image-diff': vueImageDiff
  },
  data: {
    return {
      data: [],
      options: {}
    }
  }
})
</script>
</body>

props

data

An array of objects that hold image information.

source-js
data = [
  {
    name: 'korea Mountains', // String: text to show overlay region
    blob: blob, // Blob: ImageBlob to show
    ext: 'jpg' // String: 'jpg' or 'png'
    params: {author: 'fxgsell'}, // Object, (optional): default value is {}. text to show overlay region
    id: id // String, (optional): default value is created by uuid4(). unique id 
  }
]

options

An object that gives information about the initial state of the component.

source-js
options = {
  coord: {
    x: 0, // Number, (optional): default value is 0\. coordinate x
    y: 0 // Number, (optional): default value is 0\. coordinate y
  },
  zoom: 1, // Number, (optional): default value is calculate by windows. zoom, scale value. 1 is original scale
  voi: {
    windowCenter: 127, // Number, (optional): default value is 127\. range (0, 255]. adjust brightness
    windowWidth: 256 // Number, (optional): default value is 256\. range (1, 256]. adjust contrast
  },
  predefinedImageSize: {
    width: undefined, // Number or undefined, (optional): default value in undefined. width to be resized. if not set, other images are resized based on the first image size.
    height: undefined // Number or undefined, (optional): default value in undefined. height to be resized. if not set, other images are resized based on the first image size.
  },
  diff: {
    activate: false, // Bool, (optional): default value is false. flag to show diff ovelary
    reference: {
      id: undefined, // String or undefined, (optional): default value is undefined. base image to diff. if not set, it is selected as the first image.
    },
    tolerance: 1, // Number, (optional): default value is 1\. range [1, 441]. if difference value(Mean Square Error) is greater than or equal tolerance, pixel is set difference-tag. opposite, set same-tag less than tolerance.
    opacity: 0.7, // Number, (optional): default value is 0.7\. range (0, 1). opacity of diff overlay
    colors: {
      same: new Uint8ClampedArray([0, 0, 255]), // Array, (optional): default value is [0, 0, 255]. color rgb of same-tag pixel
      diff: new Uint8ClampedArray([255, 0, 0]) // Array, (optional): default value is [0, 0, 255]. color rgb of diff-tag pixel
    }
  },
  style: {
    borderWidth: 1, // Number, (optional): default value is [1, infty). border width between frames.
    borderColor: new Uint8ClampedArray([255, 0, 0]), // Array, (optional): default value is [255, 0, 0]. color rgb of border
    showOverlayText: true, // Bool, (optional): default value is true. flag to show overlay text
    frameRowCount: 3 // Number or undefined, (optional): default value is undefined. range [1, infty). frame row count. if not set, calcuate by data length.
  }
}

tolerance: tolerance

optionsToolBar

An object that gives information about the initial state of the component toolbar.

source-js
optToolBar = {
  show: true, // Bool, (optional)
  pan: {
    show: true, // Bool, (optional)
    disabled: false // Bool, (optional)
  },
  zoom: {
    show: true, // Bool, (optional)
    disabled: false // Bool, (optional)
  },
  diff: {
    show: true, // Bool, (optional)
    ref: {
      show: true // Bool, (optional)
    },
    tolerance: {
      show: true // Bool, (optional)
    }
  }
}

API

  • openControlPanel: open Control panel.
  • resetState: reset to initial state.
  • setState: set new state.
  • getState: get current state.

event

  • onstatechange: vue-event raised when state change with state object. you can catch like this
text-html-basic
<vue-image-diff ... @onstatechange="listener" ... />

Control

  • left mouse & touch drag - panning
  • mouse wheel & pinch to zoom - zoom in / out
  • mouse doubleclick - change reference image for diff
  • right mouse drag - adjust brightness and contrast

Browser support - (tested)

  • Google Chrome 77+
  • Google Chrome 77+ on Android 9+
  • Mozilla FireFox 68+

Third-party libraries

Dependencies

Dev-Dependencies

  • @vue/cli-plugin-babel
  • @vue/cli-plugin-eslint
  • @vue/cli-service
  • babel-eslint
  • eslint
  • eslint-plugin-vue
  • vue-template-compiler

TO DO

  • support tiff, bmp and 16bit png format.
  • reduce library size.
  • add SSIM

Github

whwnsdlr1/vue-image-diff

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