How to achieve mosaic and blur effects of images in Vue?

How to achieve mosaic and blur effects of images in Vue?

Mosaic and blur effects are common image processing methods. They can make images more artistic and have special effects. It is relatively simple to implement these effects in Vue. We can use the HTML5 canvas element and some third-party libraries to achieve it. This article will introduce the implementation method from two aspects: mosaic and blur, and attach corresponding code examples.

1. To achieve the mosaic effect of images

1. Install and introduce the third-party library pixi.js in the Vue project:

npm install pixi.js --save

import * as PIXI from 'pixi.js'

2. Create A Vue component and add a canvas element to the template:

<template>
  <div>
    <canvas ref="canvas"></canvas>
  </div>
</template>

3. In the mounted hook function of the Vue component, use pixi.js to create a canvas object, And load the image:

mounted() {
  const canvas = this.$refs.canvas;
  const app = new PIXI.Application({
    view: canvas,
    width: 500,
    height: 500,
    transparent: true,
  });
  
  PIXI.Loader.shared.add('image', 'path/to/your/image.jpg').load((loader, resources) => {
    const sprite = new PIXI.Sprite(resources.image.texture);
    sprite.width = app.view.width;
    sprite.height = app.view.height;
    
    const filter = new PIXI.filters.PixelateFilter();
    sprite.filters = [filter];
    
    app.stage.addChild(sprite);
    app.ticker.add(() => app.render());
  });
}

In the above code, a PIXI.Application object is first created and the canvas element is passed in. Then, use PIXI.Loader to load image resources, and use PIXI.Sprite to create a sprite object and set it to full screen display. Next, a PIXI.filters.PixelateFilter object is created and applied to the sprite object to achieve a mosaic effect. Finally, add the sprite object to the stage and listen to the rendering event through the app.ticker.add method so that the canvas can be dynamically updated.

2. To achieve the blur effect of images

1. Install and introduce the third-party library blur.js into the Vue project:

npm install blur.js --save

import Blur from 'blur.js'

2. Create A Vue component and add a picture element to the template:

<template>
  <div>
    <img src="/static/imghw/default1.png"  data-src="path/to/your/image.jpg"  class="lazy"  ref="image" alt="image">
  </div>
</template>

3. In the mounted hook function of the Vue component, use blur.js to add blur to the picture element Effect:

mounted() {
  const image = this.$refs.image;
  
  const blur = new Blur({
    image,
    radius: 10,
  });
  
  blur.init();
}

In the above code, the reference to the image element is first obtained. Then, a Blur object is created and the image element and blur radius are passed in. By calling the blur.init method, you can add a blur effect to the image element.

Summary:

This article introduces the methods of achieving image mosaic and blur effects in Vue, and gives corresponding code examples. By using the third-party libraries pixi.js and blur.js, we can easily achieve these effects. Hope this article is helpful to you!

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