How to adjust beauty in vue

Vue is a popular JavaScript framework widely used in web development. It comes with some powerful tools and libraries built-in, making it easier to create high-performance web applications. In web applications, beauty functions are becoming more and more popular, and Vue can implement this function well.

The implementation of the beauty function usually requires image processing, adjusting brightness, contrast, color and other parameters to produce smoother, richer and clearer effects. There are many powerful image processing libraries in Vue, such as CamanJS, PICA, LuminanceJS, etc., which can easily implement beautification functions.

Below we will introduce how to use Vue to implement the beauty function. We will assume that we already have a basic Vue application, which includes an HTML template and related Vue components. Now we need to add beauty functionality.

Step One: Add a Beauty Control

We need to add a beauty control for users so that they can adjust the beauty parameters in the application. We will create a separate Vue component that will render the beauty control. We can use the v-model directive in Vue to bind beauty parameters. For example, the following code will create a simple beauty control:

<template>
  <div>
    <label for="brightness">亮度：</label>
    <input type="range" min="-100" max="100" v-model="brightness" id="brightness">
    <br>
    <label for="contrast">对比度：</label>
    <input type="range" min="-100" max="100" v-model="contrast" id="contrast">
    <br>
    <label for="saturation">饱和度：</label>
    <input type="range" min="-100" max="100" v-model="saturation" id="saturation">
  </div>
</template>
<script>
export default {
  data() {
    return {
      brightness: 0,
      contrast: 0,
      saturation: 0
    }
  }
}
</script>

This code will create 3 range input boxes, used to control "brightness", "contrast" and "saturation" respectively. When the value in the input box changes, the v-model directive binds the value to the corresponding component data attribute. We will use these data attributes to modify the beauty parameters of the image.

Step 2: Use CamnJS to process images

We choose CamnJS to implement the beautification function because it is a simple and easy-to-use image processing library. We can install CamnJS using npm, just run the following command in the terminal:

npm install caman --save

After installation we need to add the following code in the main.js file of the Vue application to use CamanJS:

import Vue from 'vue'
import Caman from 'caman'

Vue.prototype.$caman = Caman

Here we add the Caman object to the Vue prototype for use in components. Next, we will use this object when editing the image.

Step 3: Edit the image

We need to use beauty parameters to edit the image. The easiest way to edit an image is to use CamnJS's editing function CamanJS().crop() . We will use the following code to apply it to the image:

import caman from 'caman'

caman('#my-image', function() {
  this.brightness(10);
  this.contrast(-5);
  this.saturation(20);
  this.render();
});

Here we first picked an image with the ID "my - image" and then we used CamnJS's brightness, contrast and saturation functions to edit it . We can use other functions, such as brightness, hue, vividness, etc., to achieve more advanced beauty effects.

Step 4: Process the image in Vue

Now we need to integrate CamnJS with Vue to set up responsive functionality for the beauty controller in the application. To do this, we will add the following code in the Vue component where we have a rendering image:

<template>
  <div>
    <img :src="imageUrl" alt="my-image" id="my-image" ref="image">
    <beauty-controls></beauty-controls>
  </div>
</template>
<script>
import BeautyControls from './BeautyControls.vue'

export default {
  components: {BeautyControls},
  data() {
    return {
      imageUrl: 'https://picsum.photos/500/500'
    }
  },
  methods: {
    processImage() {
      const image = this.$refs.image;

      this.$caman(image, function() {
        this.revert(false); // 将图像重置为原始状态
        this.brightness(this.$parent.brightness);
        this.contrast(this.$parent.contrast);
        this.saturation(this.$parent.saturation);
        this.render();

      });
    }
  },
  mounted () {
    this.processImage();
    setInterval(this.processImage, 500);
  }
}
</script>

Here we first add an img element, which is used to render the image. We also added beautification controllers to the template so users can adjust beautification parameters.

We also define a method for processing images. This method uses $refs.image to reference the image and then edit it using CamnJS. We use the value of the beauty controller to inject the editing function into the image and render the result on the page. We use the setInterval() method so that our image renders immediately and updates the value when the beauty controller's value changes.

We use the $parent attribute to access the beauty controller data attributes. This property allows us to read all beauty parameters in the Vue parent component, thereby realizing real-time editing of images by the beauty controller.

Step 5: Improve the beauty function

We have successfully created the beauty controller and integrated it with CamnJS image editing logic in the Vue component. Therefore, we can add other beauty functions as needed, such as rotation, cropping, blurring, etc.

The following code shows how to implement the crop and blur functions:

import caman from 'caman'

this.$caman('#my-image', function() {
  // 剪裁图像
  this.crop(100, 100, 300, 300);
  // 模糊图像
  this.stackBlur(5);
  this.render();
});

In this example, we first crop the image using CamanJS's crop() function. We specify the coordinates and size of the area to be clipped. Then we add the blur effect using CamanJS’s stackBlur() function. Finally, we present the edited image.

Summary

The above is the whole process of how to use Vue to implement the beauty function. Vue provides powerful tools and frameworks that make web application development easier. Using Vue and CamnJS image editing library, we can simply implement beautification features to make the application more attractive and user-friendly.

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