How to achieve inverse color and exposure adjustment of pictures in Vue?

How to invert the color and adjust the exposure of images in Vue?

In Vue development, we often encounter situations where images need to be processed. Two common requests are color inversion and exposure adjustment. This article will introduce how to use Vue and some commonly used tool libraries to implement these two functions, and provide corresponding code examples for reference.

1. Picture color inversion processing

Picture color inversion processing refers to inverting the color in the original picture, that is, the color value of each pixel becomes its complementary color. In order to achieve this function, we can use CSS3 filter effects to process images.

First, introduce the image that needs to be processed in the Vue component, and add a unique id to it so that it can be selected in the style:

<template>
  <div>
    <img  src="/static/imghwm/default1.png"  data-src="imageSrc"  class="lazy"  : :id="imageId" / alt="How to achieve inverse color and exposure adjustment of pictures in Vue?" >
  </div>
</template>

<script>
export default {
  data() {
    return {
      imageSrc: "your_image_url",
      imageId: "myImage",
    };
  },
};
</script>

Then, use the filter effect in the style To achieve inverse color processing:

<style scoped>
#myImage {
  filter: invert(100%);
}
</style>

In this way, the image will have an inverse color effect.

2. Picture Exposure Adjustment

Picture exposure adjustment refers to changing the brightness of the picture to make it look brighter or darker. In order to achieve this function, we can use tool libraries such as CamanJS to process images.

First, introduce CamanJS into the Vue component, initialize the CamanJS instance and process the image in the mounted life cycle:

<template>
  <div>
    <img  src="/static/imghwm/default1.png"  data-src="imageSrc"  class="lazy"  : ref="myImage" / alt="How to achieve inverse color and exposure adjustment of pictures in Vue?" >
  </div>
</template>

<script>
import Caman from "caman";

export default {
  data() {
    return {
      imageSrc: "your_image_url",
    };
  },
  mounted() {
    this.adjustExposure();
  },
  methods: {
    adjustExposure() {
      const image = this.$refs.myImage;

      Caman(image, function() {
        this.exposure(-10); // 调整曝光度，-10表示降低曝光度
        this.render();
      });
    },
  },
};
</script>

In the above code, use the Caman function to associate the image with the processing function. And adjust the exposure by calling the exposure method. The -10 here means reducing the exposure, you can adjust the parameters as needed.

Through the above operations, the exposure of the picture will be adjusted.

Summary:

This article uses Vue and related tool libraries to implement the image inversion and exposure adjustment functions. The image inversion can be achieved through the filter effect of CSS3, and the exposure of the image can be adjusted through CamajJS. You can choose the appropriate method according to your actual needs and use it according to the code examples in the article. Hope this article is helpful to you!

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