image-comparator

image-comparator

Compares images by resizing and checking color match without external dependencies

Install

npm install --save image-comparator

Test

npm test

Example

const fs = require("node:fs");
const comparator = require("image-comparator");

const imagePath1 = "path/to/image1.png";
const imagePath2 = "path/to/image2.png";

const imageBuffer1 = fs.readFileSync(imagePath1);
const imageBuffer2 = fs.readFileSync(imagePath2);

const areSame = await comparator.compare(imageBuffer1, imageBuffer2);

if (areSame) {
  console.log("Images are the same");
} else {
  console.log("Images are different");
}

Supported formats

• png
• jpg

Detection algorithm

1. Retrieve dimensions and bitmap data from the input image buffers
2. Resize the images to a consistent mini size
3. Compare the resized images using the areBuffersEqual function

Notes

May produce false positives for comparison of images of different format origins due to inconsistent resulting bitmap size