MagicCrop is a JavaScript library to automatically detect and extracts an image from a screenshot. This library attempts to automate the process. Give it a screenshot containing an image, and it will magically detect the image’s cropped boundaries and output a new HTML element containing the cropped image.

The algorithm is app/image neutral and has been tested using screenshots taken from many different apps.

Disable Printing, Screenshot, Copy and Paste in HTML JavaScript | NoPrint.js

How to make use of it:

1. Link to the main javascript file “magicCrop.js”:

<script src="src/magicCrop.js"></script>

2. Create an empty “img” tag to place the original screenshot image.

<img id="original"/>

3. Create a blank item to place the cropped image.

<div id="cropTarget"></div>

var demoUrl = 'test/images/guardian.png';
    document.getElementById('original').src = demoUrl;
    var magicCrop = new MagicCrop();
function runDemo() {
    // load the url into a new image object and wait for it to load
    var imageElem = new Image();
    imageElem.src = demoUrl;
    imageElem.onload = function () {
        doCrop(imageElem);
    }
}
function doCrop(imageElem) {
    // calculate the cropping bounds
    var imageData = magicCrop.getImageData(imageElem);
    var bound = magicCrop.calcCroppingBounds(imageData.data.buffer, imageData.width, imageData.height);
    // perform the crop
    var croppedCanvas = magicCrop.cropToCanvas(imageElem, bound);
    // render the cropped image back to the page
    var croppedImage = new Image();
    croppedImage.src = croppedCanvas.toDataURL('image/png');
    document.getElementById('cropTarget').appendChild(croppedImage);
    document.getElementById('cropButton').style.display = 'none';
}

4. Extract image from image “guardian.png”:

runDemo()

Extract Photo From Screenshot, MagicCrop Plugin/Github

See Demo And Download

Official Website(mikechamberlain): Click Here

This superior jQuery/javascript plugin is developed by mikechamberlain. For extra advanced usage, please go to the official website.