encoding into image

img.js

// Function to encode secret data into image pixels
function encodeDataIntoImage(imageData, secretData) {
    // Assuming imageData is a Uint8ClampedArray representing pixel data of the image
    // and secretData is the string to be hidden
    
    // Convert secretData into binary
    let binarySecret = secretData.split('').map(char => char.charCodeAt(0).toString(2)).join('');

    // Embed binary data into least significant bits of image pixel values
    for (let i = 0; i < binarySecret.length; i++) {
        imageData[i] = (imageData[i] & 0xFE) | Number(binarySecret[i]);
    }

    return imageData;
}

// Usage example
let canvas = document.createElement('canvas');
let ctx = canvas.getContext('2d');
let image = new Image();

image.onload = function() {
    canvas.width = image.width;
    canvas.height = image.height;
    ctx.drawImage(image, 0, 0);
    
    let imageData = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
    let secretData = "This is a secret message.";

    // Embed secret data into image pixels
    let encodedImageData = encodeDataIntoImage(imageData, secretData);

    // Display the modified image
    ctx.putImageData(new ImageData(encodedImageData, canvas.width, canvas.height), 0, 0);

    // Append the canvas to the document or send it as part of an HTTP request
};

image.src = 'image.jpg';