Image Secret Revealer Tool

function processImage(originalImg, bitPlane = 0, channel = 'rgb') {
    // Create canvas to process the image
    const canvas = document.createElement('canvas');
    const ctx = canvas.getContext('2d');
    
    // Set canvas dimensions to match the original image
    canvas.width = originalImg.width;
    canvas.height = originalImg.height;
    
    // Draw the original image onto the canvas
    ctx.drawImage(originalImg, 0, 0);
    
    // Extract image data
    const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
    const data = imageData.data;
    
    // Ensure bitPlane is a valid integer between 0 and 7 (0 is Least Significant Bit - LSB)
    const plane = Math.max(0, Math.min(7, parseInt(bitPlane, 10) || 0));
    const mask = 1 << plane;
    
    const ch = channel.toLowerCase().trim();
    
    // Loop through all pixels and extract the desired bit plane to reveal hidden information (steganography)
    for (let i = 0; i < data.length; i += 4) {
        const r = data[i];
        const g = data[i+1];
        const b = data[i+2];
        
        // Extract the bit and scale it to 255 (visible) or 0 (black)
        const rBit = (r & mask) ? 255 : 0;
        const gBit = (g & mask) ? 255 : 0;
        const bBit = (b & mask) ? 255 : 0;
        
        if (ch === 'r' || ch === 'red') {
            data[i] = rBit;
            data[i+1] = rBit;
            data[i+2] = rBit;
        } else if (ch === 'g' || ch === 'green') {
            data[i] = gBit;
            data[i+1] = gBit;
            data[i+2] = gBit;
        } else if (ch === 'b' || ch === 'blue') {
            data[i] = bBit;
            data[i+1] = bBit;
            data[i+2] = bBit;
        } else {
            // Default to all channels (RGB)
            data[i] = rBit;
            data[i+1] = gBit;
            data[i+2] = bBit;
        }
        
        // Force alpha to 255 to ensure any revealed data is completely opaque and visible
        data[i+3] = 255; 
    }
    
    // Put the processed image data back onto the canvas
    ctx.putImageData(imageData, 0, 0);
    
    return canvas;
}