ทำการเข้ารหัสและต้องถอดรหัสรูปภาพโดยใช้จาวาสคริปต์

// def encrypted_decrypted_image(image):
//    key = 48
//    count = 0
//    for index, value in enumerate(image):
//        count += 1
//        image[index] = value ^ key
//        if count == 10:
//            break
//    return image

function xorImage(imageBuffer, key=48){
  return imageBuffer.reduce((acc, value, index) => {
    if(index == 10) return acc;
    acc.push(value ^ key);
    return acc;
  }, [])
}

console.log(xorImage([1, 20, 3, 4, 5, 6, 7, 8, 9]))

const image = document.getElementById('image');
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
const width = image.width;
const height = image.height;

canvas.width = width;
canvas.height = height;

// Draw original image: 
context.drawImage(image, 0, 0, width, height);

// Transform the top half of the image (each pixel has 4 coordinates, RGB and alpha):
const maxTransformedCoords = width * Math.round(height / 2) * 4; 

// Avoid processing more than needed:
const requiredRows = Math.ceil(maxTransformedCoords / (width * 4));

// Get the pixel component values as an array:
const data = context.getImageData(0, 0, width, requiredRows).data;

// Your transform logic (with some changes):

const key = 48;

let count = 0;

const transformedData = data.map((value, i) => {    
  if (++count > maxTransformedCoords) return value;

  // Turn alpha coordinates opaque:
  // if ((i + 1) % 4 === 0) return 255;

  // Your logic:
  return value ** key;
});

// Turn the transformed data into an ImageData object:
const imageData = context.createImageData(width, requiredRows);
imageData.data.set(new Uint8ClampedArray(transformedData));

// Draw the transformed pixels:
context.putImageData(imageData, 0, 0);

// Display it on the page:
canvas.id = 'canvas';
document.body.append(canvas);

body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  font-family: monospace;
  overflow: hidden;
}

#image,
#canvas {
  border: 4px solid white;
  border-radius: 2px;
  box-shadow: 0 0 32px 0 rgba(0, 0, 0, .25);
  width: 150px;
  box-sizing: border-box;
  display: block;
  background: cyan;
}

#canvas {
  margin-left: 32px;
}

<img id="image" src="data:image/gif;base64,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" >