来自HTML Canvas的getPixel？

// 获取画布并获取像素颜色值
const canvas = document.getElementById('myCanvas');
const ctx = canvas.getContext('2d');
const pixelIndex = 25;

const pixelColor = ctx.getPixel(canvas.width, pixelIndex);
console.log(pixelColor); // 输出颜色值，如RGB(255, 0, 0)

// 获取画布并获取像素颜色值
const canvas = document.getElementById('myCanvas');
const ctx = canvas.getContext('2d');
const pixelIndex = 25;

const pixelData = ctx.getImageData(0, 0, canvas.width, canvas.height);
const pixelColor = pixelData.data[pixelIndex];
console.log(pixelColor); // 输出颜色值，如RGB(255, 0, 0)