在Cavnas内平移图像后获得完整的ImageData

var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');

var image = new Image();
image.onload = function() {
  canvas.width = image.width;
  canvas.height = image.height;
  ctx.drawImage(image, 0, 0);
};
image.src = 'image.jpg'; // 替换为实际图像的URL

var offsetX = 100; // 水平平移的像素偏移量
var offsetY = 50; // 垂直平移的像素偏移量

var translatedCanvas = document.createElement('canvas');
translatedCanvas.width = canvas.width;
translatedCanvas.height = canvas.height;
var translatedCtx = translatedCanvas.getContext('2d');

translatedCtx.drawImage(canvas, offsetX, offsetY);
var translatedImageData = translatedCtx.getImageData(0, 0, translatedCanvas.width, translatedCanvas.height);