标签云:oColorImg = aImages[nImgId], nWidth = oColorImg,offsetWidth, nHeight = oColorImg,offsetHeight, oCanvas,width = nWidth, oCanvas,height = nHeight, oCtx,drawImage(oColorImg, 0, 0), oImgData = oCtx,getImageData(0, 0, nWidth, nHeight), aPix = oImgData,data, nPixLen = aPix,length