未捕获的错误:INDEX_SIZE_ERR: DOM Exception 1, getImageData

Uncaught Error: INDEX_SIZE_ERR: DOM Exception 1, getImageData

本文关键字：Exception DOM getImageData ERR SIZE 错误 INDEX      更新时间：2023-09-26

我使用以下代码将我的图像转换为灰度，在本地机器上它很好，但当我在服务器上部署相同时，它通过未捕获错误:INDEX_SIZE_ERR: DOM异常1我想知道它是由于不同的域，我不确定，但问题是由于"getImageData"。此外，这个问题只在chrome上。

我读了很多帖子，也尝试了很多，但似乎没有什么对我有用。

Thanks in Advance…

function grayscale(img) {
         var canvas = document.createElement('canvas');
         var ctx = canvas.getContext('2d');
         var imgObj = new Image();
         imgObj.src = img;
         canvas.width = imgObj.width;
         canvas.height = imgObj.height;
         ctx.drawImage(imgObj, 0, 0);
         var imgPixels = ctx.getImageData(0, 0, canvas.width, canvas.height);
         for (var y = 0; y < imgPixels.height; y++) {
         for (var x = 0; x < imgPixels.width; x++) {
         var i = (y * 4) * imgPixels.width + x * 4;
         var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
                    imgPixels.data[i] = avg;
                    imgPixels.data[i + 1] = avg;
                    imgPixels.data[i + 2] = avg;
                }
            }
            ctx.putImageData(imgPixels, 0, 0, 0, 0, imgPixels.width, imgPixels.height);
            return canvas.toDataURL();
        }

这对我来说很好

// img is HTMLImageElement
function makeGreyScale(img) {
  var canvas = document.createElement('canvas');
  var ctx = canvas.getContext('2d');
  var imgObj = new Image();
  imgObj.src = img.src;
  imgObj.onload = function(){
    canvas.width = imgObj.width;
    canvas.height = imgObj.height;
    ctx.drawImage(imgObj, 0, 0);
    var imgPixels = ctx.getImageData(0, 0, canvas.width, canvas.height);
    for(var y = 0; y < imgPixels.height; y++){
      for(var x = 0; x < imgPixels.width; x++){
        var i = (y * 4) * imgPixels.width + x * 4;
        var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
        imgPixels.data[i] = avg;
        imgPixels.data[i + 1] = avg;
        imgPixels.data[i + 2] = avg;
      }
    }
    ctx.putImageData(imgPixels, 0, 0, 0, 0, imgPixels.width, imgPixels.height);
    img.src= canvas.toDataURL();
  };
}

很可能您没有使用窗口调用脚本。加载，而不是使用DOM加载。我在使用灰度脚本时遇到了同样的问题。下面是为我工作的代码:

$(window).load(function(){
    imageColorize();
});

//Black and white images to color
function imageColorize(){
    // Fade in images so there isn't a color "pop" document load and then on window load
    $(".colorize img").fadeIn(500);
    // clone image
    $('.colorize img').each(function(){
        var el = $(this);
        el.css({"position":"absolute"}).wrap("<div class='img_wrapper' style='display: inline-block'>").clone().addClass('img_grayscale').css({"position":"absolute","z-index":"998","opacity":"0"}).insertBefore(el).queue(function(){
            var el = $(this);
            el.parent().css({"width":this.width,"height":this.height});
            el.dequeue();
        });
        this.src = grayscale(this.src);
    });
    // Fade image
    $('.colorize img').mouseover(function(){
        $(this).parent().find('img:first').stop().animate({opacity:1}, 1000);
    });
    $('.colorize .img_grayscale').mouseout(function(){
        $(this).stop().animate({opacity:0}, 1000);
    });
}
// Grayscale w canvas method
function grayscale(src){
    var canvas = document.createElement('canvas');
    var ctx = canvas.getContext('2d');
    var imgObj = new Image();
    imgObj.src = src;
    canvas.width = imgObj.width;
    canvas.height = imgObj.height;
    ctx.drawImage(imgObj, 0, 0);
    var imgPixels = ctx.getImageData(0, 0, canvas.width, canvas.height);
    for(var y = 0; y < imgPixels.height; y++){
        for(var x = 0; x < imgPixels.width; x++){
            var i = (y * 4) * imgPixels.width + x * 4;
            var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
            imgPixels.data[i] = avg;
            imgPixels.data[i + 1] = avg;
            imgPixels.data[i + 2] = avg;
        }
    }
    ctx.putImageData(imgPixels, 0, 0, 0, 0, imgPixels.width, imgPixels.height);
    return canvas.toDataURL();
}

我刚刚在IE9, IE10中遇到了类似的问题。

我建议使用，在您的情况下(动态创建图像对象):

imgObj.naturalWidth;
imgObj.naturalHeight;

代替

imgObj.width;
imgObj.height;
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