Javascript 未捕获错误:索引大小错误:DOM异常1,getImageData
我正在使用以下代码将我的图像转换为灰度,在本地计算机上可以,但当我在服务器上部署相同的图像时,它会通过未捕获错误:INDEX\u SIZE\u ERR:DOM异常1我想知道这是由于不同的域造成的,我不确定,但问题是由于“getImageData”。而且,这个问题只存在于chrome上 我读了很多帖子,也尝试了很多,但似乎对我来说什么都不管用 先谢谢你Javascript 未捕获错误:索引大小错误:DOM异常1,getImageData,javascript,html,Javascript,Html,我正在使用以下代码将我的图像转换为灰度,在本地计算机上可以,但当我在服务器上部署相同的图像时,它会通过未捕获错误:INDEX\u SIZE\u ERR:DOM异常1我想知道这是由于不同的域造成的,我不确定,但问题是由于“getImageData”。而且,这个问题只存在于chrome上 我读了很多帖子,也尝试了很多,但似乎对我来说什么都不管用 先谢谢你 function grayscale(img) { var canvas = document.createElement('c
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();
}
功能灰度(img){
var canvas=document.createElement('canvas');
var ctx=canvas.getContext('2d');
var imgObj=新图像();
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);
对于(变量y=0;y
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();
};
}
//img是HTMLImageElement
函数makeGreyScale(img){
var canvas=document.createElement('canvas');
var ctx=canvas.getContext('2d');
var imgObj=新图像();
imgObj.src=img.src;
imgObj.onload=函数(){
canvas.width=imgObj.width;
canvas.height=imgObj.height;
ctx.drawImage(imgObj,0,0);
var imgPixels=ctx.getImageData(0,0,canvas.width,canvas.height);
对于(变量y=0;y
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();
};
}
//img是HTMLImageElement
函数makeGreyScale(img){
var canvas=document.createElement('canvas');
var ctx=canvas.getContext('2d');
var imgObj=新图像();
imgObj.src=img.src;
imgObj.onload=函数(){
canvas.width=imgObj.width;
canvas.height=imgObj.height;
ctx.drawImage(imgObj,0,0);
var imgPixels=ctx.getImageData(0,0,canvas.width,canvas.height);
对于(变量y=0;y
很可能您不是使用window.load调用脚本,而是使用on-DOM-load。我在使用灰度脚本时遇到了同样的问题。以下是对我有效的代码:
$(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();
}
$(窗口).load(函数(){
imageColorize();
});
//黑白图像的颜色
函数imageColorize(){
//淡入图像,这样就不会加载彩色“弹出”文档,然后再加载窗口
$(“.colorize img”).fadeIn(500);
//克隆图像
$('.colorize img')。每个(函数(){
var el=$(本);
css({“位置”:“绝对”}).wrap(“”.clone().addClass('img_grayscale').css({“位置”:“绝对”,“z索引”:“998”,“不透明度”:“0”}).insertBefore(el).queue(函数(){
var el=$(本);
el.parent().css({“width”:this.width,“height”:this.height});
el.dequeue();
});
this.src=灰度(this.src);
});
//淡入图像
$('.colorize img').mouseover(函数(){
$(this.parent().find('img:first').stop().animate({opacity:1},1000);
});
$('.colorize.img_grayscale').mouseout(函数(){
$(this.stop().animate({opacity:0},1000);
});
}
//灰度w画布法
函数灰度(src){
var canvas=document.createElement('canvas');
var ctx=canvas.getContext('2d');
var imgObj=新图像();
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);
对于(变量y=0;y
很可能您不是使用window.load调用脚本,而是使用on-DOM-load。我在使用灰度脚本时遇到了同样的问题。以下是对我有效的代码:
$(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();
}
$(窗口).load(函数(){
imageColorize();
});
//黑白图像的颜色
函数imageColorize(){
//淡入图像,这样就不会加载彩色“弹出”文档,然后再加载窗口
$(“.colorize img”).fadeIn(500);
//克隆图像
$('.colorize img')。每个(函数(){
var el=$(本);
el.css({“位置”:“绝对”}).wrap(“”.clone().addClass('img_grayscale').css({“位置”:“绝对”,“z索引”:“998”,“不透明度”:“0”})