Uncaught SecurityError: Failed to execute 'getImageData' on 'CanvasRenderingContext2D': The canvas has been tainted by cross-origin data

Question

I am getting this error in Chrome and Opera Browsers:

Uncaught SecurityError: Failed to execute \'getImageData\' on \'CanvasRenderingContext2D\': The canvas          


        

Answer 1

When you load your html file from disk using: file://path/to/your/file.html, then Google Chrome and Opera will raise error at line including: imgData = ctx.getImageData(x1,y1,w,h);

Solution is simple: start web server (apache, nginx) put your html file somewhere at web server and load your html file from: http://localhost/somewhere/file.html

Answer 2

May be this will help, as you have mentioned cross origin so try this,

 var UimageObj = new Image();

crossOrigin has to be set to enable the canvas data to be saved.The source image should have access-control-allow-origin set to * or a chosen domain

UimageObj.crossOrigin = 'anonymous';   // crossOrigin attribute has to be set before setting src.If reversed, it wont work.  
UimageObj.src = obj_data.srcUser;

Hope it helps.