Disable to download image from canvas

Question

I added image to canvas element, but visitor than can save that image to local comp. Is there any way to disable that option? I don\'t know, putting some transparent image o

Answer 1

I found this question in review of an HTML5 captcha alternative I'm developing. My goal is not to "prevent" users from downloading the image as much as blocking OCR on the image capture. To prevent it, I added a onclick event to the canvas object that resets the canvas element on click. The user can "download" it, but it no longer is the original code presented.