The same picture on ios and android Gets the RGB different about rgbaster.js

[AlfredJKwack]

Hi @sivii thanks for bringing this to our attention.

Would you mind posting a screen grab of the results as provided by this CodePen?

I'm not sure there is much we can do about this but it's would be great to record instances for further analysis. The differences are most probably due inherent differences between browsers.

At a technical level, the same HTML5 Canvas element can produce exceptional pixels on a different web browsers, depending on the system on which it was executed. This happens for several reasons:

• at the image format level: web browsers uses different image processing engines, export options, compression level, final images may got different hashes even if they are pixel-perfect
• at the pixmap level — operating systems use different algorithms and settings for anti-aliasing and sub-pixel rendering.

There is more information available on BrowserLeaks.com if you're interested in the topic.

Here's a grab from Chrome on MacOS using the above CodePen

And one from iOS with the same CodePen