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Asked: 2026-06-17T09:30:02+00:00

I am trying to manipulate pixels on a html5 canvas. With the method getImageData

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I am trying to manipulate pixels on a html5 canvas. With the method getImageData I only get a Uint8Array with RGBA values of the canvas.
Is there a possibility to get array with more precision? I would like to manipulate all 16bit color values of the picture.

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1 Answer

  1. Editorial Team

    No, since the color space of a canvas context must match the color space of the CSS color values:

    In user agents that support CSS, the color space used by a canvas element must match the color space used for processing any colors for that element in CSS.

    Also the current specification of ImageData provides only a 8bit array:

    interface ImageData {
  readonly attribute unsigned long width;
  readonly attribute unsigned long height;
  readonly attribute Uint8ClampedArray data;
};

    References

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