US Patent 12094378 Head-mountable display (HMD) image and foveal region brightness computation

A computing device is configured to downsample an image that is displayable at a head-mountable display (HMD) to an image pixel representative of the image. The computing device computes a luminance of the image pixel from a color value of the image pixel to determine image brightness. The computing device is configured to determine the foveal region of the image from eye-tracking information of the user of the HMD. The computing device dowsamples the foveal region of the image to a foveal pixel representative of the foveal region. The computing device is configured to compute a luminance of the foveal pixel from a color value of the foveal pixel to determine foveal region brightness.