AUTOMATED COLOR SELECTION FOR FOCUS PEAKING HIGHLIGHTING

1 . A method, comprising:

accessing a color image including a first component image, a second component image, and a third component image that each encode a dimension of a color space used to encode the color image;

selecting pixels of the color image for focus peaking highlighting based on pixel values of the first component image; and

determining a color for focus peaking highlighting based on the second component image and on the third component image.

2 . The method of claim 1 , wherein determining the color for focus peaking highlighting comprises:

determining a first average for pixel values of the second component image;

determining a second average for pixel values of the third component image;

determining an angle based on the first average and the second average; and

determining the color for focus peaking highlighting based on the angle.

3 . The method of claim 2 , wherein the color for focus peaking highlighting is determined to be rotated 180 degrees from the angle in a plane of the color space with dimensions corresponding to the second component image and the third component image.

4 . The method of claim 2 , wherein the color for focus peaking highlighting is determined to be rotated 90 degrees from the angle in a plane of the color space with dimensions corresponding to the second component image and the third component image.

5 . The method of claim 2 , wherein the angle is quantized to a nearest angle from a discrete set of supported angles in a plane of the color space with dimensions corresponding to the second component image and the third component image and each supported angle is mapped to a color for focus peaking highlighting that contrasts well with the colors corresponding to the angle.

6 . The method of claim 2 , wherein only the selected pixels of the color image are used to compute the first average and the second average.

7 . The method of claim 1 , further comprising:

applying focus peaking highlighting, of the color for focus peaking highlighting, to the selected pixels of the color image to obtain a highlighted image.

8 . The method of claim 1 , wherein the color image is a frame video in a sequence of frames of video, and further comprising:

applying focus peaking highlighting, of a color determined based on an earlier frame in the sequence of frames of video, to the selected pixels of the color image to obtain a first highlighted frame of video; and

applying focus peaking highlighting, of the color for focus peaking highlighting, to selected pixels of a later frame in the sequence of frames of video to obtain a second highlighted frame of video.

9 . The method of claim 1 , wherein the first component image encodes luminance pixel values, the second component image encodes a first chrominance channel of the color image, and the third component image encodes a second chrominance channel of the color image.

10 . A system, comprising:

an image sensor, and

a processing apparatus configured to:

access a color image, captured using the image sensor, including a first component image, a second component image, and a third component image that each encode a dimension of a color space used to encode the color image;

select pixels of the color image for focus peaking highlighting based on pixel values of the first component image; and

determine a color for focus peaking highlighting based on the second component image and on the third component image.

11 . The system of claim 10 , wherein the processing apparatus is configured to:

determine a first average for pixel values of the second component image;

determine a second average for pixel values of the third component image;

determine an angle based on the first average and the second average; and

determine the color for focus peaking highlighting based on the angle.

12 . The system of claim 11 , wherein the color for focus peaking highlighting is determined to be rotated 180 degrees from the angle in a plane of the color space with dimensions corresponding to the second component image and the third component image.

13 . The system of claim 11 , wherein the color for focus peaking highlighting is determined to be rotated 90 degrees from the angle in a plane of the color space with dimensions corresponding to the second component image and the third component image.

14 . The system of claim 11 , wherein the angle is quantized to a nearest angle from a discrete set of supported angles in a plane of the color space with dimensions corresponding to the second component image and the third component image and each supported angle is mapped to a color for focus peaking highlighting that contrasts well with the colors corresponding to the angle.

15 . The system of claim 11 , wherein only the selected pixels of the color image are used to compute the first average and the second average.

16 . The system of claim 10 , further comprising a display, and wherein the processing apparatus is configured to:

apply focus peaking highlighting, of the color for focus peaking highlighting, to the selected pixels of the color image to obtain a highlighted image; and

present the highlighted image using the display.

17 . The system of claim 10 , further comprising a display, and wherein the color image is a frame video in a sequence of frames of video, and wherein the processing apparatus is configured to:

apply focus peaking highlighting, of a color determined based on an earlier frame in the sequence of frames of video, to the selected pixels of the color image to obtain a first highlighted frame of video;

apply focus peaking highlighting, of the color for focus peaking highlighting, to selected pixels of a later frame in sequence of frames of video to obtain a second highlighted frame of video; and

present a video including the first highlighted frame of video and the second highlighted frame of video using the display.

18 . The system of claim 10 , wherein the first component image encodes luminance pixel values, the second component image encodes a first chrominance channel of the color image, and the third component image encodes a second chrominance channel of the color image.

19 . A non-transitory computer-readable storage medium storing executable instructions that, when executed by a processor, cause performance of operations, comprising operations to:

access a color image including a first component image, a second component image, and a third component image that each encode a dimension of a color space used to encode the color image;

select pixels of the color image for focus peaking highlighting based on pixel values of the first component image; and

determine a color for focus peaking highlighting based on the second component image and on the third component image.

20 . The non-transitory computer-readable storage medium of claim 19 , wherein determining the color for focus peaking highlighting comprises operations to:

determine a first average for pixel values of the second component image;

determine a second average for pixel values of the third component image;

determine an angle based on the first average and the second average; and

determine the color for focus peaking highlighting based on the angle.