Granted Patent B2

US 12,555,349 · App. 18/162,722 · Granted Feb 17, 2026

Inventor: Tzu-Peng Chang (New Taipei, TW)

Assignee: Wistron Corporation

G06V10/60G06T7/194G06V10/25G06V10/761G06T2207/10024G06T2207/10144G06T2207/30196

Abstract

Claims (49)

1 . An image processing apparatus, comprising:

a first image capturing apparatus, capturing a color image;

a second image capturing apparatus, capturing a grayscale image and a background grayscale image;

a storage apparatus, storing a plurality of program modules; and

a processor, coupled to the first image capturing apparatus, the second image capturing apparatus, and the storage apparatus, wherein the processor:

obtains a reference area according to the grayscale image;

calculates a luminance value according to the color image and the reference area;

compares the grayscale image to the background grayscale image, and the reference area is obtained;

adjusts luminance of the color image according to the luminance value;

in response to the luminance value being less than a preset luminance, adjusts the luminance of the color image to the preset luminance; and

outputs the adjusted color image.

2 . The image processing apparatus according to claim 1 , wherein the processor further:

removes the background grayscale image from the grayscale image, and the reference area is obtained.

3 . The image processing apparatus according to claim 1 , wherein the reference area is an area of a human image.

4 . The image processing apparatus according to claim 3 , wherein the processor further:

in response to the luminance value being greater than the preset luminance, maintains the luminance of the color image.

5 . The image processing apparatus according to claim 1 , wherein the reference area is an area of a light image, and the processor further:

in response to the luminance value being greater than or equal to a threshold value, reduces luminance of a pixel position corresponding to the reference area in the color image.

6 . The image processing apparatus according to claim 5 , wherein the processor further:

in response to the luminance value being less than the threshold value, maintains the luminance of the pixel position corresponding to the reference area in the color image.

7 . The image processing apparatus according to claim 5 , wherein the processor further:

sets the luminance of the pixel position corresponding to the reference area in the color image to a preset light luminance.

8 . The image processing apparatus according to claim 5 , wherein the processor further:

removes the luminance of the pixel position corresponding to the reference area in the color image.

9 . The image processing apparatus according to claim 5 , wherein the processor further:

performs auto-exposure (AE) on the color image again, and the luminance of the color image is adjusted.

10 . An image processing method, comprising:

obtaining a reference area from a grayscale image, comprises

capturing a background grayscale image; and

comparing the grayscale image to the background grayscale image, and the reference area being obtained;

calculating a luminance value according to a color image and the reference area;

adjusting luminance of the color image according to the luminance value;

in response to the luminance value being less than a preset luminance, adjusting the luminance of the color image to the preset luminance; and

outputting the adjusted color image.

11 . The image processing method according to claim 10 , wherein comparing the grayscale image to the background grayscale image to obtain the reference area comprises:

removing the background grayscale image from the grayscale image, and the reference area being obtained.

12 . The image processing method according to claim 10 , wherein the reference area is an area of a human image.

13 . The image processing method according to claim 12 , wherein adjusting the luminance of the color image according to the luminance value further comprises:

in response to the luminance value being greater than the preset luminance, maintaining the luminance of the color image.

14 . The image processing method according to claim 10 , wherein the reference area is an area of a light image, and adjusting the luminance of the color image according to the luminance value comprises:

in response to the luminance value being greater than or equal to a threshold value, reducing luminance of a pixel position corresponding to the reference area in the color image.

15 . The image processing method according to claim 14 , wherein adjusting the luminance of the color image according to the luminance value further comprises:

in response to the luminance value being less than the threshold value, maintaining the luminance of the pixel position corresponding to the reference area in the color image.

16 . The image processing method according to claim 14 , wherein reducing the luminance of the pixel position corresponding to the reference area in the color image comprises:

setting the luminance of the pixel position corresponding to the reference area in the color image to a preset light luminance.

17 . The image processing method according to claim 14 , wherein reducing the luminance of the pixel position corresponding to the reference area in the color image comprises:

removing the luminance of the pixel position corresponding to the reference area in the color image.

18 . The image processing method according to claim 14 , wherein adjusting the luminance of the color image according to the luminance value further comprises:

performing auto-exposure (AE) on the color image again, and the luminance of the color image being adjusted.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (34)