Imaging method, imaging device, rearview mirror and storage medium

Patent metadata

Field	Value
Publication number	US-10880490-B2
Application number	US-201916245364-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Apr 9, 2018
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

Provided are an imaging method, an imaging device, a rearview mirror and a storage medium. The imaging method includes: performing spot photometry on a first photometric area of a plurality of photometric areas divided from an image to be tested; and acquiring, according to a result of spot photometry on the first photometric area, a first target image corresponding to the image to be tested. By selecting an appropriate first photometric area to perform the spot photometry and then acquiring the first target image according to the result of spot photometry, the imaging of a target object contained in the first target image would be clearer since the photometric result of a spot photometry is more accurate and is not affected by other areas.

First claim

What is claimed is:

1. An imaging method, comprising:
performing spot photometry on a first photometric area of a plurality of photometric areas divided from an image to be tested, wherein the first photometric area is any one of the plurality of photometric areas; and
acquiring, according to a result of spot photometry on the first photometric area, a first target image corresponding to the image to be tested, the method further comprising:
when a target object is not detected in the first target image corresponding to the plurality of photometric areas, performing average photometry on an area with the highest brightness in the plurality of photometric areas;
acquiring, according to a result of average photometry on the area with the highest brightness, a second target image to be processed;
adjusting the brightness value of the second target image to be processed to obtain the second target image; and
outputting the second target image when the target object is detected in the second target image.

2. The method according to claim 1 , wherein said acquiring, according to a result of spot photometry on the first photometric area, the first target image corresponding to the image to be tested comprises:
determining an exposure value according to the result of spot photometry on the first photometric area; and
acquiring, based on the exposure value, the first target image corresponding to the image to be tested.

3. The method according to claim 2 , wherein said acquiring, based on the exposure value, the first target image corresponding to the image to be tested comprises:
determining an aperture value and a shutter speed based on the exposure value; and
acquiring, based on the aperture value and the shutter speed, a first target image corresponding to the image to be tested.

4. The method according to claim 1 , further comprising:
outputting the first target image when the target object is detected in the first target image.

5. The method according to claim 4 , further comprising:
when the target object is not detected in the first target image, replacing the first photometric area of the plurality of photometric areas, performing spot photometry on the replaced first photometric area, and acquiring, according to the result of spot photometry, the first target image.

6. The method according to claim 1 , further comprising:
when the target object is not detected in the second target image, selecting a designated photometric area from the plurality of photometric areas, and performing average photometry on the designated photometric area; and
acquiring and outputting a third target image according to a result of average photometry on the designated photometric area.

7. The method according to claim 1 , prior to said performing spot photometry on a first photometric area of a plurality of photometric areas divided from an image to be tested, further comprising:
judging whether the difference value between brightness values of any two imaging areas in the image to be tested is greater than a set threshold; and
when the difference value between brightness values of any two imaging areas is greater than the set threshold, switching a photometric mode to a spot photometric mode.

8. The method according to claim 1 , wherein the result of spot photometry on the first photometric area comprises: the brightness of light reflected by an object being shot in the first photometric area.

9. An imaging device, comprising:
one or more processors; and
a memory;
wherein the memory stores one or more programs configured to be executed by the one or more processors, and the one or more programs comprise instructions for performing the following operations of: performing spot photometry on a first photometric area of a plurality of photometric areas divided from an image to be tested, wherein the first photometric area is any one of the plurality of photometric areas; and
acquiring, according to a result of spot photometry on the first photometric area, a first target image corresponding to the image to be tested, wherein the one or more programs further comprise instructions for performing the following operations of:
when a target object is not detected in the first target image corresponding to the plurality of photometric areas, performing average photometry on an area with the highest brightness in the plurality of photometric areas;
acquiring, according to a result of average photometry on the area with the highest brightness, a second target image to be processed;
adjusting the brightness value of the second target image to be processed to obtain the second target image; and
outputting the second target image when the target object is detected in the second target image.

10. The device according to claim 9 , wherein the one or more programs comprise instructions for performing the following operations of:
determining an exposure value according to the result of spot photometry on the first photometric area; and
acquiring, based on the exposure value, the first target image corresponding to the image to be tested.

11. The device according to claim 10 , wherein the one or more programs comprise instructions for performing the following operations of:
determining an aperture value and a shutter speed based on the exposure value; and
acquiring, based on the aperture value and the shutter speed, a first target image corresponding to the image to be tested.

12. The device according to claim 9 , wherein the one or more programs further comprise instructions for performing the following operations of:
outputting the first target image when the target object is detected in the first target image.

13. The device according to claim 12 , wherein the one or more programs further comprise instructions for performing the following operations of:
when the target object is not detected in the first target image, replacing the first photometric area of the plurality of photometric areas, performing spot photometry on the replaced first photometric area, and acquiring, according to the result of spot photometry, the first target image.

14. The device according to claim 9 , wherein the one or more programs further comprise instructions for performing the following operations of:
when the target object is not detected in the second target image, selecting a designated photometric area from the plurality of photometric areas, and performing average photometry on the designated photometric area; and
acquiring and outputting a third target image according to a result of average photometry on the designated photometric area.

15. The device according to claim 9 , wherein the one or more programs further comprise instructions for performing the following operations of:
judging whether the difference value between brightness values of any two imaging areas in the image to be tested is greater than a set threshold; and
when the difference value between brightness values of any two imaging areas is greater than the set threshold, switching a photometric mode to a spot photometric mode.

16. The device according to claim 9 , wherein the result of spot photometry on the first photometric area comprises: the brightness of light reflected by an object being shot in the first photometric area.

17. A rearview mirror comprising an imaging device, wherein the imaging device comprises: one or more processors; and
a memory;
wherein the memory stores one or more programs configured to be executed by the one or more processors, and the one or more programs comprise instructions fo

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wu Ying
• Zhou Minbiao
• Chu Xiao

Classifications

• H04N23/71 Primary

  Circuitry for evaluating the brightness variation · CPC title

• H04N23/72

  Combination of two or more compensation controls · CPC title

• H04N23/61 Primary

  based on recognised objects · CPC title

• B60R1/083

  Anti-glare mirrors, e.g. "day-night" mirrors · CPC title

• H04N5/2351 Primary

  Electricity · mapped topic