Adaptive Rearview Mirror Adjustment Method and Apparatus

Patent metadata

Field	Value
Publication number	US-2022017014-A1
Application number	US-202117489112-A
Country	US
Kind code	A1
Filing date	Sep 29, 2021
Priority date	Aug 31, 2019
Publication date	Jan 20, 2022
Grant date	—

Abstract

An adaptive rearview mirror adjustment method includes obtaining a spatial position of a human eye of a driver of a current vehicle and a spatial position of a target rearview mirror, obtaining a horizontal field of view of the driver in the target rearview mirror based on the spatial position of the human eye of the driver and a spatial position of a target rearview mirror, obtaining a next-vehicle image, obtaining a first auxiliary angle of a target next vehicle based on the next-vehicle image, calculating a second auxiliary angle based on the horizontal field of view, the spatial position of the human eye, and the position of the target rearview mirror, obtaining a horizontal adjustment angle of the target rearview mirror based on the first auxiliary angle and the second auxiliary angle, and adjusting a horizontal angle of the target rearview mirror based on the horizontal adjustment angle.

First claim

What is claimed is:

1 . An adaptive rearview mirror adjustment method, comprising:
obtaining a spatial position of a human eye of a driver of a current vehicle and a spatial position of a target rearview mirror of the current vehicle; obtaining a view field of the driver in the target rearview mirror based on the spatial position of the human eye and the spatial position of the target rearview mirror; calculating a first auxiliary angle based on the view field, the spatial position of the human eye, and the position of the target rearview mirror; obtaining an adjustment angle of the target rearview mirror based on the first auxiliary angle; and adjusting an angle of the target rearview mirror based on the adjustment angle.

2 . The adaptive rearview mirror adjustment method of claim 1 , wherein the view field is a horizontal view field, wherein the adjustment angle of the target rearview mirror is a horizontal adjustment angle, wherein obtaining the adjustment angle of the target rearview mirror comprises obtaining the horizontal adjustment angle based on the first auxiliary angle and a second auxiliary angle, and wherein adjusting the angle of the target rearview mirror comprises adjusting a horizontal angle of the target rearview mirror based on the horizontal adjustment angle.

3 . The adaptive rearview mirror adjustment method of claim 2 , wherein the method further comprises:
obtaining a next-vehicle image through a rearview camera of the current vehicle, wherein the next-vehicle image comprises a target next vehicle; obtaining the second auxiliary angle based on the next-vehicle image and a first reference point on the target rearview mirror.

4 . The adaptive rearview mirror adjustment method of claim 3 , wherein the second auxiliary angle is an angle formed between a first straight line and a second straight line, wherein the first straight line passes through the target next vehicle and the first reference point, wherein the second straight line passes through the first reference point and is perpendicular to the target rearview mirror, wherein the first auxiliary angle is an angle formed between a third straight line and a horizontal-view center line, wherein the third straight line passes through the position of the human eye of the driver and a second reference point, wherein the second reference point is an intersection between the horizontal-view center line and a mirror surface of the target rearview mirror, and wherein the horizontal-view center line is an angle bisector of the horizontal view field.

5 . The adaptive rearview mirror adjustment method of claim 1 , wherein the view field is a vertical view field, wherein the adjustment angle of the target rearview mirror is a vertical adjustment angle, wherein obtaining the adjustment angle of the target rearview mirror comprises obtaining the vertical adjustment angle of the target rearview mirror based on the first auxiliary angle and a sky-to-ground ratio R, and wherein adjusting the angle of the target rearview mirror comprises adjusting a vertical angle of the target rearview mirror based on the vertical adjustment angle.

6 . The adaptive rearview mirror adjustment method of claim 5 , further comprising:
obtaining a next-vehicle image through a rearview camera of the current vehicle, wherein the next-vehicle image comprises a target next vehicle; and obtaining the sky-to-ground ratio R based on the next-vehicle image.

7 . The adaptive rearview mirror adjustment method of claim 6 , wherein the first auxiliary angle is an angle formed between a vertical-view center line and a fifth straight line, wherein the fifth straight line passes through the spatial position of the human eye of the driver and a third reference point, wherein the third reference point is a point on the target rearview mirror, and wherein the center line of the vertical view is an angle bisector of the vertical view field.

8 . The adaptive rearview mirror adjustment method of claim 6 , wherein obtaining the sky-to-ground ratio R comprises:
dividing the next-vehicle image longitudinally into a plurality of image strips; obtaining a target image strip from the plurality of image strips, wherein the target image strip is an image strip with continuous transition between sky and ground in the plurality of image strips; counting a quantity of pixels occupied by the sky and a quantity of pixels occupied by the ground in the target image strip; and calculating the sky-to-ground ratio R based on the quantity of pixels occupied by the sky and the quantity of pixels occupied by the ground, wherein the sky-to-ground ratio R is a ratio of the quantity of pixels occupied by the sky to the quantity of pixels occupied by the ground.

9 . An adaptive rearview mirror adjustment apparatus, comprising:
a memory configured to store instructions; and a processor coupled to the memory, wherein the instructions when executed by the processor cause the apparatus to:
obtain a spatial position of a human eye of a driver of a current vehicle and a spatial position of a target rearview mirror of the current vehicle;
obtain a view field of the driver in the target rearview mirror based on the spatial position of the human eye and the spatial position of the target rearview mirror;
calculate a first auxiliary angle based on the view field, the spatial position of the human eye, and the position of the target rearview mirror;
obtain an adjustment angle of the target rearview mirror based on the first auxiliary angle; and
adjust an angle of the target rearview mirror based on the adjustment angle.

10 . The adaptive rearview mirror adjustment apparatus of claim 9 , wherein the view field is a horizontal view field, wherein the adjustment angle of the target rearview mirror is a horizontal adjustment angle, and wherein the instructions further cause the apparatus to:
obtain the horizontal adjustment angle based on the first auxiliary angle and a second auxiliary angle; and adjust the angle of the target rearview mirror by adjusting a horizontal angle of the target rearview mirror based on the horizontal adjustment angle.

11 . The adaptive rearview mirror adjustment apparatus of claim 10 , wherein the instructions further cause the apparatus to:
obtain a next-vehicle image through a rearview camera of the current vehicle, wherein the next-vehicle image comprises a target next vehicle; and obtain the second auxiliary angle based on the next-vehicle image and a first reference point on the target rearview mirror.

12 . The adaptive rearview mirror adjustment apparatus of claim 11 , wherein the second auxiliary angle is formed between a first straight line and a second straight line, wherein the first straight line passes through the target next vehicle and the first reference point, wherein the second straight line passes through the first reference point and is perpendicular to the target rearview mirror, wherein the first auxiliary angle is formed between a third straight line and a horizontal-view center line, wherein the third straight line passes through the position of the human eye of the driver and a second reference point, wherein the second reference point is an intersection between the horizontal-view center line and a mirror surface of the target rearview mirror, and wherein the horizontal-view center line is an angle bisector of the horizontal view field.

13 . The adaptive rearview mirror adjustment apparatus of claim 11 , wherein the next-vehicle image comprises M vehicles, wherein M is an integer greater than or equal to 1, and wherein the instructions further cause the apparatus to:
obtain a vehi

Assignees

• Huawei Tech Co Ltd

Inventors

• He yanshan
• Huang Wei
• Xu Wenkang
• Zhang Junhao

Classifications

• B60R1/025 Primary

  comprising special mechanical means for correcting the field of view in relation to particular driving conditions, e.g. change of lane; scanning mirrors · CPC title

• B60R1/072 Primary

  for adjusting the mirror relative to its housing · CPC title

• G06F3/013

  Eye tracking input arrangements (G06F3/015 takes precedence) · CPC title

• G06V20/584

  of vehicle lights or traffic lights · CPC title

• G06F17/10

  Complex mathematical operations {(function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544)} · CPC title