Method and system for auto-setting of cameras

Patent metadata

Field	Value
Publication number	US-11943541-B2
Application number	US-202217668252-A
Country	US
Kind code	B2
Filing date	Feb 9, 2022
Priority date	Jul 3, 2017
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

At least one embodiment of a method for setting camera parameters of a camera, the method comprising:obtaining a first set of image characteristic values of images captured by the camera at a first lighting condition, the image characteristics being dependent on the camera parameters, at least two image characteristic values of the first set respectively corresponding to at least two different values of a same camera parameter;determining at least one second set of image characteristic values by adapting values of the obtained first set of image characteristic values from images captured by the camera at at least one second lighting condition, at least two image characteristic values of the second set respectively corresponding to at least two different values of a same camera parameter;selecting camera parameter values, based on the determined at least one second set of image characteristics; andmodifying settings of the camera as a function of the selected values.

First claim

The invention claimed is:

1. A method of controlling setting for a camera, the method comprising:
learning a first function representing a relationship between a plurality of image characteristic values and camera parameter values including a gain value and a shutter speed value at a first lighting condition, wherein the plurality of image characteristic values include at least one of a noise value, a blur value and a contrast value;
calibrating a second function by adapting the first function to a second lighting condition based on a plurality of image characteristic values at the second lighting condition and the first function;
selecting camera parameter values for the second lighting condition based on the calibrated second function; and
setting the camera according to the selected camera parameter values.

2. The method of claim 1 , wherein the first function is learned in accordance with image characteristic values included in the plurality of image characteristic values corresponding to change of at least one of the camera parameter values.

3. The method of claim 1 , wherein the first function is a function for calculating a quality value of an image captured by the camera at the first lighting condition, and
the second function is a function for calculating a quality value of an image captured by the camera at the second lighting condition different from the first lighting condition.

4. The method of claim 3 , wherein the camera parameter values are selected based on the quality value obtained by the second function.

5. The method of claim 1 , wherein the first function and the second function are learned in accordance with a mission chosen by a user.

6. The method of claim 5 , wherein the mission is represented by a scene-dependent parameter containing a target size and a target velocity.

7. The method of claim 1 , wherein the calibrating comprises determining relationships between at least one of the plurality of image characteristic values and at least one of the camera parameter values.

8. The method of claim 1 , wherein the calibrating comprises determining relationships between conditions and at least one of the camera parameter values.

9. The method of claim 8 , wherein the determining comprises determining relationships between the first lighting condition and the second lighting condition as a function of at least one of the camera parameter values.

10. A non-transitory computer-readable storage medium storing instructions of a computer program for implementing the method according to claim 1 .

11. A device for controlling setting for a camera, the device comprising a microprocessor configured for carrying out the steps of:
learning a first function representing a relationship between a plurality of image characteristic values and camera parameter values including a gain value and a shutter speed value at a first lighting condition, wherein the plurality of image characteristic values include at least one of a noise value, a blur value and a contrast value;
calibrating a second function by adapting the first function to a second lighting condition based on the plurality of image characteristic values at the second lighting condition and the first function;
selecting camera parameter values for the second lighting condition based on the calibrated second function; and
setting the camera according to the selected camera parameter values.

Assignees

• Canon Kk

Inventors

• Citerin Johann
• Kergourlay Gérald
• Visa Pierre
• Tannhauser Falk
• Bellessort Romain
• Halna Du Fretay Tristan

Classifications

• H04N23/73 Primary

  by influencing the exposure time · CPC title

• H04N17/002 Primary

  for television cameras · CPC title

• H04N23/64

  Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image · CPC title

• H04N23/67

  Focus control based on electronic image sensor signals · CPC title

• H04N23/60

  Control of cameras or camera modules · CPC title