Imaging control device, imaging control method, and non-transitory computer-readable recording medium

Patent metadata

Field	Value
Publication number	US-2021112191-A1
Application number	US-202017108294-A
Country	US
Kind code	A1
Filing date	Dec 1, 2020
Priority date	Jun 11, 2018
Publication date	Apr 15, 2021
Grant date	—

Abstract

An imaging control device determining a group of parameters related to a shooting operation of a camera, comprising a communication circuit inputting imaging data generated by the camera and a control circuit selecting a group of parameters set in the camera from candidate groups of parameters based on the imaging data, wherein the control circuit acquires, via the communication circuit, each imaging data generated by the camera to which each candidate group of parameters is set, extracts a plurality of face images each including a human face, from the imaging data for each candidate group, calculates an evaluation value on image quality corresponding to a degree of match of automatic face recognition based on the plurality of face images for each candidate group, and selects any one group of parameters from the candidate group of parameters based on evaluation values on image quality.

First claim

What is claimed is:

1 . An imaging control device determining a group of parameters related to a shooting operation of a camera and suitable for automatic face recognition, comprising:
a communication circuit inputting imaging data generated by the camera; and a control circuit selecting a group of parameters set in the camera from candidate groups of parameters based on the imaging data, wherein the control circuit acquires, via the communication circuit, each imaging data generated by the camera to which each candidate group of parameters is set, extracts a plurality of face images each including a human face, from the imaging data for each candidate group, calculates an evaluation value on image quality corresponding to a degree of match of automatic face recognition based on the plurality of face images for each candidate group, and selects any one group of parameters from the candidate groups of parameters based on evaluation values on image quality.

2 . The imaging control device according to claim 1 , wherein
the control circuit selects the group of parameters providing the largest evaluation value on image quality among the evaluation values on image quality of the respective candidate groups.

3 . The imaging control device according to claim 1 , wherein
the control circuit generates the candidate groups of parameters by using a genetic algorithm.

4 . The imaging control device according to claim 1 , wherein the control circuit calculates an L2 norm of respective features of the plurality of face images and calculates the evaluation value on image quality based on the L2 norm.

5 . The imaging control device according to claim 1 , wherein the control circuit calculates respective Gabor features of the plurality of face images and calculates the evaluation value on image quality based on the Gabor features.

6 . The imaging control device according to claim 1 , wherein the group of parameters includes at least two of aperture value, gain, white balance, shutter speed, and focal length.

7 . An imaging control method of determining a group of parameters related to a shooting operation of a camera and suitable for automatic face recognition, the method comprising the steps of:
by use of an processing unit, acquiring, via a communication circuit, imaging data generated by the camera to which each candidate group of parameters is set; extracting a plurality of face images each including a human face, from the imaging data for each candidate group; calculating an evaluation value on image quality corresponding to a degree of match of automatic face recognition based on the plurality of face images for each candidate group; and selecting the group of parameters to be set in the camera from the candidate groups of parameters based on the evaluation values on image quality.

8 . A non-transitory computer-readable recording medium storing a computer program causing a control circuit included in a imaging control device to execute:
extracting a plurality of face images each including a human face from the imaging data for each of the candidates; calculating an image quality evaluation value corresponding to a degree of suitability for automatic face recognition based on the plurality of face images for each of the candidates; and selecting the parameter group set in the camera from the plurality of candidates for the parameter group based on the image quality evaluation value.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Maeno Kazuki
• Ogura Yasunobu
• KAGAYA Tomoyuki

Classifications

• G03B7/091 Primary

  Digital circuits · CPC title

• G06V10/993

  Evaluation of the quality of the acquired pattern · CPC title

• G06V10/82

  using neural networks · CPC title

• G06V10/147

  Details of sensors, e.g. sensor lenses (fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19) · CPC title

• H04N23/62

  Control of parameters via user interfaces · CPC title