Detection apparatus, detection method, detection program, and imaging apparatus

Patent metadata

Field	Value
Publication number	US-11275230-B2
Application number	US-201615741307-A
Country	US
Kind code	B2
Filing date	Jun 27, 2016
Priority date	Aug 31, 2015
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A detection apparatus has a detector for detecting, on the basis of an object area that is an area corresponding to an object in an image, an effective focus area from two or more focus areas set to the image.

First claim

The invention claimed is:

1. A detection apparatus comprising:
detection circuitry configured to
receive an image including a plurality of objects,
set a predetermined array of focus areas to said image,
determine a first group of focus areas from said predetermined array of focus areas, each focus area of said first group with a corresponding area in said image having two or more different distances associated with two or more objects of said plurality of objects,
determine a remaining group of focus areas from said predetermined array of focus areas, said remaining group of focus areas excluding said first group of focus areas, and
determine an effective focus area from said remaining group of focus areas.

2. The detection apparatus according to claim 1 , wherein said detection circuitry is further configured to
determine an average of defocus information for each object area of said plurality of objects in said image based on object area information and defocus information,
determine depth information based on said average of defocus information for said each object area, and
determine an object area that is an area corresponding to only one object of said plurality of objects based at least in part on said depth information.

3. The detection apparatus according to claim 2 , wherein said detection circuitry is further configured to
superimpose said object area information, said depth information, and focus area positional information, and
determine a degree of existence of any of said plurality of objects having different distances in said each focus area of said predetermined array of focus areas.

4. The detection apparatus according to claim 3 , wherein said detection circuitry is further configured to
determine a second object area that is a second area corresponding to said two or more objects of said plurality of objects based on said degree of existence of said any of said plurality of objects having said different distances in said each focus area of said predetermined array of focus areas equal to or lower than a predetermined threshold value, and
detect a second effective focus area from said predetermined array of focus areas based on said object area and said second object area.

5. The detection apparatus according to claim 3 , wherein said detection circuitry is further configured to sort said each focus area of said predetermined array of focus areas based on said degree of existence of any of said plurality of objects having said different distances in said each focus area of said predetermined array of focus areas.

6. The detection apparatus according to claim 5 , wherein focus areas other than said effective focus area are sorted into an ineffective focus area and an intermediate focus area.

7. The detection apparatus according to claim 6 , wherein said detection circuitry is further configured to output information indicative of said effective focus area, said ineffective focus area, and said intermediate focus area to an external device.

8. The detection apparatus according to claim 7 , wherein only said effective focus area is used for auto focus processing in said external device.

9. The detection apparatus according to claim 1 , wherein said detection circuitry is further configured to output information indicative of said effective focus area to an external device.

10. The detection apparatus according to claim 1 , wherein said predetermined array of focus areas includes
a first plurality of focus areas in odd rows and odd columns of said predetermined array of focus areas, said first plurality of focus areas are uniformly spaced from each other, and
a second plurality of focus areas in even rows and even columns of said predetermined array of focus areas, said second plurality of focus areas are uniformly spaced from each other, and each focus area of said second plurality of focus areas is uniformly spaced between four focus areas of said first plurality of focus areas.

11. A detection method comprising:
receiving, with detection circuitry, an image including a plurality of objects;
setting, with said detection circuitry, a predetermined array of focus areas to said image;
determining, with said detection circuitry, a first group of focus areas from said predetermined array of focus areas, each focus area of said first group with a corresponding area in said image having two or more different distances associated with two or more objects of said plurality of objects;
determining, with said detection circuitry, a remaining group of focus areas from said predetermined array of focus areas, said remaining group of focus areas excluding said first group of focus areas; and
determining, with said detection circuitry, an effective focus area from said remaining group of focus areas.

12. A non-transitory computer-readable medium comprising a detection program that, when executed by an electronic processor, causes said electronic processor to perform a set of operations comprising:
receiving an image including a plurality of objects;
setting a predetermined array of focus areas to said image;
determining a first group of focus areas from said predetermined array of focus areas, each focus area of said first group with a corresponding area in said image having two or more different distances associated with two or more objects of said plurality of objects;
determining a remaining group of focus areas from said predetermined array of focus areas, said remaining group of focus areas excluding said first group of focus areas; and

determining an effective focus area from said remaining group of focus areas.

13. An imaging apparatus comprising:
an image pickup element configured to take an image; and
detection circuitry configured to
receive said image including a plurality of objects,
set a predetermined array of focus areas to said image,
determine a first group of focus areas from said predetermined array of focus areas, each focus area of said first group with a corresponding area in said image having two or more different distances associated with two or more objects of said plurality of objects,
determine a remaining group of focus areas from said predetermined array of focus areas, said remaining group of focus areas excluding said first group of focus areas, and
determine an effective focus area from said remaining group of focus areas.

14. The imaging apparatus according to claim 13 , further comprising:
a display unit configured to perform display control processing based on a result of detection of said effective focus area, an ineffective focus area, and an intermediate focus area in said predetermined array of focus areas.

15. The imaging apparatus according to claim 14 , wherein said display unit is further configured to change a displaying of each focus area of said predetermined array of focus areas according to said result of detection.

16. The imaging apparatus according to claim 15 , wherein said display unit is further configured to change a transparency degree of a display color of a frame of said each focus area.

17. The imaging apparatus according to claim 14 , wherein said display unit is further configured to change a displaying of a focused area among a plurality of areas corresponding to an object in an image displayed on said display unit.

18. The imaging apparatus according to claim 17 , wherein said display unit is further configured to change a color of said focused area among said plurality of areas corresponding to said object in said image displayed on said di

Assignees

• Sony Group Corp

Inventors

• Sun Legong
• Inaba Seijiro

Classifications

• H04N23/675 Primary

  comprising setting of focusing regions · CPC title

• H04N23/635

  Region indicators; Field of view indicators · CPC title

• H04N23/61

  based on recognised objects · CPC title

• H04N23/611

  where the recognised objects include parts of the human body · CPC title

• G02B7/34 Primary

  using different areas in a pupil plane · CPC title