Measurement method

Patent metadata

Field	Value
Publication number	US-12260647-B2
Application number	US-202017781089-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Dec 10, 2019
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

A measurement apparatus detects a person and an umbrella based on acquired image data, and measures the number of persons based on a detected result.

First claim

What is claimed is:

1. A measurement method performed by a computer comprising:
acquiring, from a camera, a plurality of frames of image data;
detecting an umbrella and each of one or more heads in each frame;
generating, on each frame, a rectangle surrounding each detected head and a rectangle surrounding the detected umbrella;
for each head, generating a tracking line connecting the head between the frames;
generating a tracking line connecting the umbrella between the frames;
determining a number of associations satisfying a condition, each association including the umbrella and one of the heads; and
outputting a number of persons in the image data as the number of the associations satisfying the condition.

2. The measurement method according to claim 1 , comprising:
associating the persons and the umbrella.

3. The measurement method according to claim 2 , comprising
associating each person and the umbrella based on a positional relation between the rectangle corresponding to the person and the umbrella in the frames.

4. The measurement method according to claim 2 , comprising
associating each person and the umbrella based on a relation between the rectangle corresponding to movement angles of the person and the umbrella in the frames.

5. The measurement method according to claim 2 , comprising
associating each person and the umbrella based on how the rectangle corresponding to the person and the umbrella overlap in the frames.

6. The measurement method according to claim 5 , comprising
associating each person and the umbrella based on how the rectangle corresponding to the person and a result of shifting a rectangle enclosing the umbrella by a predetermined method overlap.

7. The measurement method according to claim 1 , comprising
when detecting the umbrella and each of one or more heads in each frame, performing the measurement corresponding to the number of the persons associated with the umbrella.

8. The measurement method according to claim 1 , comprising
when detecting the umbrella that is not associated with the persons, measuring the number of the persons based on a result of detecting the umbrella.

9. A measurement apparatus comprising:
a memory storing instructions; and
a processor configured to execute the instructions to:
acquire, from a camera, a plurality of frames of image data;
detect an umbrella and each of one or more heads in each frame;
generate, on each frame, a rectangle surrounding each detected head and a rectangle surrounding the detected umbrella;
for each head, generate a tracking line connecting the head between the frames;
generate a tracking line connecting the umbrella between the frames;
determine a number of associations satisfying a condition, each association including the umbrella and one of the heads; and
output a number of persons in the image data as the number of the associations satisfying the condition.

10. A non-transitory computer-readable recording medium storing a program executable by a measurement apparatus to perform a process comprising:
acquiring, from a camera, a plurality of frames of image data;
detecting an umbrella and each of one or more heads in each frame;
generating, on each frame, a rectangle surrounding each detected head and a rectangle surrounding the detected umbrella;
for each head, generating a tracking line connecting the head between the frames;
generating a tracking line connecting the umbrella between the frames;
determining a number of associations satisfying a condition, each association including the umbrella and one of the heads; and
outputting a number of persons in the image data as the number of the associations satisfying the condition.

Assignees

• Nec Solution Innovators Ltd

Inventors

• Saitoh Takeshi

Classifications

• G06T2207/30196

  Human being; Person · CPC title

• G06V2201/07

  Target detection · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title

• G06V2201/10

  Recognition assisted with metadata · CPC title

• G06M7/00

  Counting of objects carried by a conveyor · CPC title