IMAGE PROCESSING DEVICE, COMPUTER PROGRAM, AND IMAGE PROCESSING SYSTEM

• US 20200134873A1
• Filed: 05/24/2018
• Published: 04/30/2020
• Est. Priority Date: 07/03/2017
• Status: Abandoned Application

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: UMEMURA, Michikazu, KISHITA, Yuri
• Application Number:
  US16/618,872
• Publication Number:
  US 20200134873A1
• Time in Patent Office: Days
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 7/11 Region-based segmentation
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80
• CPC Class Codes: G06T 7/90 Determination of colour characteristics
• CPC Class Codes: G06V 10/245 by locating a pattern; Special marks for positioning
• CPC Class Codes: G06V 10/56 relating to colour
• CPC Class Codes: G06V 20/58 Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
• CPC Class Codes: H04N 23/10 for generating image signals from different wavelengths
• CPC Class Codes: H04N 23/71 Circuitry for evaluating the brightness variation

Abstract

This image processing device includes: an image acquisition unit configured to acquire a color image captured by a camera; a brightness determination unit configured to determine a brightness in an imaging range of the camera; a detection target color determination unit configured to determine, on the basis of a determination result by the brightness determination unit, detection target colors of two or more colors from among three or more colors provided to a label including regions of the three or more colors; and a label detection unit configured to detect the label by extracting, from the image acquired by the image acquisition unit, regions of the detection target colors determined by the detection target color determination unit.

Claims

1. An image processing device comprising:

an image acquisition unit configured to acquire a color image captured by a camera;

a brightness determination unit configured to determine a brightness in an imaging range of the camera;

a detection target color determination unit configured to determine, on the basis of a determination result by the brightness determination unit, detection target colors of two or more colors from among three or more colors provided to a label including regions of the three or more colors; and

a label detection unit configured to detect the label by extracting, from the image acquired by the image acquisition unit, regions of the detection target colors determined by the detection target color determination unit.

2. The image processing device according to claim 1, wherein

the brightness determination unit determines the brightness on the basis of at least one of

the image acquired by the image acquisition unit,

imaging parameter information regarding adjustment of a brightness acquired from the camera, and

illuminance information acquired from an illuminance sensor configured to measure an illuminance at a position included in the imaging range of the camera.

3. The image processing device according to claim 1, wherein

the detection target color determination unit determines, as one of the detection target colors, at least an intermediate wavelength color which is a color other than a color having a longest wavelength and a color having a shortest wavelength among the three or more colors.

4. The image processing device according to claim 3, wherein

starting from a region of the intermediate wavelength color, the label detection unit sequentially extracts the regions of the detection target colors.

5. The image processing device according to claim 1, wherein

the label includes a red region, a blue region, and a green region.

6. The image processing device according to claim 1, further comprising

an output unit configured to output information according to a detection result by the label detection unit.

8. An image processing system comprising:

a label including regions of three or more colors, the label configured to be attached to a detection target object;

a camera configured to capture a color image; and

the image processing device according to claim 1.

7. A non-transitory computer readable storage medium storing a computer program configured to cause a computer to function as:

an image acquisition unit configured to acquire a color image captured by a camera;

a brightness determination unit configured to determine a brightness in an imaging range of the camera;

a detection target color determination unit configured to determine, on the basis of a determination result by the brightness determination unit, detection target colors of two or more colors from among three or more colors provided to a label including regions of the three or more colors; and

a label detection unit configured to detect the label by extracting, from the image acquired by the image acquisition unit, regions of the detection target colors determined by the detection target color determination unit.