# US 11,308,709 B2 · Deposit detection device and deposit detection method

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- Number: US 11,308,709 B2
- Document ID: US11308709B2
- Status: Granted
- Kind: B2
- Application number: 17/016,876
- Filed: 2020-09-10
- Published: 2021-03-25
- Granted: 2022-04-19
- Earliest claimed: 2019-09-20
- Assignees: DENSO TEN Limited
- Applicants: DENSO TEN Limited
- Inventors: Nobuhisa Ikeda; Nobunori Asayama; Takashi Kono; Yasushi Tani; Daisuke Yamamoto; Tomokazu Oki; Teruhiko Kamibayashi
- Web page: https://patentgrep.com/patent/US11308709B2

## CPC

- G06T 7/0002: {Inspection of images, e.g. flaw detection}
- G06T 7/73: using feature-based methods
- G06V 10/22: by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
- G06V 10/98: Detection or correction of errors, e.g. by rescanning the pattern or by human intervention; Evaluation of the quality of the acquired patterns
- G06V 20/56: exterior to a vehicle by using sensors mounted on the vehicle
- G06T 2207/30168: Image quality inspection
- G06V 10/25: Determination of region of interest [ROI] or a volume of interest [VOI]
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING

## Abstract

A deposit detection device according to an embodiment includes a detection module and a determination module. The detection module detects a deposit region including a deposit adhering to a lens of an imaging device from a captured image captured by the imaging device. The determination module performs maintenance determination as to whether to maintain a detection history of detection by the detection module, based on brightness information of the captured image.

## Claims

### Claim 1

A deposit detection device comprising:
a detection module configured to detect a deposit region from a captured image captured by an imaging device, the deposit region including a deposit adhering to a lens of the imaging device; and
a determination module configured to perform maintenance determination as to whether to maintain a detection history of detection by the detection module, based on brightness information of the captured image.

### Claim 2 (depends on 1)

The deposit detection device according to claim 1, wherein the determination module performs the maintenance determination, based on the brightness information of a region of interest set in the captured image.

### Claim 3 (depends on 1)

The deposit detection device according to claim 1, wherein the determination module performs the maintenance determination for each deposit region, based on the brightness information for the corresponding deposit region.

### Claim 4 (depends on 1)

The deposit detection device according to claim 1, wherein when the determination module determines to maintain the detection history, the detection module skips a detection process for the deposit region previously detected.

### Claim 5 (depends on 4)

The deposit detection device according to claim 4, wherein when the determination module determines to maintain the detection history, the detection module continues a detection process for a new deposit region.

### Claim 6

A deposit detection method comprising:
detecting a deposit region from a captured image captured by an imaging device, the deposit region including a deposit adhering to a lens of the imaging device; and
determining whether to maintain a detection history of detection at the detecting, based on brightness information of the captured image.