Road surface inspection device, road surface inspection method and recording medium

• US 9,233,644 B2
• Filed: 11/20/2012
• Issued: 01/12/2016
• Est. Priority Date: 12/28/2011
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Shimomura, Teruo, Totoki, Shin, Kuzunishi, Kazuyoshi
• Primary Examiner(s): Natnael, Paulos M
• Application Number:
  US13/682,366
• Publication Number:
  US 20130169794A1
• Time in Patent Office: 1,148 Days
• Field of Search: 348128-130, 701/23, 701/48, 701/50, 701/80, 382/103, 382/108
• US Class Current: 1/1
• CPC Class Codes: E01C 23/01 Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports form rails E01C19/50; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs E01C23/07 takes precedence; measuring roughness or irregularity in general G01B
• CPC Class Codes: G01C 7/04 involving a vehicle which moves along the profile to be traced

Abstract

A road surface inspection device detects an abnormal region on a road surface from the road surface on a road image captured by a camera. The road surface inspection device determines whether the detected abnormal region overlaps a trace on the road image, along which the wheels of a patrol car are expected to pass on the road surface. When the abnormal region overlaps the trace of wheels, the road surface inspection device determines whether an acceleration at the measurement time corresponding to the captured time of the road image among the accelerations measured during driving on the road surface by a G-sensor is outside a predetermined range.

Claims

1. A non-transitory computer-readable recording medium having stored therein a program that causes a computer to execute a road surface inspection process comprising:

detecting an abnormal region on a road surface from the road surface on an image stored in an image storage that stores therein an image in which a road surface of a road is captured by an imaging device mounted on a vehicle in association with a captured time of the image;

first determining whether the abnormal region overlaps a wheel trace stored in a trace storage that stores a trace on the image captured by the imaging device, along which wheels of the vehicle are expected to pass on the road surface, or a trace along which the wheels of the vehicle passes on the road surface; and

when the abnormal region is determined to overlap the trace of the wheels, second determining whether an acceleration is outside a predetermined acceleration range, the acceleration being an acceleration at a measurement time corresponding to the captured time of the image in which the abnormal region overlaps the trace of the wheels among accelerations stored in an acceleration storage that stores therein an acceleration measured during driving on the road surface by an acceleration sensor mounted on the vehicle in association with the measurement time of the acceleration.

2. The non-transitory computer-readable recording medium according to claim 1, wherein the road surface inspection process further comprises, when the acceleration is determined to be outside the predetermined range, first registering an image in which at least the abnormal region overlaps the trace of the wheels in a deterioration information storage that stores information on deterioration of the road surface.

3. The non-transitory computer-readable recording medium according to claim 2, wherein the first registering includes registering an acceleration at the measurement time corresponding to the captured time of the image in the deterioration information storage in association with the image in which the abnormal region overlaps the trace of the wheels.

4. The non-transitory computer-readable recording medium according to claim 2, wherein the first registering includes registering a position of the vehicle at an acquisition time corresponding to the captured time of the image among positions stored in a position storage that stores therein the position acquired by a position acquiring device mounted on the vehicle in association with the acquisition time of the position, in the deterioration information storage in association with the image in which the abnormal region overlaps the trace of the wheels.

5. The non-transitory computer-readable recording medium according to claim 1, wherein the road surface inspection process further comprises, when the abnormal region is determined not to overlap the trace of the wheels, second registering an image in which at least the abnormal region is detected in a deterioration candidate information storage that stores information on a candidate of deterioration of the road surface.

6. A road surface inspection device comprising:

a memory; and

a processor coupled to the memory, wherein the processor executes a process comprising;

detecting an abnormal region on a road surface from the road surface on an image stored in an image storage that stores therein an image in which a road surface of a road is captured by an imaging device mounted on a vehicle in association with a captured time of the image;

first determining whether the abnormal region overlaps a wheel trace stored in a trace storage that stores a trace on the image captured by the imaging device, along which the wheels of the vehicle are expected to pass on the road surface, or a trace along which wheels of the vehicle passes on the road surface; and

when the abnormal region is determined to overlap the trace of the wheels, second determining whether an acceleration is outside a predetermined acceleration range, the acceleration being an acceleration at a measurement time corresponding to the captured time of the image in which the abnormal region overlaps the trace of the wheels among accelerations stored in an acceleration storage that stores therein an acceleration measured during driving on the road surface by an acceleration sensor mounted on the vehicle in association with the measurement time of the acceleration.

7. A road surface inspection method comprising:

detecting, using a processor, an abnormal region on a road surface from the road surface on an image stored in an image storage that stores therein an image in which a road surface of a road is captured by an imaging device mounted on a vehicle in association with a captured time of the image;

first determining, using the processor, whether the abnormal region overlaps a wheel trace stored in a trace storage that stores a trace on the image captured by the imaging device, along which wheels of the vehicle are expected to pass on the road surface, or a trace along which the wheels of the vehicle passes on the road surface; and

when the abnormal region is determined to overlap the trace of the wheels, second determining, using the processor, whether an acceleration is outside a predetermined acceleration range, the acceleration being an acceleration at a measurement time corresponding to the captured time of the image in which the abnormal region overlaps the trace of the wheels among accelerations stored in an acceleration storage that stores therein an acceleration measured during driving on the road surface by an acceleration sensor mounted on the vehicle in association with the measurement time of the acceleration.