Crack detection device, crack detection method and computer readable medium
AssigneeMitsubishi Electric Corporation
InventorsMitsunobu Yoshida, Tadashiro Kondo, Taichi Ishifuji
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Abstract
In a crack detection device (10), an image acquisition unit (21) acquires image data acquired by taking an image of a road surface from an oblique direction with respect to the road surface. An image classification unit (22) classifies image data acquired into an acceptable range with a resolution higher than a standard value, and an unacceptable range with a resolution equal to or less than the standard value. A data output unit (23) outputs acceptable data being image data of a part classified into the acceptable range as data to detect a crack on the road surface. An image display unit (24) displays data output.
Claims13
A crack detection device comprising:
- processing circuitry to:
- acquire image data acquired by imaging a road surface from an oblique direction with respect to the road surface;
- classify the acquired image data into an acceptable range with a resolution higher than a standard value, and an unacceptable range with a resolution equal to or less than the standard value;
- and
- output acceptable data being image data of a part classified into the acceptable range, as data to detect a crack on the road surface,
- wherein the image data is acquired by an imaging device that is mounted on a moving object, and
- wherein the processing circuitry is configured to set a determination width being a lower limit value of a crack width to be detected in accordance with a shutter speed of the imaging device and a moving speed of the moving object.
A crack detection method comprising:
- acquiring image data acquired by imaging a road surface from an oblique direction with respect to the road surface;
- classifying the image data into an acceptable range with a resolution higher than a standard value, and an unacceptable range with a resolution equal to or less than the standard value;
- and
- outputting acceptable data being image data of a part classified into the acceptable range, as data to detect a crack on the road surface,
- wherein the image data is acquired by an imaging device that is mounted on a moving object, and
- wherein the method includes setting a determination width being a lower limit value of a crack width to be detected in accordance with a shutter speed of the imaging device and a moving speed of the moving object.
A non-transitory computer readable medium storing a crack detection program to make a computer function as a crack detection device, the crack detection program performing:
- an image acquisition process to acquire image data acquired by imaging a road surface from an oblique direction with respect to the road surface;
- an image classification process to classify the image data acquired by the image acquisition process into an acceptable range with a resolution higher than a standard value, and an unacceptable range with a resolution equal to or less than the standard value;
- and
- a data output process to output acceptable data being image data of a part classified into the acceptable range by the image classification process, as data to detect a crack on the road surface,
- wherein the image data is acquired by an imaging device that is mounted on a moving object, and
- wherein the crack detection program performed a setting process to set a determination width being a lower limit value of a crack width to be detected in accordance with a shutter speed of the imaging device and a moving speed of the moving object.
Dependencies are inferred from the claim text.