Obstacle monitoring device using one-dimensional signal
First Claim
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1. An obstacle monitoring device comprising:
- imaging means for taking an image of a predetermined area;
one-dimension extracting means for extracting a one-dimensional signal from the image; and
obstacle detecting means for determining presence or absence of an obstacle based on the one-dimensional signal.
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Abstract
Luminous values of pixels of coordinates previously set as an obstacle presence line are inputted to a memory as a one-dimensional signal converted from a two-dimensional image signal taken by a camera. A portion of the line has a luminous value other than a luminous value predicted as a luminous value of a normal road. The portion of the line is then extracted as a vehicle candidate range. Further, based on characteristic of the vehicle such as a vehicle width or a relative speed, presence or absence of the vehicle is determined by removing noise from the extracted vehicle candidate range.
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Citations
33 Claims
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1. An obstacle monitoring device comprising:
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imaging means for taking an image of a predetermined area;
one-dimension extracting means for extracting a one-dimensional signal from the image; and
obstacle detecting means for determining presence or absence of an obstacle based on the one-dimensional signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of monitoring an obstacle comprising steps of:
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taking an image of a predetermined area;
extracting a one-dimensional signal from the image; and
determining presence or absence of an obstacle based on the one-dimensional signal.
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Specification