Pedestrian detection device and pedestrian detection method
First Claim
1. A pedestrian detection device mounted on a vehicle having a vehicular camera and at least one of a sonar and a radar, and analyzing a captured image captured by the vehicular camera to detect a pedestrian in the captured image, the pedestrian detection device comprising:
- an identification dictionary storage unit that, using a processor, stores a plurality of kinds of identification dictionaries having different numerical values obtained by converting a plurality of features of a shape of a pedestrian in a previously captured image into a numerical form;
a detection result accumulation unit that, using the processor, searches the plurality of kinds of identification dictionaries stored in the identification dictionary storage unit for a part of the captured image having one of the features described in the identification dictionaries to detect the pedestrian in the captured image, and accumulates a detection position, where the pedestrian is detected, as a detection result for each of the identification dictionaries;
a pedestrian position accumulation unit that, using the processor, detects the pedestrian disposed around the vehicle using at least one of the sonar and the radar, and accumulates a pedestrian position where the pedestrian is detected;
an identification dictionary selection unit that, using the processor, compares the pedestrian position accumulated in the pedestrian position accumulation unit with the detection position of the pedestrian accumulated as the detection result for each of the identification dictionaries in the detection result accumulation unit, and selects one of the identification dictionaries having the detection result consistent with the pedestrian position as a detection identification dictionary;
a pedestrian detection unit that, using the processor, searches for a part of the captured image having one of the features described in the detection identification dictionary, and detects the pedestrian in the captured image;
a detection accuracy evaluation unit that, using the processor, accumulates the detection position of the pedestrian obtained by the detection identification dictionary and the pedestrian position detected using at least one of the sonar and the radar, and evaluates a detection accuracy of the detection identification dictionary; and
a reselection necessity determination unit that, using the processor, determines a necessity of reselection of the detection identification dictionary based on an evaluation result obtained by the detection accuracy evaluation unit, wherein;
the detection result accumulation unit accumulates the detection result for each of the identification dictionaries when the reselection necessity determination unit determines that reselection of the detection identification dictionary is necessary.
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Abstract
A pedestrian detection device on a vehicle having a vehicular camera and a sonar or a radar includes: an identification dictionary storage unit that stores multiple identification dictionaries of shape features of a pedestrian; a detection result accumulation unit that searches the captured image for one feature to detect the pedestrian, and accumulates a detection result for each identification dictionary; a pedestrian position accumulation unit that detects the pedestrian using the sonar or the radar, and accumulates a pedestrian position; an identification dictionary selection unit that selects a detection identification dictionary having the detection result consistent with the pedestrian position; and a pedestrian detection unit that searches the captured image for one feature described in the detection identification dictionary, and detects the pedestrian.
38 Citations
8 Claims
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1. A pedestrian detection device mounted on a vehicle having a vehicular camera and at least one of a sonar and a radar, and analyzing a captured image captured by the vehicular camera to detect a pedestrian in the captured image, the pedestrian detection device comprising:
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an identification dictionary storage unit that, using a processor, stores a plurality of kinds of identification dictionaries having different numerical values obtained by converting a plurality of features of a shape of a pedestrian in a previously captured image into a numerical form; a detection result accumulation unit that, using the processor, searches the plurality of kinds of identification dictionaries stored in the identification dictionary storage unit for a part of the captured image having one of the features described in the identification dictionaries to detect the pedestrian in the captured image, and accumulates a detection position, where the pedestrian is detected, as a detection result for each of the identification dictionaries; a pedestrian position accumulation unit that, using the processor, detects the pedestrian disposed around the vehicle using at least one of the sonar and the radar, and accumulates a pedestrian position where the pedestrian is detected; an identification dictionary selection unit that, using the processor, compares the pedestrian position accumulated in the pedestrian position accumulation unit with the detection position of the pedestrian accumulated as the detection result for each of the identification dictionaries in the detection result accumulation unit, and selects one of the identification dictionaries having the detection result consistent with the pedestrian position as a detection identification dictionary; a pedestrian detection unit that, using the processor, searches for a part of the captured image having one of the features described in the detection identification dictionary, and detects the pedestrian in the captured image; a detection accuracy evaluation unit that, using the processor, accumulates the detection position of the pedestrian obtained by the detection identification dictionary and the pedestrian position detected using at least one of the sonar and the radar, and evaluates a detection accuracy of the detection identification dictionary; and a reselection necessity determination unit that, using the processor, determines a necessity of reselection of the detection identification dictionary based on an evaluation result obtained by the detection accuracy evaluation unit, wherein; the detection result accumulation unit accumulates the detection result for each of the identification dictionaries when the reselection necessity determination unit determines that reselection of the detection identification dictionary is necessary. - View Dependent Claims (2, 3, 4, 5)
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6. A pedestrian detection method applied to a vehicle having a vehicular camera and at least one of a sonar and a radar, and analyzing a captured image captured by the vehicular camera to detect a pedestrian included in the captured image, the pedestrian detection method comprising:
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searching a plurality of kinds of identification dictionaries, described by converting a plurality of features of a shape of a pedestrian in a previously captured image into a numerical form, for a part of the captured image having one of the features described in the identification dictionaries to detect the pedestrian in the captured image; and
accumulating a detection position, where the pedestrian is detected, as a detection result for each of the identification dictionaries;detecting the pedestrian disposed around the vehicle using at least one of the sonar and the radar; and
accumulating a pedestrian position where the pedestrian is detected;comparing the pedestrian position accumulated in the accumulating of the pedestrian position with the detection position of the pedestrian accumulated as the detection result for each of the identification dictionaries in the accumulating of the detection result; and
selecting one of the identification dictionaries having the detection result consistent with the pedestrian position as a detection identification dictionary;searching for a part of the captured image having one of the features described in the detection identification dictionary to detect the pedestrian in the captured image; accumulating the detection position of the pedestrian obtained by the detection identification dictionary and the pedestrian position detected using at least one of the sonar and the radar, and evaluating a detection accuracy of the detection identification dictionary; determining a necessity of reselection of the detection identification dictionary based on an evaluation result obtained in the evaluating of the detection accuracy; and accumulating the detection position for each of the identification dictionaries when determining that reselection of the detection identification dictionary is necessary.
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7. A pedestrian detection device mounted on a vehicle having a vehicular camera and at least one of a sonar and a radar, and analyzing a captured image captured by the vehicular camera to detect a pedestrian in the captured image, the pedestrian detection device comprising:
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an identification dictionary storage unit that, using a processor, stores a plurality of kinds of identification dictionaries having different numerical values obtained by converting a plurality of features of a shape of a pedestrian in a previously captured image into a numerical form; a detection result accumulation unit that, using the processor, searches the plurality of kinds of identification dictionaries stored in the identification dictionary storage unit for a part of the captured image having one of the features described in the identification dictionaries to detect the pedestrian in the captured image, and accumulates a detection position, where the pedestrian is detected, as a detection result for each of the identification dictionaries; a pedestrian position accumulation unit that, using the processor, detects the pedestrian disposed around the vehicle using at least one of the sonar and the radar, and accumulates a pedestrian position where the pedestrian is detected; an identification dictionary selection unit that, using the processor, compares the pedestrian position accumulated in the pedestrian position accumulation unit with the detection position of the pedestrian as the detection result for each of the identification dictionaries in the detection result accumulation unit, and selects one of the identification dictionaries having the detection result consistent with the pedestrian position as a detection identification dictionary; a pedestrian detection unit that, using the processor, searches for a part of the captured image having one of the features described in the detection identification dictionary, and detects the pedestrian in the captured image; and a detection accuracy evaluation unit that, using the processor, accumulates the detection position of the pedestrian obtained by the detection identification dictionary and the pedestrian position detected using at least one of the sonar and the radar, and evaluates a detection accuracy of the detection identification dictionary, wherein; the identification dictionary selection unit selects the detection identification dictionary based on the detection accuracy.
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8. A pedestrian detection method applied to a vehicle having a vehicular camera and at least one of a sonar and a radar, and analyzing a captured image captured by the vehicular camera to detect a pedestrian included in the captured image, the pedestrian detection method comprising:
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searching a plurality of kinds of identification dictionaries, described by converting a plurality of features of a shape of the pedestrian in the captured image into a numerical form, for a part of the captured image having one of the features described in the identification dictionaries to detect the pedestrian in the captured image; and
accumulating a detection position, where the pedestrian is detected, as a detection result for each of the identification dictionaries;detecting the pedestrian disposed around the vehicle using at least one of the sonar and the radar; and
accumulating a pedestrian position where the pedestrian is detected;comparing the pedestrian position accumulated in the accumulating of the pedestrian position with the detection position of the pedestrian as the detection result for each of the identification dictionaries in the accumulating of the detection result; and
selecting one of the identification dictionaries having the detection result consistent with the pedestrian position as a detection identification dictionary;searching for a part of the captured image having one of the features described in the detection identification dictionary to detect the pedestrian in the captured image; and accumulating the detection position of the pedestrian obtained by the detection identification dictionary and the pedestrian position detected using at least one of the sonar and the radar, and evaluating a detection accuracy of the detection identification dictionary, wherein; the selecting of the detection identification dictionary is performed based on the detection accuracy.
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Specification