ENVIRONMENT RECOGNITION DEVICE AND ENVIRONMENT RECOGNITION METHOD
First Claim
1. An environment recognition device comprising:
- a data retaining unit that retains a luminance range in association with a specific object;
a luminance obtaining unit that obtains a luminance of a target portion in a detection area of an image;
a luminance specifying unit that specifies a luminance of a road surface and a luminance of a predetermined reference portion other than a road surface from among the obtained luminances;
a white balance deriving unit that derives a white balance correction value such that the luminance of the road surface is recognized as a specific color;
a white balance performing unit that derives a corrected luminance by performing a white balance correction using the white balance correction value on the obtained luminances; and
a specific object provisional determining unit that provisionally determines a specific object corresponding to the target portion with a corrected luminance of the target portion based on the association retained in the data retaining unit, wherein,when the luminance of the road surface changes by a first predetermined value or more under a state in which the luminance of the reference portion does not change by a second predetermined value or more, and a luminance of the road surface after the change is not the predetermined color, the white balance deriving unit maintains the white balance correction value prior to the change from when the change occurs until the luminance of the road surface returns to the predetermined color.
3 Assignments
0 Petitions
Accused Products
Abstract
A environment recognition device obtains luminances of a target portion existing in an area specifies a road surface luminance and a reference portion luminance; when the road surface luminance changes by a predetermined value or more, the reference portion luminance does not change by another predetermined value or more, and the changed road surface luminance is not a predetermined color, maintains a white balance correction value prior to the change until the road surface luminance returns to the predetermined color, and, in other cases, derives a white balance correction value to recognize the road surface luminance as the predetermined color; derives a corrected luminance by performing a white balance correction using the white balance correction value on the obtained luminance; and provisionally determines a object corresponding to the target portion from a corrected luminance of the target portion based on an association of a luminance range and the specific object.
70 Citations
15 Claims
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1. An environment recognition device comprising:
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a data retaining unit that retains a luminance range in association with a specific object; a luminance obtaining unit that obtains a luminance of a target portion in a detection area of an image; a luminance specifying unit that specifies a luminance of a road surface and a luminance of a predetermined reference portion other than a road surface from among the obtained luminances; a white balance deriving unit that derives a white balance correction value such that the luminance of the road surface is recognized as a specific color; a white balance performing unit that derives a corrected luminance by performing a white balance correction using the white balance correction value on the obtained luminances; and a specific object provisional determining unit that provisionally determines a specific object corresponding to the target portion with a corrected luminance of the target portion based on the association retained in the data retaining unit, wherein, when the luminance of the road surface changes by a first predetermined value or more under a state in which the luminance of the reference portion does not change by a second predetermined value or more, and a luminance of the road surface after the change is not the predetermined color, the white balance deriving unit maintains the white balance correction value prior to the change from when the change occurs until the luminance of the road surface returns to the predetermined color. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An environment recognition method comprising:
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obtaining a luminance of a target portion in a detection area of an image; specifying a luminance of a road surface and a luminance of a predetermined reference portion that is other than the road surface from among the obtained luminances; maintaining, when the luminance of the road surface changes by a first predetermined value or more under a state in which the luminance of the reference portion does not change by a second predetermined value or more, and if a luminance of the road surface after the change is not a predetermined color, a white balance correction value prior to the change from when the change occurs until the luminance of the road surface returns to the predetermined color, and deriving a white balance correction value so that the luminance of the road surface can be recognized as a specific color in cases other than the above; deriving a corrected luminance by performing a white balance correction using the white balance correction value on the obtained luminance; and provisionally determining a specific object corresponding to the target portion from a corrected luminance of the target portion based on an association of a luminance range and the specific object retained in the data retaining unit.
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Specification