Imaging environment recognition device
First Claim
1. An imaging environment recognition device having an imaging means for imaging an area surrounding a vehicle and an image recognition section for recognizing an object and texture existing within a field of view of the imaging means by processing an image captured by the imaging means, the imaging environment recognition device comprising:
- a storage means for storing shape information of an object of interest;
a distortion/defocus degree calculation section for calculating degrees of distortion and defocus of the object of interest and the texture in an captured image, based on shapes of the object of interest and the texture on the captured image and the shape information of the object of interest stored in said storage means; and
an imaging environment recognition section for recognizing imaging environment based on the degrees of distortion and defocus calculated.
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Accused Products
Abstract
An imaging environment that greatly affects image recognition accuracy is recognized for applications in onboard systems of various sorts including imaging devices. An imaging device for imaging areas around the vehicle is mounted on a vehicle. Before executing image recognition processing, information is acquired on objects and texture, such as traffic signs and pedestrian crossings, present within a field of view of the imaging device. An object or texture present within the field of view is then recognized by an image recognition section. Degrees of distortion and defocus of a shape or texture of the object recognized are calculated based on the shape or texture of the object recognized and information previously acquired on the objects or texture. Imaging environment, such as water droplets or dirt on a lens, and whether fog occurs or not, is then recognized based on the degrees of distortion and defocus calculated from the shape or texture of the object recognized.
54 Citations
11 Claims
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1. An imaging environment recognition device having an imaging means for imaging an area surrounding a vehicle and an image recognition section for recognizing an object and texture existing within a field of view of the imaging means by processing an image captured by the imaging means, the imaging environment recognition device comprising:
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a storage means for storing shape information of an object of interest;
a distortion/defocus degree calculation section for calculating degrees of distortion and defocus of the object of interest and the texture in an captured image, based on shapes of the object of interest and the texture on the captured image and the shape information of the object of interest stored in said storage means; and
an imaging environment recognition section for recognizing imaging environment based on the degrees of distortion and defocus calculated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for recognizing imaging environment, the method using a camera for taking an image surrounding a vehicle and recognizing an object and texture existing within a field of view of the camera, the method comprising the steps of:
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calculating degrees of distortion and defocus of the object and the texture in the image taken by the camera, based on shapes of the object and the texture on the image taken by the camera and shape information of objects to be recognized stored previously; and
recognizing the imaging environment based on the degrees of distortion and defocus calculated. - View Dependent Claims (10, 11)
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Specification