Vehicle-based imaging system function diagnosis and validation
First Claim
1. A method of determining functional validity of a vision-based imaging system for a vehicle, the method comprising the steps of:
- capturing successive images by the vision-based imaging system mounted to a vehicle, the images including landmarks that are identified in multiple images for distinguishing displacement of landmarks between the images;
generating an edge map for each of the images by a processing module;
comparing like regions of at least two edge maps for distinguishing displacement of a landmark between the at least two edge maps, each edge map being constructed of pixels having varying intensity values, wherein each pixel location of a first edge map is compared with a same pixel location of a second edge map, wherein each of the same pixel locations of the at least two edge maps are compared within one another for determining whether each compared pixel location has a different intensity value; and
determining an aggregate number of pixel locations having a different intensity value between the at least two edge maps;
determining whether the aggregate number is greater than a threshold for indicating displacement of the landmarks between the at least two edge maps;
generating an error message to a driver in response to the aggregate number being less than the threshold;
validating a functionality of the vision-based imaging system in response to the aggregate number being greater than a threshold; and
generating an error message by an output device in response to determining invalidity of the functionality of the vision-based imaging system.
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Accused Products
Abstract
A method of determining functionality of a vision-based imaging system for a vehicle includes capturing images by the vision-based imaging system. The images include landmarks that are identified in multiple images for distinguishing displacement of landmarks between the images. Edge maps for each of the images are generated. Like regions of at least two edge maps are compared for distinguishing displacement of a landmark between the at least two edge maps. Each pixel location of a first edge map is compared with a same pixel location of a second edge map for determining whether each compared pixel location has a different intensity value. An aggregate number of pixel locations having a different intensity value between the at least two edge maps is determined and compared to a threshold. An error message is generated in response to the aggregate number being less than the threshold.
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Citations
20 Claims
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1. A method of determining functional validity of a vision-based imaging system for a vehicle, the method comprising the steps of:
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capturing successive images by the vision-based imaging system mounted to a vehicle, the images including landmarks that are identified in multiple images for distinguishing displacement of landmarks between the images; generating an edge map for each of the images by a processing module; comparing like regions of at least two edge maps for distinguishing displacement of a landmark between the at least two edge maps, each edge map being constructed of pixels having varying intensity values, wherein each pixel location of a first edge map is compared with a same pixel location of a second edge map, wherein each of the same pixel locations of the at least two edge maps are compared within one another for determining whether each compared pixel location has a different intensity value; and determining an aggregate number of pixel locations having a different intensity value between the at least two edge maps; determining whether the aggregate number is greater than a threshold for indicating displacement of the landmarks between the at least two edge maps; generating an error message to a driver in response to the aggregate number being less than the threshold; validating a functionality of the vision-based imaging system in response to the aggregate number being greater than a threshold; and generating an error message by an output device in response to determining invalidity of the functionality of the vision-based imaging system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification