SYSTEM AND METHOD FOR EFFICIENT IMAGE FEATURE EXTRACTION
First Claim
1. A system for efficient image feature extraction, comprisinga buffer for storing a slice of at least a first plurality n of lines of gradient direction pixel values of a directional gradient image, said buffer havinga buffer input for receiving said first plurality n of lines anda buffer output for providing a second plurality m of columns of gradient direction pixel values of said slice to a score network input of a score network, said score network comprising:
- a plurality of comparators for comparing said gradient direction pixel values of said second plurality of columns with corresponding reference gradient direction pixel values of a reference directional gradient pattern of a shape; and
a plurality of adders for providing partial score values depending on output values of said comparators to one or more score network outputs, said one or more score network outputs coupled to one or more corresponding accumulation network inputs ofan accumulation network havingan accumulation network output for providing a final score value depending on said partial score values.
31 Assignments
0 Petitions
Accused Products
Abstract
A system for efficient image feature extraction comprises a buffer for storing a slice of at least n lines of gradient direction pixel values of a directional gradient image. The buffer has an input for receiving the first plurality n of lines and an output for providing a second plurality m of columns of gradient direction pixel values of the slice to an input of a score network, which comprises comparators for comparing the gradient direction pixel values of the second plurality of columns with corresponding reference values of a reference directional gradient pattern of a shape and adders for providing partial scores depending on output values of the comparators to score network outputs which are coupled to corresponding inputs of an accumulation network having an output for providing a final score depending on the partial scores.
-
Citations
18 Claims
-
1. A system for efficient image feature extraction, comprising
a buffer for storing a slice of at least a first plurality n of lines of gradient direction pixel values of a directional gradient image, said buffer having a buffer input for receiving said first plurality n of lines and a buffer output for providing a second plurality m of columns of gradient direction pixel values of said slice to a score network input of a score network, said score network comprising: -
a plurality of comparators for comparing said gradient direction pixel values of said second plurality of columns with corresponding reference gradient direction pixel values of a reference directional gradient pattern of a shape; and a plurality of adders for providing partial score values depending on output values of said comparators to one or more score network outputs, said one or more score network outputs coupled to one or more corresponding accumulation network inputs of an accumulation network having an accumulation network output for providing a final score value depending on said partial score values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16, 17)
-
-
12. An image feature extraction method, comprising:
-
storing a slice of at least a first plurality n of lines of gradient direction pixel values of a directional gradient image in a buffer; providing a second plurality m of columns of gradient direction pixel values of said slice to a score network input of a score network; comparing said gradient direction pixel values of said second plurality of columns with corresponding reference gradient direction pixel values of a reference directional gradient pattern of a shape; providing partial score values depending on result values of said comparisons; and providing a final score value depending on said partial score values. - View Dependent Claims (13, 14, 18)
-
Specification