Object detection apparatus and storage medium
AssigneeMegaChips Corporation
InventorHiromu Hasegawa
Life of this patent
Estimating the term…
Abstract
Important information about an object is detected using less arithmetic processing. An object detection unit generates an edge image from a color image. The object detection unit evaluates symmetry of an image included in the edge image by performing processing in accordance with the position of a target pixel. The object detection unit identifies a symmetry center pixel forming an object having symmetry. The object detection unit detects an object width for each symmetry center pixel. The object detection unit identifies the width of the object in the vertical direction based on the width of the symmetry center pixels in the vertical direction, and identifies the width of the object in the horizontal direction based on the object width identified for each symmetry center pixel.
Claims32
An object detection apparatus, comprising:
- an image input unit configured to receive an image;
- an image feature quantity extraction unit configured to extract a predetermined image feature quantity from the image to generate a feature-quantity extraction image;
- a symmetry evaluation unit configured to evaluate, for every processing target pixel in the feature-quantity extraction image, first-direction symmetry of an image area around the processing target pixel based on an image feature quantity of pixels around the processing target pixel, and calculate a symmetry width in a first direction, the first-direction symmetry being symmetry in the first direction;
- a center detection unit configured to detect the target pixel as a symmetry center pixel when the evaluated symmetry for the target pixel exceeds a predetermined reference;
- and
- an object area detection unit configured to detect an object width in the first direction for an object having symmetry included in the image based on the symmetry width of each symmetry center pixel, and detect an object width in a second direction orthogonal to the first direction based on distribution of each symmetry center pixel in the second direction.
(canceled)
28-29. (canceled)
31-32. (canceled)
A non-transitory computer-readable storage medium having stored thereon a program enabling a computer to implement an object detection method comprising:
- receiving an image;
- extracting a predetermined image feature quantity from the image to generate a feature-quantity extraction image;
- evaluating, for every processing target pixel in the feature-quantity extraction image, symmetry in a first direction in the image, and a width of the symmetry in the first direction;
- detecting, from a plurality of evaluation pixels, a pixel for which the evaluated symmetry exceeds a predetermined reference as a symmetry center pixel;
- and
- detecting an object width in the first direction for an object having symmetry included in the image based on the symmetry width of each symmetry center pixel, and detecting an object width in a second direction orthogonal to the first direction based on distribution of each symmetry center pixel in the second direction.
34-35. (canceled)
Dependencies are inferred from the claim text.