Apparatus and method that determines whether a pattern within the detection window is a subject based on characteristic amounts obtained from within a first region

摘要

An image processing apparatus includes an image input unit configured to input an image, a scanning unit configured to scan a detection window on the input image, a first discrimination unit configured to determine whether a pattern within the detection window is a subject based on a plurality of characteristic amounts obtained from within a first region among a plurality of regions within the detection window, and a second discrimination unit configured to determine, if it is determined that the pattern is not the subject by the first discrimination unit, whether the pattern is the subject based on a plurality of characteristic amounts obtained from a second region in which a probability that occlusion of the subject occurs is higher than that in the first region among the plurality of regions. Accordingly, a subject can be detected efficiently, and omissions of detection can be reduced.

主权项

1. An image processing apparatus comprising:
a processor comprising:
an image input unit configured to input an image;a scanning unit configured to scan the input image with a moving detection window on the input image;a first discrimination unit configured to determine whether a pattern within the detection window contains a predetermined subject based on a plurality of characteristic amounts obtained from a first region corresponding to a specific part of the predetermined subject within the detection window; anda second discrimination unit configured to determine, if it is not determined that the pattern contains the predetermined subject by the first discrimination unit, whether the pattern within the detection window contains the predetermined subject based on a plurality of characteristic amounts obtained from a second region corresponding to the whole of the predetermined subject within the detection window, wherein if the pattern is determined to be the predetermined subject by the first discrimination unit a determination by the second discrimination unit is omitted for the pattern within the detection window, the first region is smaller than the second region and is placed at a predetermined position within the second region, and a probability of occurring occlusion in the first region is lower than that in the second region other than first region.