公开(公告)号：US20180047167A1

公开(公告)日：2018-02-15

申请号：US15236488

申请日：2016-08-15

Applicant: Macau University of Science and Technology

Inventor： Yi XU ,  Jiaxiang CHEN

IPC: G06T7/00

CPC classification number: G06T7/12 ,  G06T7/0085 ,  G06T7/0097 ,  G06T7/13 ,  G06T7/155 ,  G06T7/55 ,  G06T2207/10032 ,  G06T2207/20012 ,  G06T2207/20044 ,  G06T2207/30181

Abstract: A computer system executes a method that detects an edge of an object with a Canny operator. The method calculates a gradient strength of pixels of the image and applies non-maximum suppression to the image to avoid spurious responses to edge detection. The image is divided into multiple partitions based on a brightness distribution of the pixels in the image and a set of dynamic threshold values. Multiple images for the partitions are superimposed to detect an edge of the object.