Title:
ビジョンシステムでラインを検出するためのシステム及び方法
Document Type and Number:
Japanese Patent JP6934026
Kind Code:
B2
Abstract:
This invention provides a system and method for finding multiple line features in an image. Two related steps are used to identify line features. First, the process computes x and y-components of the gradient field at each image location, projects the gradient field over a plurality subregions, and detects a plurality of gradient extrema, yielding a plurality of edge points with position and gradient. Next, the process iteratively chooses two edge points, fits a model line to them, and if edge point gradients are consistent with the model, computes the full set of inlier points whose position and gradient are consistent with that model. The candidate line with greatest inlier count is retained and the set of remaining outlier points is derived. The process then repeatedly applies the line fitting operation on this and subsequent outlier sets to find a plurality of line results. The process can be exhaustive RANSAC-based.
Inventors:
Shu, Yufen
Jacobson, Lowell Dee.
Li, David Wye.
Jacobson, Lowell Dee.
Li, David Wye.
Application Number:
JP2019000018A
Publication Date:
September 08, 2021
Filing Date:
January 03, 2019
Export Citation:
Assignee:
Cognex Corporation
International Classes:
G06T7/60
Domestic Patent References:
| JP200747933A | ||||
| JP2003187220A | ||||
| JP2002288634A | ||||
| JP926307A | ||||
| JP2015501060A |
Other References:
小野口一則,“2章 CCDカメラを用いたレーンマーカの検出”,映像情報メディア学会誌,日本,一般社団法人映像情報メディア学会,2014年10月 1日,第68巻, 第10号,p.775-779
Mohd Ashri Abu Hassan, 外3名,"Evaluation of Sobel, Canny, Shen & Castan using sample line histogram method",2008 International Symposium on Information Technology,米国,IEEE,2008年 8月28日
Mohd Ashri Abu Hassan, 外3名,"Evaluation of Sobel, Canny, Shen & Castan using sample line histogram method",2008 International Symposium on Information Technology,米国,IEEE,2008年 8月28日
Attorney, Agent or Firm:
Hiroyuki Kurihara