Extraction of straight lines in aerial images

Author

Venkateswar, V. ; Chellappa, Rama

Author_Institution

Texas Instruments, Dallas, TX, USA

Volume

14

Issue

11

fYear

1992

fDate

11/1/1992 12:00:00 AM

Firstpage

1111

Lastpage

1114

Abstract

A straight-line extractor that produces line descriptions from aerial images is described. The input to the line extractor is in the form of an edge image, where the contrast and direction of each edge pixel is specified. The system scans the edge image left to right and top to bottom and assigns a line label for each scanned edge pixel, thereby generating a label image. At the end of this process, each edge pixel has a line label associated with it, and edge pixels that belong to the same line will be assigned the same line label. In addition, with each line label, a record that stores the end points, the average contrast, and the pixel support of the line is generated. The label image is used as a spatial index to further link fragmented lines. The authors also describe techniques for eliminating many of the physically insignificant lines, given that the domain of interpretation is aerial images dominated by man-made objects

Keywords

edge detection; feature extraction; remote sensing; aerial images; edge pixel; feature extraction; image recognition; line descriptions; line label; straight line extraction; Image edge detection; Image generation; Image segmentation; Machine intelligence; Object detection; Pattern analysis; Piecewise linear approximation; Piecewise linear techniques; Pixel; Surface fitting;

fLanguage

English

Journal_Title

Pattern Analysis and Machine Intelligence, IEEE Transactions on

Publisher

ieee

ISSN

0162-8828

Type

jour

DOI

10.1109/34.166627

Filename

166627