Title :
Extraction of straight lines in aerial images
Author :
Venkateswar, V. ; Chellappa, Rama
Author_Institution :
Texas Instruments, Dallas, TX, USA
fDate :
11/1/1992 12:00:00 AM
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;
Journal_Title :
Pattern Analysis and Machine Intelligence, IEEE Transactions on
