Title :
An Improved HT Algorithm on Straight Line Detection Based on Freeman Chain Code
Author :
Li, Chao ; Wang, Zhong ; Li, Lin
Author_Institution :
State Key Lab. of Precision Meas. Technol. & Instrum., Tianjin Univ., Tianjin, China
Abstract :
Straight line detection has a great significance in the area of image processing, the conventional Hough transform (HT) algorithm used to detect a straight line has to process a large mount of data, so it needs more storage space and the calculation time is too long. This paper presents an improved HT algorithm on straight line detection based on Freeman chain code. It extracts the Freeman chain codes of the pixels in the sub-line segment elements, and transforms them to the angle codes in the polar coordinates space. Constraint the angle searching area of the pixels, so that the calculation speed can be improved. Experiment shows that compared with the Standard Hough transform (SHT), the calculation time of this algorithm reduces to 1/28 ~ 1/75.
Keywords :
Hough transforms; image coding; image segmentation; object detection; Freeman chain code; angle codes; angle searching area; image processing; polar coordinates space; standard Hough transform; straight line detection; subline segment elements; Area measurement; Chaos; Data mining; Image processing; Image storage; Instruments; Laboratories; Satellites; Space technology; Time measurement;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5304629
