ROTATION HOUGH TRANSFORM

被引:0
|
作者
Du, S. [1 ]
机构
[1] Univ South Africa, Dept Elect & Min Engn, ZA-1710 Florida, South Africa
来源
SAIEE AFRICA RESEARCH JOURNAL | 2014年 / 105卷 / 03期
关键词
Hough transform; rounding errors; HT voting process; straight line detection;
D O I
10.23919/SAIEE.2014.8531534
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This article discusses how image space discretization errors affect the standard Hough transform (SHT). It is observed that the discretization errors are different on various columns, that is, they are related to the. values. Furthermore, the columns corresponding to theta=0 degrees and theta=90 degrees are seen to have the smallest errors. Based on this observation, a new Hough transform (rotation Hough transform, RoHT) is proposed. The given image is rotated by.. and the SHT is employed, generating the HT data on the columns corresponding to theta=0 degrees and theta=90 degrees only. After the image is rotated 90 degrees/Delta theta times, the HT columns generated are registered to the HT matrix of the original image. In this way, only theta=0 degrees and theta=90 degrees are used to calculate the votes for each cell in HT space, and the errors are minimized. The experiments verified the performance of the proposed method.
引用
收藏
页码:127 / 130
页数:4
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