利用图像空间和Hough参数空间的点－线对偶性，把图像空间中的检测问题转换到参数空间。通过在参数空间里进行简单的累加统计，然后在Hough参数空间寻找累加器峰值的方法检测直线。-Use of image space and Hough parameter space point- line duality theorem, the detection problems in image space transformation to the parameter space. Through simple accumulative statistics in parameter space, and then in the Hough parameter space to find the peak of the accumulator method to detect straight lines.