Improved Hough Transform and Its Application in Automatic Recognition on Dial Instrument in Power Plants
Liya Zhao · Journal of Northeast Dianli University · 2011
In digital image processing,Hough Transform is widely used in straight line detection of image space,but it has the disadvantages of large memory space occupation and long computing time.Based on analysis of traditional Hough Transform algorithm,aimed at its disadvantages,an improved Hough Transform algorithm is proposed.The memory space of transformation and the amount of computation can be reduced by decreasing the search rang,meanwhile the circle centre can be directly added into accumulator in order to reduce the amount of computation.By using this,the computing time can be greatly shortened.Applied in automatic recognition system for dial instruments in power plants,and compared improved Hough Transform algorithm with traditional Hough Transform algorithm in recognition speed.The experimental results indicate that the algorithm can reduce the memory space and shorten the computing time effectively.