指针式指示表的自动读取及 MATLAB 仿真

摘要

According to the recognition of pointer indicator ,the recognition of indicator ’ s reading and simulation of MATLAB is introduced.After computer obtained indicator ’ s digital images,first the image should be pre-processed,including image smoot-hing、image segmentation and expansion refining etc ,then,pass the location of the pointer distilled by the Hough transformation , get the pointer degrees used by the liner relation of the dial scale and its proper angular .Finally,display the result from using the graphical user interface .%针对指针式指示表的自动判读，介绍了指针式指示表的自动读取及MATLAB仿真。计算机获取指示表数字图像后，首先对图像进行预处理，包括图像平滑、图像分割及膨胀细化等步骤，然后通过Hough变换提取出指针所在的位置，通过图形用户界面把度数显示出来，最后利用表盘刻度与角度对应的线性关系得到指针读数。