随着电子技术的发展，指针式仪表的数字化读数成为人们研究应用的热点。
论文给出了一种基于图像处理的指针式仪表数字化读取的技术方案，能够代替人
眼对指针式仪表进行检定和读数，提高了读数的准确性和效率，减少了人工的重
复性劳动。
　　论文首先介绍了与指针式仪表识别设计相关的图像处理知识，包括空间RGB
和YUV模型，灰度图像，图像的预处理方法，边缘检测及Hough变换原理，并在
MATLAB的软件平台上进行了算法仿真。(With the development of the electronic technology, the digital reading of the
pointer instrument is becoming the hotspot. This paper proposes a technical scheme of　pointer instrument digital reading based on image processing. It can replace human's eyes to pointer instrument for verification and readings. It improves the veracity and efficiency, reduces artificial repetitive work. The　paper　firstly　introduces　the　knowledge　of　image　processing　which　is interrelated with pointer instrument identification. It includes RGB and YUV color space model, gray image, the image preprocessing method, edge detection and the principle of Hough transform. Furthermore, the algorithm simulation is made on the MATLAB software platform.)