Introduction - If you have any usage issues, please Google them yourself
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.