基于ACSS角点定位的液晶显示仪表示值识别算法

针对工业现场具有复杂背景的液晶显示仪表示值识别困难的问题,提出一种基于 ACSS(Advanced Curvature Scale Space,改进曲率尺度空间)角点定位的示值识别方法。首先根据ACSS角点检测原理设计出适合于检测示值框顶点的方法,以定位示值区域；其次利用字符的灰度特性确定字符串区域并对字符串进行分块局部二值化,以切分字符串；最后通过三线扫描法识别字符。对热能表示值的识别实验证明了该方法具有较强的鲁棒性和适应性。

Recognition Algorithm for Display Value of LCD Meter Based on the ACSS Corner Localization

In view of the problem of recognition for the value of LCD meter under the industrial field with complex background, an algorithm based on ACSS corner localization is proposed. Firstly, according to the principle of ACSS corner detection, a method which can be suitable to detect vertices of the value area is designed to locate the area. Secondly, the gradation characteristics of the display value is used to determine the area of the string, the local threshold is used to binary the string and then split the string. Finally, three-line scanning method is used to identify the character. Experimental results for heat meter prove the robustness and adaptability of the proposed algorithm.