useful area meaning in English
有效面积，可用面积。
Examples
- Texture analysis is a main and useful area of study in pattern recognition
纹理分析是模式识别中一个重要的分支。 - There are very few books that try to cover the basics of a lot of useful areas
真正包含了一些基本的有用的东西的书少而又少。 - In this system , the movement of the step - electromotor is controlled by computer , and then the dial pointer is drove by the step - electromotor . at the same time , these images of the analog instrument are took by high precision ccd video , and then these images will be processed by the computer , using some image - processing algorithms such as image segmentations , threshold identification , image binarization , areas labeling , dial center - point identification , useful areas identification & abstracting , and areas thinning , etc . followed this , the dial pointer of the “ circle ” is able to be located . at last , the dial pointer position will be recognized by the computer
本系统由计算机控制步进电动机的运动,进而驱动指针式仪表表针的运动,并且通过高精度ccd摄像机实时获取表盘图像数据,同时进行表盘图像的相关处理,包括图像分割,阈值确定,图像二值化,区域标记算法,圆心拟合,有效区域识别提取,区域细化等,最终快速识别出表盘指针所处位置;最后,根据国家指针式仪表类检定规程所制定的算法计算出该仪表的相关误差,检定指针式仪表的各种精度,通过这些数据判断该仪表是否合格,打印该仪表的检定结果报表。