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useful area 有效面積,可用面積。

useful life

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 本系統由計算機控制步進電動機的運動,進而驅動指針式儀表表針的運動,并且通過高精度ccd攝像機實時獲取表盤圖像數據,同時進行表盤圖像的相關處理,包括圖像分割,閾值確定,圖像二值化,區域標記算法,圓心擬合,有效區域識別提取,區域細化等,最終快速識別出表盤指針所處位置;最后,根據國家指針式儀表類檢定規程所制定的算法計算出該儀表的相關誤差,檢定指針式儀表的各種精度,通過這些數據判斷該儀表是否合格,打印該儀表的檢定結果報表。

The results of staff opinion and public opinion surveys conducted independently by the university of hong kong in 2001 indicated high levels of staff and public confidence in the force , identifying useful areas for improved performance 服務質素監察部于二一年委托香港大學獨立進行員工意見調查和公眾意見調查,結果顯示警務人員和市民皆對警隊充滿信心。

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東西的書少而又少。

Texture analysis is a main and useful area of study in pattern recognition 紋理分析是模式識別中一個重要的分支。