现代计算机:下半月版
現代計算機:下半月版
현대계산궤:하반월판
Modem Computer
2012年
12期
60-63
,共4页
图像处理%形心搜索%阈值分割%桥梁%LED
圖像處理%形心搜索%閾值分割%橋樑%LED
도상처리%형심수색%역치분할%교량%LED
Image Processing%Center of Figure Searching%Thresholding Segmentation%Bridge%LED
通过摄像杌瞄准桥梁结构上固定的LED灯.对LED灯在图片中的像素坐标进行定位计算,利用计算机优越的数据处理能力可以得到桥梁结构目标部位不同时刻状态下的位移。在对LED灯进行图像识别时,先将图片统一转为灰度图片后对其进行二值化。然后采用形心搜索法计算LED灯形成的亮斑在图像中的像素坐标。通过标定参数转换可将以像素为单位的住移换算为具有物理意义的实际值。
通過攝像杌瞄準橋樑結構上固定的LED燈.對LED燈在圖片中的像素坐標進行定位計算,利用計算機優越的數據處理能力可以得到橋樑結構目標部位不同時刻狀態下的位移。在對LED燈進行圖像識彆時,先將圖片統一轉為灰度圖片後對其進行二值化。然後採用形心搜索法計算LED燈形成的亮斑在圖像中的像素坐標。通過標定參數轉換可將以像素為單位的住移換算為具有物理意義的實際值。
통과섭상올묘준교량결구상고정적LED등.대LED등재도편중적상소좌표진행정위계산,이용계산궤우월적수거처리능력가이득도교량결구목표부위불동시각상태하적위이。재대LED등진행도상식별시,선장도편통일전위회도도편후대기진행이치화。연후채용형심수색법계산LED등형성적량반재도상중적상소좌표。통과표정삼수전환가장이상소위단위적주이환산위구유물리의의적실제치。
LED are fixed at the bridge as target, meanwhile, camera is fixed at a static position relatively. The displacement of the target in different time as the bridge vibrating can be got using superi- or data processing ability of computer. For image distinguishing, the images are changed from raw to grayscale firstly, and then the gray image is transformed by binary processing. The center location of the light spot formed by LED is calculated by cancroids searching method. In order to get the actual measurement value physically, must conduct a calibration, which can tell us a pixel equates how many millimeters.