CAJ | 학술논문

由于使用手持设备的网络型混凝土路面病害巡检评估系统与车载道路检测系统的病害图片处理方法不同，针对使用手持设备的网络型混凝土路面病害巡检评估系统提出一种基于图像处理的可纠正图像畸变的混凝土路面裂缝检测技术。1)使用张定友法对摄像头进行标定，获得摄像头内外参数；2)对路面病害图像进行预处理；然后，通过阈值分割法检测出路面裂缝，根据背景连通域数量的差异，实现了裂缝分类；通过投影法对出横、纵和斜向裂缝实现分类。3)对线性裂缝提取裂缝骨架细化并根据实际版块长宽，求出裂缝长度、平均宽度等病害参数；对于网状裂缝通过求其最小外接矩形计算其破损面积。
유우사용수지설비적망락형혼응토로면병해순검평고계통여차재도로검측계통적병해도편처리방법불동，침대사용수지설비적망락형혼응토로면병해순검평고계통제출일충기우도상처리적가규정도상기변적혼응토로면렬봉검측기술。1)사용장정우법대섭상두진행표정，획득섭상두내외삼수；2)대로면병해도상진행예처리；연후，통과역치분할법검측출로면렬봉，근거배경련통역수량적차이，실현료렬봉분류；통과투영법대출횡、종화사향렬봉실현분류。3)대선성렬봉제취렬봉골가세화병근거실제판괴장관，구출렬봉장도、평균관도등병해삼수；대우망상렬봉통과구기최소외접구형계산기파손면적。
Due to the different of image processing method between pavement disease detection and estimation system with handheld device and road detection system with vehicle,this paper proposes a concrete pavement crack detection method based on image pro-cessing,which can correct image distortion.Firstly,camera calibration is accomplished at first to obtain pterior parameters and exte-rior ones.Secondly,preprocessing is implemented,which includes gray image,gray-scale stretching and median filter.Thirdly, choose threshold segmentation algorithm(OTSU)to segment crack and background.After that,based on the different count of background connection domain between linear crack image and reticular one,classify cracks automatically.Linear crack can be sub-divided to vertical,horizontal and slant crack thought projection method.The length of Linear crack can be obtain by thinning to sin-gle pixel line,then the mean width of linear crack is calculated by its percent of plate pixel count.Finally,the damaged area is calcu-lated with reticular crack minimum enclosing rectangle.