[英]Opencv Image segmentation for licence plate
我正在做一个将读取车牌的项目,我的计划是
好吧,问题是:我的代码不是很好,结果很糟糕,我无法检测到矩形,下面是我的代码:
Imgproc.cvtColor(image, image, Imgproc.COLOR_BGR2GRAY, 0);
Imgproc.blur(image, image, new Size(3, 3));
Imgproc.equalizeHist(image, image);
Mat openElem = Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(1, 1));
Mat closeElem = Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(1, 1));
Imgproc.adaptiveThreshold(image, image, 225, Imgproc.ADAPTIVE_THRESH_GAUSSIAN_C, Imgproc.THRESH_BINARY_INV, 11, 2);
输入图像:
输出图像:
如果有经验的人可以帮助我,我将不胜感激
首先,最好是检测图像中印版的位置,只需执行以下步骤:
转换为灰色
cvCvtColor(image,grayScale,CV_BGR2GRAY);
做索贝尔
Mat sobel =新Mat(grayScale.size(),CvType.CV_16S); cvSobel(grayScale,sobel,2,0,7); Mat temp =新Mat(sobel.size(),CvType.CV_8UC1); convertScaleAbs(sobel,temp,0.00390625,0);
阈值
cvThreshold(sobel,threshold,0,255,CV_THRESH_BINARY | CV_THRESH_OTSU);
做形态
Mat kernal = cvCreateStructuringElementEx(3,1,1,0,CV_SHAPE_RECT); cvDilate(阈值,erode_dilate,kernal,2); // X vErode(erode_dilate,erode_dilate,kernal,4); // X cvDilate(erode_dilate,erode_dilate,kernal,2); // X
kernal = cvCreateStructuringElementEx(1,3,0,1,CV_SHAPE_RECT); cvErode(erode_dilate,erode_dilate,kernal,1); // Y cvDilate(erode_dilate,erode_dilate,kernal,2);
希望对您有帮助!
好,这就是我想出的
Imgproc.cvtColor(image, image, Imgproc.COLOR_BGR2GRAY, 0);
originalFrameGrayScale = image.clone();
Mat morph = Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(9, 3));
Imgproc.morphologyEx(image, image, Imgproc.MORPH_TOPHAT, morph);
Imgproc.Sobel(image, image, -1, 2, 0);
Imgproc.GaussianBlur(image, image, new Size(5,5), 3,3);
Imgproc.morphologyEx(image, image, Imgproc.MORPH_CLOSE, morph);
Imgproc.threshold(image, image, 200, 255, Imgproc.THRESH_OTSU);
Vector<Rect> rectangles = detectionContour(image);
并找到高度,宽度和面积与某些值匹配的最大轮廓, 在此处输入图像描述
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.