[英]Pattern detection in an image with JavaCV
I'm trying to create a code which should at the end recognize some pattern/shape in a picture. 我正在尝试创建一个代码,最终应该识别图片中的某些图案/形状。
I've had some trouble when I tried to draw the shape on the pic ("Output3" in this case). 当我试图在图片上绘制形状时我遇到了一些麻烦(在这种情况下为“Output3”)。 The program seems not to end. 该计划似乎没有结束。 I think there is a infinite loop with the while function. 我认为while函数有一个无限循环。 The program doesn't display the output3. 程序不显示output3。 What's the issue? 有什么问题?
INPUT image: INPUT图片:
OUTPUT2 image: OUTPUT2图片:
public class Hello {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
// Memory storage
CvMemStorage memory = CvMemStorage.create();
CvSeq contours = new CvSeq(null);
// Display original contour image .png, then GRAYSCALE and display in CanvasFrame
IplImage image = cvLoadImage("contour.jpg", CV_LOAD_IMAGE_GRAYSCALE);
CanvasFrame canvas = new CanvasFrame("Output", 1);
CanvasFrame canvas2 = new CanvasFrame("Output2", 1);
CanvasFrame canvas3 = new CanvasFrame("Output3", 1);
canvas.showImage(image);
// thresholding
cvSmooth(image, image, CV_BLUR, 9 , 9, 2, 2);
cvThreshold(image, image, 155, 255, CV_THRESH_BINARY);
cvCanny(image, image, 20*7*7, 40*7*7, 7);
cvDilate(image, image, null, 1);
canvas2.showImage(image);
cvSaveImage("output2.jpg", image);
// finding contours
cvFindContours(image, memory, contours, Loader.sizeof(CvContour.class), CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0));
while(contours != null && !contours.isNull()) {
if(contours.elem_size() > 0) {
CvSeq approx = cvApproxPoly(contours, Loader.sizeof(CvContour.class), memory, CV_POLY_APPROX_DP, (int) cvContourPerimeter(contours)*0.02, 0);
cvDrawContours(image, approx, CvScalar.BLUE, CvScalar.BLUE, -1,1, CV_AA);
}
contours.h_next();
}
canvas3.showImage(image);
}
My goal is to take a photo, send it to the program which should return: 我的目标是拍照,将其发送到应返回的程序:
I don't use JavaCV, but here is what I would do: 我不使用JavaCV,但这是我要做的:
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