How to identify and fill I shape Contours in javacv?
java, javacv, opencv
Solution
You can archive that using this code
import com.googlecode.javacpp.Loader;
import com.googlecode.javacv.CanvasFrame;
import static com.googlecode.javacpp.Loader.*;
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_highgui.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
import java.io.File;
import javax.swing.JFileChooser;
public class Ishape {
public static void main(String[] args) {
CanvasFrame cnvs=new CanvasFrame("Polygon");
cnvs.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
CvMemStorage storage=CvMemStorage.create();
CvSeq squares = new CvContour();
squares = cvCreateSeq(0, sizeof(CvContour.class), sizeof(CvSeq.class), storage);
JFileChooser f=new JFileChooser();
int result=f.showOpenDialog(f);//show dialog box to choose files
File myfile=null;
String path="";
if(result==0){
myfile=f.getSelectedFile();//selected file taken to myfile
path=myfile.getAbsolutePath();//get the path of the file
}
IplImage src = cvLoadImage(path);//hear path is actual path to image
IplImage gry=cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,1);
cvCvtColor(src, gry, CV_BGR2GRAY);
cvThreshold(gry, gry, 230, 255, CV_THRESH_BINARY_INV);
cvFindContours(gry, storage, squares, Loader.sizeof(CvContour.class), CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE);
CvSeq ss=null;
for (int i=0; i<1; i++)
{
cvDrawContours(gry, squares, CvScalar.WHITE, CV_RGB(248, 18, 18), 1, -1, 8);
ss=cvApproxPoly(squares, sizeof(CvContour.class), storage, CV_POLY_APPROX_DP, 8, 0);
}
IplConvKernel mat=cvCreateStructuringElementEx(7, 7, 3, 3, CV_SHAPE_RECT, null);
cvDilate(gry, gry, mat, CV_C);
cvErode(gry, gry, mat, CV_C);
cnvs.showImage(gry);
}
}
Result
This will be resulted out put and I believe this might help you to solve your problem.
Problem
I'm developing project on javacv and I need to know how to identify following image and fill that Image using particular color ? I try to go through this question and This is the image that I use I try to go through this code and I developed a code in javacv ``` import com.googlecode.javacpp.Loader; import com.googlecode.javacv.CanvasFrame; import static com.googlecode.javacpp.Loader.*; import static com.googlecode.javacv.cpp.opencv_core.*; import static com.googlecode.javacv.cpp.opencv_highgui.*; import static com.googlecode.javacv.cpp.opencv_imgproc.*; import java.io.File; import javax.swing.JFileChooser; public class PolyGonIdentification { public static void main(String[] args) { CanvasFrame cnvs=new CanvasFrame("Polygon"); cnvs.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE); CvMemStorage storage=CvMemStorage.create(); CvSeq squares = new CvContour(); squares = cvCreateSeq(0, sizeof(CvContour.class), sizeof(CvSeq.class), storage); JFileChooser f=new JFileChooser(); int result=f.showOpenDialog(f);//show dialog box to choose files File myfile=null; String path=""; if(result==0){ myfile=f.getSelectedFile();//selected file taken to myfile path=myfile.getAbsolutePath();//get the path of the file } IplImage src = cvLoadImage(path);//hear path is actual path to image IplImage gry=cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,1); cvCvtColor(src, gry, CV_BGR2GRAY); cvThreshold(gry, gry, 230, 255, CV_THRESH_BINARY_INV); cvFindContours(gry, storage, squares, Loader.sizeof(CvContour.class), CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE); System.out.println(squares.total()); for (int i=0; i<squares.total(); i++) { cvDrawContours(gry, squares, CvScalar.ONE, CvScalar.ONE, 127, 1, 8); } IplConvKernel mat=cvCreateStructuringElementEx(7, 7, 3, 3, CV_SHAPE_RECT, null); cvDilate(gry, gry, mat, CV_C); cvErode(gry, gry, mat, CV_C); cnvs.showImage(gry); } } ``` My final result should be like this image Put above code resulted this kind of image. Please can some one help me to resolve this issue ?