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I want to find all points in the rectangle. But when i use findContour method in opencv, it actually finds points in the lines drawn ( Not points inside the rectangle). I verified using drawcontour method ( even if we use thickness as -1, it draws lines ).

How can i find points inside the smaller rectangle using findContour method ?

//srcMatrix create

Mat srcMat = new Mat(); srcMat.create(100, 100, CvType.8UC3);

// create a canny matrix

Mat mCanny = new Mat();

// Make it to sizeof srcMatrix and // make channel to 1 mCanny.create( srcMat.cols(), srcMat.rows, CvType.8UC1)

// clear it

mCanny.setTo(new Scalar(0));

// draw a border rectangle on the mcanny

Core.rectangle(mCanny, new Point(0,0), new Point(100, 100), new Scalar(255));

// draw a rectangle

Core.rectangle(mCanny, new Point(25,25), new Point(50, 50), new Scalar(255));

// make it binary image

Imgproc.cvtColor(mCanny , mCanny , Imgproc.COLOR_RGB2GRAY);

// make it blur

Imgproc.blur( mCanny, mCanny, new Size(3,3));

//find canny

Imgproc.Canny(mCanny ,mCanny, 2,4);

/// find Contour

List<matofpoint> contours = new ArrayList<matofpoint>(); Imgproc.findContours(mCanny, contours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);

I want to find all points in the rectangle. But when i use findContour method in opencv, it actually finds points in the lines drawn ( Not points inside the rectangle). I verified using drawcontour method ( even if we use thickness as -1, it draws lines ).

How can i find points inside the smaller rectangle using findContour method ?

//srcMatrix create

Mat srcMat = new Mat(); srcMat.create(100, 100, CvType.8UC3);

// create a canny matrix

Mat mCanny = new Mat();

// Make it to sizeof srcMatrix and // make channel to 1 1

mCanny.create( srcMat.cols(), srcMat.rows, CvType.8UC1)

// clear it

mCanny.setTo(new Scalar(0));

// draw a border rectangle on the mcanny

Core.rectangle(mCanny, new Point(0,0), new Point(100, 100), new Scalar(255));

// draw a rectangle

Core.rectangle(mCanny, new Point(25,25), new Point(50, 50), new Scalar(255));

// make it binary image

Imgproc.cvtColor(mCanny , mCanny , Imgproc.COLOR_RGB2GRAY);

// make it blur

Imgproc.blur( mCanny, mCanny, new Size(3,3));

//find canny

Imgproc.Canny(mCanny ,mCanny, 2,4);

/// find Contour

List<matofpoint> contours = new ArrayList<matofpoint>(); Imgproc.findContours(mCanny, contours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);

I want to find all points in the rectangle. But when i use findContour method in opencv, it actually finds points in the lines drawn ( Not points inside the rectangle). I verified using drawcontour method ( even if we use thickness as -1, it draws lines ).

How can i find points inside the smaller rectangle using findContour method ?

//srcMatrix create

Mat srcMat = new Mat(); srcMat.create(100, 100, CvType.8UC3);

// create a canny matrix

Mat mCanny = new Mat();

// Make it to sizeof srcMatrix and // make channel to 1

mCanny.create( srcMat.cols(), srcMat.rows, CvType.8UC1)

// clear it

mCanny.setTo(new Scalar(0));

// draw a border rectangle on the mcanny

Core.rectangle(mCanny, new Point(0,0), new Point(100, 100), new Scalar(255));

// draw a rectangle

Core.rectangle(mCanny, new Point(25,25), new Point(50, 50), new Scalar(255));

// make it binary image

Imgproc.cvtColor(mCanny , mCanny , Imgproc.COLOR_RGB2GRAY);

// make it blur

Imgproc.blur( mCanny, mCanny, new Size(3,3));

//find canny

Imgproc.Canny(mCanny ,mCanny, 2,4);

/// find Contour

List<matofpoint> contours = new ArrayList<matofpoint>(); ArrayList<matofpoint>();

Imgproc.findContours(mCanny, contours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);

I want to find all points in the rectangle. But when i use findContour method in opencv, it actually finds points in the lines drawn ( Not points inside the rectangle). I verified using drawcontour method ( even if we use thickness as -1, it draws lines ).

How can i find points inside the smaller rectangle using findContour method ?

//srcMatrix create
 
create
Mat srcMat = new Mat();
srcMat.create(100, 100, CvType.8UC3);
 
CvType.8UC3);
// create a canny matrix
 
matrix
Mat mCanny = new Mat();
 
Mat();
// Make it to sizeof srcMatrix and
// make channel to 1
 
1
mCanny.create( srcMat.cols(), srcMat.rows, CvType.8UC1) 
 
 // clear it
 
it
mCanny.setTo(new Scalar(0));
 
Scalar(0));
// draw a border rectangle on the mcanny
 
mcanny
Core.rectangle(mCanny,
new Point(0,0),
new Point(100, 100),
new Scalar(255));
 
Scalar(255));
// draw a rectangle
 
rectangle
Core.rectangle(mCanny,
new Point(25,25),
new Point(50, 50),
new Scalar(255));
 
Scalar(255));
// make it binary image
 
image
Imgproc.cvtColor(mCanny , mCanny , Imgproc.COLOR_RGB2GRAY);
 
Imgproc.COLOR_RGB2GRAY);
// make it blur
 
blur
Imgproc.blur( mCanny, mCanny, new Size(3,3));
 
Size(3,3));
//find canny
 
canny
Imgproc.Canny(mCanny ,mCanny, 2,4); 
 
 /// find Contour
 
List<matofpoint> Contour
List<MatOfPoint> contours = new ArrayList<matofpoint>();
 
ArrayList<MatOfPoint>();
Imgproc.findContours(mCanny,
contours, new Mat(), Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE);Imgproc.CHAIN_APPROX_SIMPLE);