Dipankar Baghel's profile - activity

thnks for ur quick response....but i didnt know Python..so is it convienient for u give a piece of code in java android...actualy i am developing app in android.....thank you..

I am developing an application in whitch i have to detect the largest rectangle from camera image,and draw the lines.I have used OpenCV for android and i find findContours and drawContours on camera frame but it draw on each object..so my question how to draw line on single largest Rectangle..Here is my code to dra drawContours....

public Mat onCameraFrame(CvCameraViewFrame inputFrame) { mRgba = inputFrame.rgba();

    List<MatOfPoint> contours;
    contours = new ArrayList<MatOfPoint>();
    hierarchy = new Mat();

 Imgproc.Canny(mRgba, mIntermediateMat, 80, 100);
 Imgproc.findContours(mIntermediateMat, contours, hierarchy, Imgproc.RETR_TREE, Imgproc.CHAIN_APPROX_SIMPLE, new Point(0, 0));

 hierarchy.release();
 Imgproc.drawContours(mRgba, contours, -1, new Scalar(Math.random()*255, Math.random()*255, Math.random()*255));//, 2, 8, hierarchy, 0, new Point());


    return mRgba;
}

any help ..........thanks in advance.

I am developing an application in android in whitch i have to detect square document and crop that detected document.

I used sample of OpenCv for cammy image but failed to implement sqare detection with outLine.(Outline may be of any color)