Hello
I'm trying to recognize image contours using OpenCV4 with Android Studio(kotlin).
However, I don't know how to get xpos and ypos value from MatOfPoint variables.
( MatOfPoint variables is output of Imgproc.FindContours )
Do you have any solutions ?
private fun calcPosXY(){
val bitmap = textureView.getBitmap()
var imageMat = Mat()
val contours = ArrayList()
val hierarchy = Mat()
Utils.bitmapToMat(bitmap, imageMat)
Imgproc.cvtColor(imageMat,imageMat,Imgproc.COLOR_RGB2GRAY)
Imgproc.threshold(imageMat, imageMat, 100.0, 255.0, Imgproc.THRESH_BINARY)
Imgproc.findContours(imageMat, contours, hierarchy, Imgproc.RETR_EXTERNAL,Imgproc.CHAIN_APPROX_TC89_L1)
for (contour in contours) {
val approxCurve = MatOfPoint2f()
val contour2f = MatOfPoint2f()
contour.convertTo(contour2f,CvType.CV_32FC2)
val approxDistance = Imgproc.arcLength(contour2f,true) * 0.02
Imgproc.approxPolyDP(contour2f,approxCurve,approxDistance,true)
val points = MatOfPoint() //this variable
approxCurve.convertTo(points,CvType.CV_8UC4)
//
// how to get xpos and ypos value from each points?
// e.g. xpos=327 ypos= 512
//
}
}
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