Hi. I’m new at OpenCV. Especially, I’m learning android at the same time, so I’m struggling to make an android application that using OpenCV.
I wanna divide picture into vertical blocks(groups of matOfKeyPoints) and get pixel(by x, y coordinate) to compare with another coulmn's pixel.
I got gray colored and cropped image.
And made the image black&white by adaptiveThreshold().
I got MatOfKeyPoint by FeatureDetector.FAST as 3rd image(It's a result of drawKeyPoints(Default flag)).
1. I need to get representative coulmn by user’s selection. So I wanna divide points groups vertically.
2. Then I wanna get values *red ones* that computed from comparison with representative column’s points’ x, y coordinate. (The representative column has values *blue ones* input by user.)
Below code is Detection(Button)'s OnClickListener. Thank you.
```java
private class findButtonOnClickListener implements View.OnClickListener {
MatOfKeyPoint matOfKeyPoints;
FeatureDetector endDetector;
@Override
public void onClick(View view) {
matOfKeyPoints = new MatOfKeyPoint();
endDetector = FeatureDetector.create(FeatureDetector.FAST);
endDetector.detect(mat, matOfKeyPoints);
Scalar color = new Scalar(0, 0, 255); // BGR
Features2d.drawKeypoints(mat, matOfKeyPoints, mat, color, 0);
Utils.matToBitmap(mat, bitmap);
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
procImage.setImageBitmap(bitmap);
procImage.invalidate();
bitmap = bitmapOrigin.copy(bitmapOrigin.getConfig(), true);
mat = matOrigin.clone();
}
}
```
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