Как написано выше в комментариях, я закончил деформировать изображение, а затем вырезать его.Это выглядит примерно так
if (points != null) {
Point p1 = points[0];
Point p2 = points[1];
Point p3 = points[2];
Point p4 = points[3];
MatOfPoint2f src = new MatOfPoint2f(
p1,
p2,
p3,
p4);
drawMarker(frame, p1, new Scalar(255,0,0), 0, 20, 1);
drawMarker(frame, p2, new Scalar(255,0,0), 0, 20, 1);
drawMarker(frame, p3, new Scalar(255,0,0), 0, 20, 1);
drawMarker(frame, p4, new Scalar(255,0,0), 0, 20, 1);
double x = p2.x - p1.x;
double y = p3.y - p2.y;
MatOfPoint2f dst = new MatOfPoint2f(
new Point(0, 0),
new Point(x,0),
new Point(0,y),
new Point(x,y)
);
Mat warpMat = Imgproc.getPerspectiveTransform(src, dst);
//This is you new image as Mat
Mat destImage = new Mat();
Imgproc.warpPerspective(bw2, destImage, warpMat, new Size(x, y));
List<Mat> cells = getCells(destImage, destImage.width() / 9, destImage.height / 9);
}
private List<Mat> getCells(Mat m, int width, int height) {
Size cellSize = new Size(width, height);
List<Mat> cells = new ArrayList<>();
for (int row = 0; row < 9; row++) {
for (int col = 0; col < 9; col++) {
Rect rect = new Rect(new Point(col * width, row * height), cellSize);
Mat digit = new Mat(m, rect).clone();
cells.add(digit);
}
}
return cells;
}