1
if (DETECT_RED_OBJECTS_ONLY)
{
Imgproc.cvtColor(inputFrame, gray,
Imgproc.COLOR_BGR2RGB);
}
else
{
Imgproc.cvtColor(inputFrame, gray, Imgproc.COLOR_BGR2GRAY);
}
Imgproc.cvtColor(inputFrame, dst, Imgproc.COLOR_BGR2RGB);
// down-scale and upscale the image to filter out the noise
Imgproc.pyrDown(gray, downscaled, new Size(gray.cols()/2, gray.rows() 2));
Imgproc.pyrUp(downscaled, upscaled, gray.size());
if (DETECT_RED_OBJECTS_ONLY) {
// convert the image from RGBA to HSV
Imgproc.cvtColor(upscaled, hsv, Imgproc.COLOR_RGB2HSV);
// threshold the image for the lower and upper HSV red range
Core.inRange(hsv, HSV_LOW_RED1, HSV_LOW_RED2, lowerRedRange);
Core.inRange(hsv, HSV_HIGH_RED1, HSV_HIGH_RED2, upperRedRange);
// put the two thresholded images together
Core.addWeighted(lowerRedRange, 1.0, upperRedRange, 1.0, 0.0, bw);
// apply canny to get edges only
System.out.println(bw);
Imgproc.Canny(bw, bw, 0, 255);
} else {
// Use Canny instead of threshold to catch squares with gradient shading
Imgproc.Canny(upscaled, bw, 0, 255);
}
// dilate canny output to remove potential
// holes between edge segments
Imgproc.dilate(bw, bw, new Mat(), new Point(-1, 1), 1);
// find contours and store them all as a list
List<MatOfPoint> contours = new ArrayList<MatOfPoint>();
contourImage = bw.clone();
Imgproc.findContours(
contourImage,
contours,
hierarchyOutputVector,
Imgproc.RETR_EXTERNAL,
Imgproc.CHAIN_APPROX_SIMPLE
);
System.out.println("contours" + contours);
// loop over all found contours
for (MatOfPoint cnt : contours) {
MatOfPoint2f curve = new MatOfPoint2f(cnt.toArray());
// approximates a polygonal curve with the specified precision
Imgproc.approxPolyDP(
curve,
approxCurve,
0.02 * Imgproc.arcLength(curve, true),
true
);
int numberVertices = (int) approxCurve.total();
입력 이미지로 삼각형을 사용하면 삼각형이 작동하고 삼각형 [카운터가 1이되고 numberVertices가 3이됩니다]를 감지합니다. 그러나 사각형 이미지를 입력하면 윤곽선은 2가되고 numberVertices는 2가됩니다. 4이어야합니다. 그렇지 않아? 누구든지 버그를 찾을 수 있도록 도와 줄 수 있습니까? 이 최신 Visual Studio에서 사용하는 경우opencv Java의 findContours