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Added the tests for the minEnclosingTriangle function in the existing test_convhull.cpp file.

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Ovidiu Parvu 2013-09-15 22:25:58 +01:00
parent caaa9e0f2d
commit 0117d77cd1
1 changed files with 157 additions and 0 deletions
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157
modules/imgproc/test/test_convhull.cpp
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@ -161,6 +161,22 @@ cvTsPointPolygonTest( CvPoint2D32f pt, const CvPoint2D32f* vv, int n, int* _idx=
return result;
}
static cv::Point2f
cvTsMiddlePoint(const cv::Point2f &a, const cv::Point2f &b)
{
return cv::Point2f((a.x + b.x) / 2, (a.y + b.y) / 2);
}
static bool
cvTsIsPointOnLineSegment(const cv::Point2f &x, const cv::Point2f &a, const cv::Point2f &b)
{
double d1 = cvTsDist(CvPoint2D32f(x.x, x.y), CvPoint2D32f(a.x, a.y));
double d2 = cvTsDist(CvPoint2D32f(x.x, x.y), CvPoint2D32f(b.x, b.y));
double d3 = cvTsDist(CvPoint2D32f(a.x, a.y), CvPoint2D32f(b.x, b.y));
return (abs(d1 + d2 - d3) <= (1E-5));
}
/****************************************************************************************\
* Base class for shape descriptor tests *
@ -769,6 +785,146 @@ _exit_:
}
/****************************************************************************************\
* MinEnclosingTriangle Test *
\****************************************************************************************/
class CV_MinTriangleTest : public CV_BaseShapeDescrTest
{
public:
CV_MinTriangleTest();
protected:
void run_func(void);
int validate_test_results( int test_case_idx );
std::vector<cv::Point2f> getTriangleMiddlePoints();
std::vector<cv::Point2f> convexPolygon;
std::vector<cv::Point2f> triangle;
double area;
};
CV_MinTriangleTest::CV_MinTriangleTest()
{
}
std::vector<cv::Point2f> CV_MinTriangleTest::getTriangleMiddlePoints()
{
std::vector<cv::Point2f> triangleMiddlePoints;
for (int i = 0; i < 3; i++) {
triangleMiddlePoints.push_back(cvTsMiddlePoint(triangle[i], triangle[(i + 1) % 3]));
}
return triangleMiddlePoints;
}
void CV_MinTriangleTest::run_func()
{
std::vector<cv::Point2f> pointsAsVector;
cv::cvarrToMat(points).convertTo(pointsAsVector, CV_32F);
cv::minEnclosingTriangle(pointsAsVector, triangle, area);
cv::convexHull(pointsAsVector, convexPolygon, true, true);
}
int CV_MinTriangleTest::validate_test_results( int test_case_idx )
{
bool errorEnclosed = false, errorMiddlePoints = false, errorFlush = true;
double eps = 1e-4;
int code = CV_BaseShapeDescrTest::validate_test_results( test_case_idx );
#if 0
{
int n = 3;
double a = 8, c = 8, b = 100, d = 150;
CvPoint bp[4], *bpp = bp;
cvNamedWindow( "test", 1 );
IplImage* img = cvCreateImage( cvSize(500,500), 8, 3 );
cvZero(img);
for( i = 0; i < point_count; i++ )
cvCircle(img,cvPoint(cvRound(p[i].x*a+b),cvRound(p[i].y*c+d)), 3, CV_RGB(0,255,0), -1 );
for( i = 0; i < n; i++ )
bp[i] = cvPoint(cvRound(triangle[i].x*a+b),cvRound(triangle[i].y*c+d));
cvPolyLine( img, &bpp, &n, 1, 1, CV_RGB(255,255,0), 1, CV_AA, 0 );
cvShowImage( "test", img );
cvWaitKey();
cvReleaseImage(&img);
}
#endif
int polygonVertices = (int) convexPolygon.size();
if (polygonVertices > 2) {
// Check if all points are enclosed by the triangle
for (int i = 0; (i < polygonVertices) && (!errorEnclosed); i++)
{
if (cv::pointPolygonTest(triangle, cv::Point2f(convexPolygon[i].x, convexPolygon[i].y), true) < (-eps))
errorEnclosed = true;
}
// Check if triangle edges middle points touch the polygon
std::vector<cv::Point2f> middlePoints = getTriangleMiddlePoints();
for (int i = 0; (i < 3) && (!errorMiddlePoints); i++)
{
bool isTouching = false;
for (int j = 0; (j < polygonVertices) && (!isTouching); j++)
{
if (cvTsIsPointOnLineSegment(middlePoints[i], convexPolygon[j],
convexPolygon[(j + 1) % polygonVertices]))
isTouching = true;
}
errorMiddlePoints = (isTouching) ? false : true;
}
// Check if at least one of the edges is flush
for (int i = 0; (i < 3) && (errorFlush); i++)
{
for (int j = 0; (j < polygonVertices) && (errorFlush); j++)
{
if ((cvTsIsPointOnLineSegment(convexPolygon[j], triangle[i],
triangle[(i + 1) % 3])) &&
(cvTsIsPointOnLineSegment(convexPolygon[(j + 1) % polygonVertices], triangle[i],
triangle[(i + 1) % 3])))
errorFlush = false;
}
}
// Report any found errors
if (errorEnclosed)
{
ts->printf( cvtest::TS::LOG,
"All points should be enclosed by the triangle.\n" );
code = cvtest::TS::FAIL_BAD_ACCURACY;
}
else if (errorMiddlePoints)
{
ts->printf( cvtest::TS::LOG,
"All triangle edges middle points should touch the convex hull of the points.\n" );
code = cvtest::TS::FAIL_INVALID_OUTPUT;
}
else if (errorFlush)
{
ts->printf( cvtest::TS::LOG,
"At least one edge of the enclosing triangle should be flush with one edge of the polygon.\n" );
code = cvtest::TS::FAIL_INVALID_OUTPUT;
}
}
if ( code < 0 )
ts->set_failed_test_info( code );
return code;
}
/****************************************************************************************\
* MinEnclosingCircle Test *
\****************************************************************************************/
@ -1691,6 +1847,7 @@ void CV_PerimeterAreaSliceTest::run( int )
TEST(Imgproc_ConvexHull, accuracy) { CV_ConvHullTest test; test.safe_run(); }
TEST(Imgproc_MinAreaRect, accuracy) { CV_MinAreaRectTest test; test.safe_run(); }
TEST(Imgproc_MinTriangle, accuracy) { CV_MinTriangleTest test; test.safe_run(); }
TEST(Imgproc_MinCircle, accuracy) { CV_MinCircleTest test; test.safe_run(); }
TEST(Imgproc_ContourPerimeter, accuracy) { CV_PerimeterTest test; test.safe_run(); }
TEST(Imgproc_FitEllipse, accuracy) { CV_FitEllipseTest test; test.safe_run(); }