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Fix Sobel evaluation for image ROI without isolated border.

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This commit is contained in:
Vitaly Tuzov 2016-09-07 18:30:17 +03:00
parent 26ecf2f374
commit 48f132f35f
4 changed files with 60 additions and 11 deletions
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3
modules/imgproc/src/canny.cpp
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@ -69,6 +69,9 @@ static bool ippCanny(const Mat& _src, const Mat& dx_, const Mat& dy_, Mat& _dst,
CV_INSTRUMENT_REGION_IPP()
#if USE_IPP_CANNY
if (!useCustomDeriv && _src.isSubmatrix())
return false; // IPP Sobel doesn't support transparent ROI border
int size = 0, size1 = 0;
IppiSize roi = { _src.cols, _src.rows };

6
modules/imgproc/src/deriv.cpp
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@ -307,7 +307,7 @@ static bool IPPDerivSobel(InputArray _src, OutputArray _dst, int ddepth, int dx,
{
CV_INSTRUMENT_REGION_IPP()
if ((borderType != BORDER_REPLICATE) || ((3 != ksize) && (5 != ksize)))
if (((borderType & ~BORDER_ISOLATED) != BORDER_REPLICATE) || ((3 != ksize) && (5 != ksize)))
return false;
if (fabs(delta) > FLT_EPSILON)
return false;
@ -317,6 +317,10 @@ static bool IPPDerivSobel(InputArray _src, OutputArray _dst, int ddepth, int dx,
int bufSize = 0;
cv::AutoBuffer<char> buffer;
Mat src = _src.getMat(), dst = _dst.getMat();
if ((borderType & BORDER_ISOLATED) == 0 && src.isSubmatrix())
return false;
if ( ddepth < 0 )
ddepth = src.depth();

12
modules/imgproc/test/ocl/test_canny.cpp
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@ -99,11 +99,7 @@ OCL_TEST_P(Canny, Accuracy)
generateTestData();
const double low_thresh = 50.0, high_thresh = 100.0;
double eps = 1e-2;
#ifdef ANDROID
if (cv::ocl::Device::getDefault().isNVidia())
eps = 12e-3;
#endif
double eps = 12e-3;
OCL_OFF(cv::Canny(src_roi, dst_roi, low_thresh, high_thresh, aperture_size, useL2gradient));
OCL_ON(cv::Canny(usrc_roi, udst_roi, low_thresh, high_thresh, aperture_size, useL2gradient));
@ -117,11 +113,7 @@ OCL_TEST_P(Canny, AccuracyCustomGradient)
generateTestData();
const double low_thresh = 50.0, high_thresh = 100.0;
double eps = 1e-2;
#ifdef ANDROID
if (cv::ocl::Device::getDefault().isNVidia())
eps = 12e-3;
#endif
double eps = 12e-3;
OCL_OFF(cv::Canny(src_roi, dst_roi, low_thresh, high_thresh, aperture_size, useL2gradient));
OCL_ON(

50
modules/imgproc/test/test_filter.cpp
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@ -2015,3 +2015,53 @@ TEST(Imgproc_Morphology, iterated)
ASSERT_EQ(0.0, norm(dst0, dst2, NORM_INF));
}
}
TEST(Imgproc_Sobel, borderTypes)
{
int kernelSize = 3;
/// ksize > src_roi.size()
Mat src = (Mat_<uchar>(3, 3) << 1, 2, 3, 4, 5, 6, 7, 8, 9), dst, expected_dst;
Mat src_roi = src(Rect(1, 1, 1, 1));
src_roi.setTo(cv::Scalar::all(0));
// should work like !BORDER_ISOLATED, so the function MUST read values in full matrix
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REPLICATE);
EXPECT_EQ(8, dst.at<short>(0, 0));
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REFLECT);
EXPECT_EQ(8, dst.at<short>(0, 0));
// should work like BORDER_ISOLATED
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REPLICATE | BORDER_ISOLATED);
EXPECT_EQ(0, dst.at<short>(0, 0));
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REFLECT | BORDER_ISOLATED);
EXPECT_EQ(0, dst.at<short>(0, 0));
/// ksize <= src_roi.size()
src = Mat(5, 5, CV_8UC1, cv::Scalar(5));
src_roi = src(Rect(1, 1, 3, 3));
src_roi.setTo(0);
// should work like !BORDER_ISOLATED, so the function MUST read values in full matrix
expected_dst =
(Mat_<short>(3, 3) << -15, 0, 15, -20, 0, 20, -15, 0, 15);
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REPLICATE);
EXPECT_EQ(expected_dst.type(), dst.type());
EXPECT_EQ(expected_dst.size(), dst.size());
EXPECT_DOUBLE_EQ(0.0, cvtest::norm(expected_dst, dst, NORM_INF));
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REFLECT);
EXPECT_EQ(expected_dst.type(), dst.type());
EXPECT_EQ(expected_dst.size(), dst.size());
EXPECT_DOUBLE_EQ(0.0, cvtest::norm(expected_dst, dst, NORM_INF));
// should work like !BORDER_ISOLATED, so the function MUST read values in full matrix
expected_dst = Mat::zeros(3, 3, CV_16SC1);
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REPLICATE | BORDER_ISOLATED);
EXPECT_EQ(expected_dst.type(), dst.type());
EXPECT_EQ(expected_dst.size(), dst.size());
EXPECT_DOUBLE_EQ(0.0, cvtest::norm(expected_dst, dst, NORM_INF));
Sobel(src_roi, dst, CV_16S, 1, 0, kernelSize, 1, 0, BORDER_REFLECT | BORDER_ISOLATED);
EXPECT_EQ(expected_dst.type(), dst.type());
EXPECT_EQ(expected_dst.size(), dst.size());
EXPECT_DOUBLE_EQ(0.0, cvtest::norm(expected_dst, dst, NORM_INF));
}