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cv::resize (INTER_AREA CV_16S, CV_32F)

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This commit is contained in:
Ilya Lavrenov
2014-10-12 10:45:46 -07:00
parent 4ed696d770
commit 1b01e1fe68
2 changed files with 144 additions and 11 deletions
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modules/imgproc/test/test_imgwarp.cpp
+34 -9
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@@ -1548,9 +1548,28 @@ TEST(Imgproc_GetQuadSubPix, accuracy) { CV_GetQuadSubPixTest test; test.safe_run
//////////////////////////////////////////////////////////////////////////
template <typename T, typename WT>
struct IntCast
{
T operator() (WT val) const
{
return cv::saturate_cast<T>(val >> 2);
}
};
template <typename T, typename WT>
struct FltCast
{
T operator() (WT val) const
{
return cv::saturate_cast<T>(val * 0.25);
}
};
template <typename T, typename WT, int one, typename CastOp>
void resizeArea(const cv::Mat & src, cv::Mat & dst)
{
int cn = src.channels();
CastOp castOp;
for (int y = 0; y < dst.rows; ++y)
{
@@ -1565,9 +1584,9 @@ void resizeArea(const cv::Mat & src, cv::Mat & dst)
for (int c = 0; c < cn; ++c)
{
WT sum = WT(sptr0[x1 + c]) + WT(sptr0[x1 + c + cn]);
sum += WT(sptr1[x1 + c]) + WT(sptr1[x1 + c + cn]) + (WT)(2);
sum += WT(sptr1[x1 + c]) + WT(sptr1[x1 + c + cn]) + (WT)(one);
dptr[x + c] = cv::saturate_cast<T>(sum >> 2);
dptr[x + c] = castOp(sum);
}
}
}
@@ -1575,32 +1594,38 @@ void resizeArea(const cv::Mat & src, cv::Mat & dst)
TEST(Resize, Area_half)
{
const int size = 10;
int types[] = { CV_8UC1, CV_8UC4, CV_16UC1, CV_16UC4 };
const int size = 1000;
int types[] = { CV_8UC1, CV_8UC4, CV_16UC1, CV_16UC4, CV_16SC1, CV_16SC4, CV_32FC1, CV_32FC4 };
cv::RNG rng(17);
for (int i = 0, _size = sizeof(types) / sizeof(types[0]); i < _size; ++i)
{
int type = types[i], depth = CV_MAT_DEPTH(type);
int type = types[i], depth = CV_MAT_DEPTH(type), cn = CV_MAT_CN(type);
const float eps = depth <= CV_32S ? 0 : 5e-5;
SCOPED_TRACE(depth);
SCOPED_TRACE(cn);
cv::Mat src(size, size, type), dst_actual(size >> 1, size >> 1, type),
dst_reference(size >> 1, size >> 1, type);
rng.fill(src, cv::RNG::UNIFORM, 0, 1000, true);
rng.fill(src, cv::RNG::UNIFORM, -1000, 1000, true);
if (depth == CV_8U)
resizeArea<uchar, ushort>(src, dst_reference);
resizeArea<uchar, ushort, 2, IntCast<uchar, ushort> >(src, dst_reference);
else if (depth == CV_16U)
resizeArea<ushort, int>(src, dst_reference);
resizeArea<ushort, uint, 2, IntCast<ushort, uint> >(src, dst_reference);
else if (depth == CV_16S)
resizeArea<short, int, 2, IntCast<short, int> >(src, dst_reference);
else if (depth == CV_32F)
resizeArea<float, float, 0, FltCast<float, float> >(src, dst_reference);
else
CV_Assert(0);
cv::resize(src, dst_actual, dst_actual.size(), 0, 0, cv::INTER_AREA);
ASSERT_EQ(0, cvtest::norm(dst_reference, dst_actual, cv::NORM_INF));
ASSERT_GE(eps, cvtest::norm(dst_reference, dst_actual, cv::NORM_INF));
}
}