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This commit is contained in:
Ilya Lavrenov 2012-09-21 17:25:42 +04:00
parent a8ba2d7f52
commit 222303f24b
2 changed files with 19 additions and 14 deletions
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22
modules/imgproc/src/imgwarp.cpp
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@ -1423,7 +1423,7 @@ public:
dsize.width *= cn;
AutoBuffer<WT> _buffer(dsize.width*2);
WT *buf = _buffer, *sum = buf + dsize.width;
int k, sy, dx, cur_dy = 0;
int k = -1000, sy = -1000, dx = -1000, cur_dy = -1000;
WT scale_y = (WT)scale_y_;
CV_Assert( cn <= 4 );
@ -1567,7 +1567,8 @@ public:
T* D = (T*)(dst.data + dst.step*cur_dy);
if( fabs(beta) < 1e-3 )
{
if(cur_dy >= dsize.height) return;
if(cur_dy >= dsize.height)
return;
for( dx = 0; dx < dsize.width; dx++ )
{
D[dx] = saturate_cast<T>((sum[dx] + buf[dx]) / min(scale_y, src.rows - cur_dy * scale_y));
@ -1614,19 +1615,23 @@ private:
resizeArea_Invoker& operator=(const resizeArea_Invoker&);
};
template<typename T, typename WT>
template <typename T, typename WT>
static void resizeArea_( const Mat& src, Mat& dst, const DecimateAlpha* xofs, int xofs_count, double scale_y_)
{
#ifdef HAVE_TBB
Size ssize = src.size(), dsize = dst.size();
AutoBuffer<int> _yofs(2 * ssize.height);
int *yofs = _yofs, *cur_dy_ofs = _yofs + ssize.height;
int index = 0, cur_dy = 0, sy;
int index = 0, cur_dy = 0;
for( sy = 0; sy < ssize.height; sy++ )
// cur_dy_ofs - dy for the current sy
// yofs - a starting row for calculating a band according to the current sy
for (int sy = 0; sy < ssize.height; sy++)
{
bool reset = false;
cur_dy_ofs[sy] = cur_dy;
yofs[sy] = index;
if ((cur_dy + 1) * scale_y_ <= sy + 1 || sy == ssize.height - 1 )
{
WT beta = (WT)std::max(sy + 1 - (cur_dy + 1) * scale_y_, 0.);
@ -1634,13 +1639,10 @@ static void resizeArea_( const Mat& src, Mat& dst, const DecimateAlpha* xofs, in
{
if (cur_dy >= dsize.height)
break;
reset = true;
index = sy + 1;
}
cur_dy++;
}
yofs[sy] = index;
if (reset)
index = sy + 1;
}
#endif

11
modules/imgproc/test/test_imgwarp.cpp
View File

@ -1491,18 +1491,21 @@ TEST(Imgproc_resize_area, regression)
};
cv::Mat src(16, 16, CV_16UC1, input_data);
cv::Mat expected(5,5,CV_16UC1, expected_data);
cv::Mat expected(5, 5, CV_16UC1, expected_data);
cv::Mat actual(expected.size(), expected.type());
cv::resize(src, actual, cv::Size(), 0.3, 0.3, INTER_AREA);
ASSERT_EQ(actual.type(), expected.type());
ASSERT_EQ(actual.size(), expected.size());
Mat diff;
absdiff(actual, expected, diff);
Mat one_channel_diff = diff.reshape(1);
std::cout << "Abs diff:" << std::endl << diff << std::endl;
int elem_diff = 1;
Mat one_channel_diff = diff; //.reshape(1);
float elem_diff = 1.0f;
Size dsize = actual.size();
bool next = true;
for (int dy = 0; dy < dsize.height && next; ++dy)
@ -1527,7 +1530,7 @@ TEST(Imgproc_resize_area, regression)
}
}
ASSERT_EQ(norm(one_channel_diff, cv::NORM_INF),0);
ASSERT_EQ(norm(one_channel_diff, cv::NORM_INF), 0);
}