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[move sift.cpp] Update sift.cpp

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original commit: cb7b59f203
This commit is contained in:
Suleyman TURKMEN 2016-12-22 23:29:12 +03:00
parent 99d914ea3b
commit 8be0a3452d
1 changed files with 5 additions and 3 deletions
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8
modules/features2d/src/sift.cpp
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@ -185,10 +185,12 @@ static Mat createInitialImage( const Mat& img, bool doubleImageSize, float sigma
{
Mat gray, gray_fpt;
if( img.channels() == 3 || img.channels() == 4 )
{
cvtColor(img, gray, COLOR_BGR2GRAY);
gray.convertTo(gray_fpt, DataType<sift_wt>::type, SIFT_FIXPT_SCALE, 0);
}
else
img.copyTo(gray);
gray.convertTo(gray_fpt, DataType<sift_wt>::type, SIFT_FIXPT_SCALE, 0);
img.convertTo(gray_fpt, DataType<sift_wt>::type, SIFT_FIXPT_SCALE, 0);
float sig_diff;
@ -196,7 +198,7 @@ static Mat createInitialImage( const Mat& img, bool doubleImageSize, float sigma
{
sig_diff = sqrtf( std::max(sigma * sigma - SIFT_INIT_SIGMA * SIFT_INIT_SIGMA * 4, 0.01f) );
Mat dbl;
resize(gray_fpt, dbl, Size(gray.cols*2, gray.rows*2), 0, 0, INTER_LINEAR);
resize(gray_fpt, dbl, Size(gray_fpt.cols*2, gray_fpt.rows*2), 0, 0, INTER_LINEAR);
GaussianBlur(dbl, dbl, Size(), sig_diff, sig_diff);
return dbl;
}