/* This is AGAST and OAST, an optimal and accelerated corner detector
based on the accelerated segment tests
Below is the original copyright and the references */
/*
Copyright (C) 2010 Elmar Mair
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
*Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
*Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
*Neither the name of the University of Cambridge nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
The references are:
* Adaptive and Generic Corner Detection Based on the Accelerated Segment Test,
Elmar Mair and Gregory D. Hager and Darius Burschka
and Michael Suppa and Gerhard Hirzinger ECCV 2010
URL: http://www6.in.tum.de/Main/ResearchAgast
*/
#include "agast_score.hpp"
#ifdef _MSC_VER
#pragma warning( disable : 4127 )
#endif
namespace cv
{
void makeAgastOffsets(int pixel[16], int rowStride, int type)
{
static const int offsets16[][2] =
{
{-3, 0}, {-3, -1}, {-2, -2}, {-1, -3}, {0, -3}, { 1, -3}, { 2, -2}, { 3, -1},
{ 3, 0}, { 3, 1}, { 2, 2}, { 1, 3}, {0, 3}, {-1, 3}, {-2, 2}, {-3, 1}
};
static const int offsets12d[][2] =
{
{-3, 0}, {-2, -1}, {-1, -2}, {0, -3}, { 1, -2}, { 2, -1},
{ 3, 0}, { 2, 1}, { 1, 2}, {0, 3}, {-1, 2}, {-2, 1}
};
static const int offsets12s[][2] =
{
{-2, 0}, {-2, -1}, {-1, -2}, {0, -2}, { 1, -2}, { 2, -1},
{ 2, 0}, { 2, 1}, { 1, 2}, {0, 2}, {-1, 2}, {-2, 1}
};
static const int offsets8[][2] =
{
{-1, 0}, {-1, -1}, {0, -1}, { 1, -1},
{ 1, 0}, { 1, 1}, {0, 1}, {-1, 1}
};
const int (*offsets)[2] = type == AgastFeatureDetector::OAST_9_16 ? offsets16 :
type == AgastFeatureDetector::AGAST_7_12d ? offsets12d :
type == AgastFeatureDetector::AGAST_7_12s ? offsets12s :
type == AgastFeatureDetector::AGAST_5_8 ? offsets8 : 0;
CV_Assert(pixel && offsets);
int k = 0;
for( ; k < 16; k++ )
pixel[k] = offsets[k][0] + offsets[k][1] * rowStride;
}
// 16 pixel mask
template<>
int agast_cornerScore<AgastFeatureDetector::OAST_9_16>(const uchar* ptr, const int pixel[], int threshold)
{
int bmin = threshold;
int bmax = 255;
int b_test = (bmax + bmin) / 2;
short offset0 = (short) pixel[0];
short offset1 = (short) pixel[1];
short offset2 = (short) pixel[2];
short offset3 = (short) pixel[3];
short offset4 = (short) pixel[4];
short offset5 = (short) pixel[5];
short offset6 = (short) pixel[6];
short offset7 = (short) pixel[7];
short offset8 = (short) pixel[8];
short offset9 = (short) pixel[9];
short offset10 = (short) pixel[10];
short offset11 = (short) pixel[11];
short offset12 = (short) pixel[12];
short offset13 = (short) pixel[13];
short offset14 = (short) pixel[14];
short offset15 = (short) pixel[15];
while(true)
{
const int cb = *ptr + b_test;
const int c_b = *ptr - b_test;
if(ptr[offset0] > cb)
if(ptr[offset2] > cb)
if(ptr[offset4] > cb)
if(ptr[offset5] > cb)
if(ptr[offset7] > cb)
if(ptr[offset3] > cb)
if(ptr[offset1] > cb)
if(ptr[offset6] > cb)
if(ptr[offset8] > cb)
goto is_a_corner;
else
if(ptr[offset15] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if(ptr[offset13] > cb)
if(ptr[offset14] > cb)
if(ptr[offset15] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if(ptr[offset8] > cb)
if(ptr[offset9] > cb)
if(ptr[offset10] > cb)
if(ptr[offset6] > cb)
goto is_a_corner;
else
if(ptr[offset11] > cb)
if(ptr[offset12] > cb)
if(ptr[offset13] > cb)
if(ptr[offset14] > cb)
if(ptr[offset15] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if(ptr[offset10] > cb)
if(ptr[offset11] > cb)
if(ptr[offset12] > cb)
if(ptr[offset8] > cb)
if(ptr[offset9] > cb)
if(ptr[offset6] > cb)
goto is_a_corner;
else
if(ptr[offset13] > cb)
if(ptr[offset14] > cb)
if(ptr[offset15] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if(ptr[offset1] > cb)
if(ptr[offset13] > cb)
if(ptr[offset14] > cb)
if(ptr[offset15] > cb)
goto is_a_corner;
else
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opencv-4.4.0.zip
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opencv-4.4.0.zip (2000个子文件)
jidctint.c 180KB
pngrtran.c 164KB
jfdctint.c 155KB
png.c 154KB
tif_dirread.c 153KB
pngrutil.c 144KB
pngread.c 139KB
jidctint.c 104KB
tif_fax3sm.c 102KB
tif_dirwrite.c 89KB
jpc_qmfb.c 85KB
jpc_enc.c 81KB
enc_mips_dsp_r2.c 80KB
tif_jpeg.c 79KB
pngwutil.c 78KB
tif_getimage.c 78KB
deflate.c 77KB
tif_ojpeg.c 76KB
pngwrite.c 75KB
dec_neon.c 68KB
jpc_dec.c 68KB
vp8l_enc.c 67KB
vp8l_dec.c 59KB
anim_encode.c 57KB
inflate.c 54KB
enc_sse2.c 53KB
jas_icc.c 51KB
tif_dir.c 50KB
tif_dirinfo.c 50KB
pngset.c 50KB
tif_read.c 50KB
jpc_cs.c 50KB
dec_mips_dsp_r2.c 50KB
jchuff.c 49KB
quant_enc.c 48KB
jquant2.c 48KB
jdhuff.c 48KB
jquant2.c 47KB
dec_sse2.c 47KB
histogram_enc.c 46KB
ittnotify_static.c 46KB
tif_fax3.c 45KB
jdmarker.c 45KB
tif_luv.c 44KB
jmemmgr.c 44KB
picture_csp_enc.c 43KB
tif_pixarlog.c 43KB
trees.c 43KB
cpu-features.c 42KB
jdmarker.c 42KB
jas_image.c 42KB
lossless_enc.c 42KB
jmemmgr.c 40KB
dec_msa.c 40KB
jas_cm.c 39KB
lossless_mips_dsp_r2.c 38KB
enc_neon.c 36KB
enc_mips32.c 35KB
jchuff.c 34KB
backward_references_enc.c 34KB
pngget.c 33KB
yuv_sse2.c 33KB
tif_lzw.c 33KB
jcphuff.c 33KB
enc_msa.c 32KB
jquant1.c 32KB
jas_stream.c 32KB
demux.c 31KB
pngpread.c 31KB
predictor_enc.c 31KB
jquant1.c 31KB
idec_dec.c 30KB
jpc_t1enc.c 30KB
lossless_sse2.c 30KB
webp_dec.c 29KB
jpc_t1dec.c 29KB
jcarith.c 29KB
filter_msa_intrinsics.c 29KB
backward_references_cost_enc.c 29KB
lossless_enc_sse2.c 29KB
pngerror.c 28KB
frame_enc.c 28KB
jdcolor.c 28KB
upsampling_msa.c 28KB
frame_dec.c 28KB
jcarith.c 28KB
dec_mips32.c 27KB
jdmaster.c 27KB
dec.c 27KB
jp2_cod.c 27KB
tif_write.c 26KB
jdhuff.c 26KB
jas_iccdata.c 26KB
lossless_neon.c 26KB
jdcoefct.c 25KB
filter_vsx_intrinsics.c 25KB
jdcoefct.c 25KB
pngtrans.c 25KB
jdarith.c 25KB
jdinput.c 24KB
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