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spatialGradient: Per row in outer loop

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This commit is contained in:
Seon-Wook Park 2015-06-19 05:30:05 +02:00
parent e633c991b0
commit 2ff614dfab
1 changed files with 41 additions and 58 deletions
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99
modules/imgproc/src/spatialgradient.cpp
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@ -186,39 +186,40 @@ void spatialGradient( InputArray _src, OutputArray _dx, OutputArray _dy, int ksi
v_two = v_setall_s16(2),
v_sdx1, v_sdx2, v_sdy1, v_sdy2;
// Go through 16-column chunks at a time
for ( j = 1; j < W - 1 - 15; j += 16 )
for ( i = 1; i < H - 1; i++ )
{
// Load top two rows for 3x3 Sobel filter
idx = W + j;
v_um = v_load(&p_src[idx - W - 1]);
v_un = v_load(&p_src[idx - W]);
v_up = v_load(&p_src[idx - W + 1]);
v_expand(v_um, v_um1, v_um2);
v_expand(v_un, v_un1, v_un2);
v_expand(v_up, v_up1, v_up2);
v_smm1 = v_reinterpret_as_s16(v_um1);
v_smm2 = v_reinterpret_as_s16(v_um2);
v_smn1 = v_reinterpret_as_s16(v_un1);
v_smn2 = v_reinterpret_as_s16(v_un2);
v_smp1 = v_reinterpret_as_s16(v_up1);
v_smp2 = v_reinterpret_as_s16(v_up2);
v_um = v_load(&p_src[idx - 1]);
v_un = v_load(&p_src[idx]);
v_up = v_load(&p_src[idx + 1]);
v_expand(v_um, v_um1, v_um2);
v_expand(v_un, v_un1, v_un2);
v_expand(v_up, v_up1, v_up2);
v_snm1 = v_reinterpret_as_s16(v_um1);
v_snm2 = v_reinterpret_as_s16(v_um2);
v_snn1 = v_reinterpret_as_s16(v_un1);
v_snn2 = v_reinterpret_as_s16(v_un2);
v_snp1 = v_reinterpret_as_s16(v_up1);
v_snp2 = v_reinterpret_as_s16(v_up2);
for ( i = 1; i < H - 1; i++ )
// 16-column chunks at a time
for ( j = 1; j < W - 1 - 15; j += 16 )
{
// Load top row for 3x3 Sobel filter
idx = i*W + j;
v_um = v_load(&p_src[idx - W - 1]);
v_un = v_load(&p_src[idx - W]);
v_up = v_load(&p_src[idx - W + 1]);
v_expand(v_um, v_um1, v_um2);
v_expand(v_un, v_un1, v_un2);
v_expand(v_up, v_up1, v_up2);
v_smm1 = v_reinterpret_as_s16(v_um1);
v_smm2 = v_reinterpret_as_s16(v_um2);
v_smn1 = v_reinterpret_as_s16(v_un1);
v_smn2 = v_reinterpret_as_s16(v_un2);
v_smp1 = v_reinterpret_as_s16(v_up1);
v_smp2 = v_reinterpret_as_s16(v_up2);
// Load second row for 3x3 Sobel filter
v_um = v_load(&p_src[idx - 1]);
v_un = v_load(&p_src[idx]);
v_up = v_load(&p_src[idx + 1]);
v_expand(v_um, v_um1, v_um2);
v_expand(v_un, v_un1, v_un2);
v_expand(v_up, v_up1, v_up2);
v_snm1 = v_reinterpret_as_s16(v_um1);
v_snm2 = v_reinterpret_as_s16(v_um2);
v_snn1 = v_reinterpret_as_s16(v_un1);
v_snn2 = v_reinterpret_as_s16(v_un2);
v_snp1 = v_reinterpret_as_s16(v_up1);
v_snp2 = v_reinterpret_as_s16(v_up2);
// Load last row for 3x3 Sobel filter
v_um = v_load(&p_src[idx + W - 1]);
v_un = v_load(&p_src[idx + W]);
@ -246,35 +247,17 @@ void spatialGradient( InputArray _src, OutputArray _dx, OutputArray _dy, int ksi
v_store(&p_dx[idx+8], v_sdx2);
v_store(&p_dy[idx], v_sdy1);
v_store(&p_dy[idx+8], v_sdy2);
// Shift loaded rows up one
v_smm1 = v_snm1;
v_smm2 = v_snm2;
v_smn1 = v_snn1;
v_smn2 = v_snn2;
v_smp1 = v_snp1;
v_smp2 = v_snp2;
v_snm1 = v_spm1;
v_snm2 = v_spm2;
v_snn1 = v_spn1;
v_snn2 = v_spn2;
v_snp1 = v_spp1;
v_snp2 = v_spp2;
idx += W;
}
}
// Cleanup
int end_j = j;
for ( i = 1; i < H - 1; i++ )
for ( j = end_j; j < W - 1; j++ )
{
idx = i*W + j;
p_dx[idx] = -(p_src[idx-W-1] + 2*p_src[idx-1] + p_src[idx+W-1]) +
(p_src[idx-W+1] + 2*p_src[idx+1] + p_src[idx+W+1]);
p_dy[idx] = -(p_src[idx-W-1] + 2*p_src[idx-W] + p_src[idx-W+1]) +
(p_src[idx+W-1] + 2*p_src[idx+W] + p_src[idx+W+1]);
// Cleanup
for ( ; j < W - 1; j++ )
{
idx = i*W + j;
p_dx[idx] = -(p_src[idx-W-1] + 2*p_src[idx-1] + p_src[idx+W-1]) +
(p_src[idx-W+1] + 2*p_src[idx+1] + p_src[idx+W+1]);
p_dy[idx] = -(p_src[idx-W-1] + 2*p_src[idx-W] + p_src[idx-W+1]) +
(p_src[idx+W-1] + 2*p_src[idx+W] + p_src[idx+W+1]);
}
}
#else
for ( i = 1; i < H - 1; i++ )