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Commit 5775ace5 authored by k-shinotsuka's avatar k-shinotsuka
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improve thresh_8u()

parent b34272f8
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Showing with 109 additions and 112 deletions
modules/imgproc/src/thresh.cpp
View file @ 5775ace5
......@@ -49,8 +49,6 @@ namespace cv
static void
thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
{
int i, j, j_scalar = 0;
uchar tab[256];
Size roi = _src.size();
roi.width *= _src.channels();
size_t src_step = _src.step;
......@@ -125,59 +123,22 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
}
#endif
switch( type )
{
case THRESH_BINARY:
for( i = 0; i <= thresh; i++ )
tab[i] = 0;
for( ; i < 256; i++ )
tab[i] = maxval;
break;
case THRESH_BINARY_INV:
for( i = 0; i <= thresh; i++ )
tab[i] = maxval;
for( ; i < 256; i++ )
tab[i] = 0;
break;
case THRESH_TRUNC:
for( i = 0; i <= thresh; i++ )
tab[i] = (uchar)i;
for( ; i < 256; i++ )
tab[i] = thresh;
break;
case THRESH_TOZERO:
for( i = 0; i <= thresh; i++ )
tab[i] = 0;
for( ; i < 256; i++ )
tab[i] = (uchar)i;
break;
case THRESH_TOZERO_INV:
for( i = 0; i <= thresh; i++ )
tab[i] = (uchar)i;
for( ; i < 256; i++ )
tab[i] = 0;
break;
default:
CV_Error( CV_StsBadArg, "Unknown threshold type" );
}
int j = 0;
const uchar* src = _src.ptr();
uchar* dst = _dst.ptr();
#if CV_SSE2
if( checkHardwareSupport(CV_CPU_SSE2) )
if( (roi.width >= 8) && checkHardwareSupport(CV_CPU_SSE2) )
{
__m128i _x80 = _mm_set1_epi8('\x80');
__m128i thresh_u = _mm_set1_epi8(thresh);
__m128i thresh_s = _mm_set1_epi8(thresh ^ 0x80);
__m128i maxval_ = _mm_set1_epi8(maxval);
j_scalar = roi.width & -8;
for( i = 0; i < roi.height; i++ )
switch( type )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
switch( type )
case THRESH_BINARY:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
case THRESH_BINARY:
for( j = 0; j <= roi.width - 32; j += 32 )
{
__m128i v0, v1;
......@@ -198,9 +159,12 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
v0 = _mm_and_si128( v0, maxval_ );
_mm_storel_epi64( (__m128i*)(dst + j), v0 );
}
break;
}
break;
case THRESH_BINARY_INV:
case THRESH_BINARY_INV:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for( j = 0; j <= roi.width - 32; j += 32 )
{
__m128i v0, v1;
......@@ -221,9 +185,12 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
v0 = _mm_andnot_si128( v0, maxval_ );
_mm_storel_epi64( (__m128i*)(dst + j), v0 );
}
break;
}
break;
case THRESH_TRUNC:
case THRESH_TRUNC:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for( j = 0; j <= roi.width - 32; j += 32 )
{
__m128i v0, v1;
......@@ -241,9 +208,12 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
v0 = _mm_subs_epu8( v0, _mm_subs_epu8( v0, thresh_u ));
_mm_storel_epi64( (__m128i*)(dst + j), v0 );
}
break;
}
break;
case THRESH_TOZERO:
case THRESH_TOZERO:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for( j = 0; j <= roi.width - 32; j += 32 )
{
__m128i v0, v1;
......@@ -261,9 +231,12 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
v0 = _mm_and_si128( v0, _mm_cmpgt_epi8(_mm_xor_si128(v0, _x80), thresh_s ));
_mm_storel_epi64( (__m128i*)(dst + j), v0 );
}
break;
}
break;
case THRESH_TOZERO_INV:
case THRESH_TOZERO_INV:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for( j = 0; j <= roi.width - 32; j += 32 )
{
__m128i v0, v1;
......@@ -281,86 +254,110 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
v0 = _mm_andnot_si128( _mm_cmpgt_epi8(_mm_xor_si128(v0, _x80), thresh_s ), v0 );
_mm_storel_epi64( (__m128i*)(dst + j), v0 );
}
break;
}
break;
}
}
#elif CV_NEON
uint8x16_t v_thresh = vdupq_n_u8(thresh), v_maxval = vdupq_n_u8(maxval);
switch( type )
if( roi.width >= 16 )
{
case THRESH_BINARY:
for( i = 0; i < roi.height; i++ )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
for ( j_scalar = 0; j_scalar <= roi.width - 16; j_scalar += 16)
vst1q_u8(dst + j_scalar, vandq_u8(vcgtq_u8(vld1q_u8(src + j_scalar), v_thresh), v_maxval));
}
break;
case THRESH_BINARY_INV:
for( i = 0; i < roi.height; i++ )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
for ( j_scalar = 0; j_scalar <= roi.width - 16; j_scalar += 16)
vst1q_u8(dst + j_scalar, vandq_u8(vcleq_u8(vld1q_u8(src + j_scalar), v_thresh), v_maxval));
}
break;
uint8x16_t v_thresh = vdupq_n_u8(thresh), v_maxval = vdupq_n_u8(maxval);
case THRESH_TRUNC:
for( i = 0; i < roi.height; i++ )
switch( type )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
for ( j_scalar = 0; j_scalar <= roi.width - 16; j_scalar += 16)
vst1q_u8(dst + j_scalar, vminq_u8(vld1q_u8(src + j_scalar), v_thresh));
}
break;
case THRESH_BINARY:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for ( j = 0; j <= roi.width - 16; j += 16)
vst1q_u8(dst + j, vandq_u8(vcgtq_u8(vld1q_u8(src + j), v_thresh), v_maxval));
}
break;
case THRESH_TOZERO:
for( i = 0; i < roi.height; i++ )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
case THRESH_BINARY_INV:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for ( j = 0; j <= roi.width - 16; j += 16)
vst1q_u8(dst + j, vandq_u8(vcleq_u8(vld1q_u8(src + j), v_thresh), v_maxval));
}
break;
for ( j_scalar = 0; j_scalar <= roi.width - 16; j_scalar += 16)
case THRESH_TRUNC:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
uint8x16_t v_src = vld1q_u8(src + j_scalar), v_mask = vcgtq_u8(v_src, v_thresh);
vst1q_u8(dst + j_scalar, vandq_u8(v_mask, v_src));
for ( j = 0; j <= roi.width - 16; j += 16)
vst1q_u8(dst + j, vminq_u8(vld1q_u8(src + j), v_thresh));
}
}
break;
break;
case THRESH_TOZERO_INV:
for( i = 0; i < roi.height; i++ )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
case THRESH_TOZERO:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
for ( j = 0; j <= roi.width - 16; j += 16)
{
uint8x16_t v_src = vld1q_u8(src + j), v_mask = vcgtq_u8(v_src, v_thresh);
vst1q_u8(dst + j, vandq_u8(v_mask, v_src));
}
}
break;
for ( j_scalar = 0; j_scalar <= roi.width - 16; j_scalar += 16)
case THRESH_TOZERO_INV:
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
uint8x16_t v_src = vld1q_u8(src + j_scalar), v_mask = vcleq_u8(v_src, v_thresh);
vst1q_u8(dst + j_scalar, vandq_u8(v_mask, v_src));
for ( j = 0; j <= roi.width - 16; j += 16)
{
uint8x16_t v_src = vld1q_u8(src + j), v_mask = vcleq_u8(v_src, v_thresh);
vst1q_u8(dst + j, vandq_u8(v_mask, v_src));
}
}
break;
}
break;
default:
return CV_Error( CV_StsBadArg, "" );
}
#endif
int j_scalar = j;
if( j_scalar < roi.width )
{
for( i = 0; i < roi.height; i++ )
const int thresh_pivot = thresh + 1;
uchar tab[256];
switch( type )
{
case THRESH_BINARY:
memset(tab, 0, thresh_pivot);
if (thresh_pivot < 256) {
memset(tab + thresh_pivot, maxval, 256 - thresh_pivot);
}
break;
case THRESH_BINARY_INV:
memset(tab, maxval, thresh_pivot);
if (thresh_pivot < 256) {
memset(tab + thresh_pivot, 0, 256 - thresh_pivot);
}
break;
case THRESH_TRUNC:
for( int i = 0; i <= thresh; i++ )
tab[i] = (uchar)i;
if (thresh_pivot < 256) {
memset(tab + thresh_pivot, thresh, 256 - thresh_pivot);
}
break;
case THRESH_TOZERO:
memset(tab, 0, thresh_pivot);
for( int i = thresh_pivot; i < 256; i++ )
tab[i] = (uchar)i;
break;
case THRESH_TOZERO_INV:
for( int i = 0; i <= thresh; i++ )
tab[i] = (uchar)i;
if (thresh_pivot < 256) {
memset(tab + thresh_pivot, 0, 256 - thresh_pivot);
}
break;
}
src = _src.ptr();
dst = _dst.ptr();
for( int i = 0; i < roi.height; i++, src += src_step, dst += dst_step )
{
const uchar* src = _src.ptr() + src_step*i;
uchar* dst = _dst.ptr() + dst_step*i;
j = j_scalar;
#if CV_ENABLE_UNROLLED
for( ; j <= roi.width - 4; j += 4 )
......
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