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demosaicing.cpp
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demosaicing.cpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009-2010, Willow Garage Inc., all rights reserved.
// Copyright (C) 2014, Itseez Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's 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.
//
// * The name of the copyright holders may not 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 Intel Corporation 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.
//
//M*/
/********************************* COPYRIGHT NOTICE *******************************\
Original code for Bayer->BGR/RGB conversion is provided by Dirk Schaefer
from MD-Mathematische Dienste GmbH. Below is the copyright notice:
IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
By downloading, copying, installing or using the software you agree
to this license. If you do not agree to this license, do not download,
install, copy or use the software.
Contributors License Agreement:
Copyright (c) 2002,
MD-Mathematische Dienste GmbH
Im Defdahl 5-10
44141 Dortmund
Germany
www.md-it.de
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.
The name of Contributor may not 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 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.
\**********************************************************************************/
#include "precomp.hpp"
#include "opencv2/core/hal/intrin.hpp"
#include <limits>
#define CV_DESCALE(x,n) (((x) + (1 << ((n)-1))) >> (n))
namespace cv
{
//////////////////////////// Bayer Pattern -> RGB conversion /////////////////////////////
template<typename T>
class SIMDBayerStubInterpolator_
{
public:
int bayer2Gray(const T*, int, T*, int, int, int, int) const
{
return 0;
}
int bayer2RGB(const T*, int, T*, int, int) const
{
return 0;
}
int bayer2RGBA(const T*, int, T*, int, int, const T) const
{
return 0;
}
int bayer2RGB_EA(const T*, int, T*, int, int) const
{
return 0;
}
};
#if CV_SIMD128
class SIMDBayerInterpolator_8u
{
public:
int bayer2Gray(const uchar* bayer, int bayer_step, uchar* dst,
int width, int bcoeff, int gcoeff, int rcoeff) const
{
#if CV_NEON
uint16x8_t masklo = vdupq_n_u16(255);
const uchar* bayer_end = bayer + width;
for( ; bayer <= bayer_end - 18; bayer += 14, dst += 14 )
{
uint16x8_t r0 = vld1q_u16((const ushort*)bayer);
uint16x8_t r1 = vld1q_u16((const ushort*)(bayer + bayer_step));
uint16x8_t r2 = vld1q_u16((const ushort*)(bayer + bayer_step*2));
uint16x8_t b1_ = vaddq_u16(vandq_u16(r0, masklo), vandq_u16(r2, masklo));
uint16x8_t b1 = vextq_u16(b1_, b1_, 1);
uint16x8_t b0 = vaddq_u16(b1_, b1);
// b0 = b0 b2 b4 ...
// b1 = b1 b3 b5 ...
uint16x8_t g0 = vaddq_u16(vshrq_n_u16(r0, 8), vshrq_n_u16(r2, 8));
uint16x8_t g1 = vandq_u16(r1, masklo);
g0 = vaddq_u16(g0, vaddq_u16(g1, vextq_u16(g1, g1, 1)));
uint16x8_t rot = vextq_u16(g1, g1, 1);
g1 = vshlq_n_u16(rot, 2);
// g0 = b0 b2 b4 ...
// g1 = b1 b3 b5 ...
r0 = vshrq_n_u16(r1, 8);
r1 = vaddq_u16(r0, vextq_u16(r0, r0, 1));
r0 = vshlq_n_u16(r0, 2);
// r0 = r0 r2 r4 ...
// r1 = r1 r3 r5 ...
b0 = vreinterpretq_u16_s16(vqdmulhq_n_s16(vreinterpretq_s16_u16(b0), (short)(rcoeff*2)));
b1 = vreinterpretq_u16_s16(vqdmulhq_n_s16(vreinterpretq_s16_u16(b1), (short)(rcoeff*4)));
g0 = vreinterpretq_u16_s16(vqdmulhq_n_s16(vreinterpretq_s16_u16(g0), (short)(gcoeff*2)));
g1 = vreinterpretq_u16_s16(vqdmulhq_n_s16(vreinterpretq_s16_u16(g1), (short)(gcoeff*2)));
r0 = vreinterpretq_u16_s16(vqdmulhq_n_s16(vreinterpretq_s16_u16(r0), (short)(bcoeff*2)));
r1 = vreinterpretq_u16_s16(vqdmulhq_n_s16(vreinterpretq_s16_u16(r1), (short)(bcoeff*4)));
g0 = vaddq_u16(vaddq_u16(g0, b0), r0);
g1 = vaddq_u16(vaddq_u16(g1, b1), r1);
uint8x8x2_t p = vzip_u8(vrshrn_n_u16(g0, 2), vrshrn_n_u16(g1, 2));
vst1_u8(dst, p.val[0]);
vst1_u8(dst + 8, p.val[1]);
}
#else
v_uint16x8 _b2y = v_setall_u16((ushort)(rcoeff*2));
v_uint16x8 _g2y = v_setall_u16((ushort)(gcoeff*2));
v_uint16x8 _r2y = v_setall_u16((ushort)(bcoeff*2));
const uchar* bayer_end = bayer + width;
for( ; bayer <= bayer_end - 18; bayer += 14, dst += 14 )
{
v_uint16x8 r0 = v_reinterpret_as_u16(v_load(bayer));
v_uint16x8 r1 = v_reinterpret_as_u16(v_load(bayer+bayer_step));
v_uint16x8 r2 = v_reinterpret_as_u16(v_load(bayer+bayer_step*2));
v_uint16x8 b1 = v_add(v_shr<7>(v_shl<8>(r0)), v_shr<7>(v_shl<8>(r2)));
v_uint16x8 b0 = v_add(v_rotate_right<1>(b1), b1);
b1 = v_shl<1>(v_rotate_right<1>(b1));
v_uint16x8 g0 = v_add(v_shr<7>(r0), v_shr<7>(r2));
v_uint16x8 g1 = v_shr<7>(v_shl<8>(r1));
g0 = v_add(g0, v_add(v_rotate_right<1>(g1), g1));
g1 = v_shl<2>(v_rotate_right<1>(g1));
r0 = v_shr<8>(r1);
r1 = v_shl<2>(v_add(v_rotate_right<1>(r0), r0));
r0 = v_shl<3>(r0);
g0 = v_shr<2>(v_add(v_add(v_mul_hi(b0, _b2y), v_mul_hi(g0, _g2y)), v_mul_hi(r0, _r2y)));
g1 = v_shr<2>(v_add(v_add(v_mul_hi(b1, _b2y), v_mul_hi(g1, _g2y)), v_mul_hi(r1, _r2y)));
v_uint8x16 pack_lo, pack_hi;
v_zip(v_pack_u(v_reinterpret_as_s16(g0), v_reinterpret_as_s16(g0)),
v_pack_u(v_reinterpret_as_s16(g1), v_reinterpret_as_s16(g1)),
pack_lo, pack_hi);
v_store(dst, pack_lo);
}
#endif
return (int)(bayer - (bayer_end - width));
}
int bayer2RGB(const uchar* bayer, int bayer_step, uchar* dst, int width, int blue) const
{
/*
B G B G | B G B G | B G B G | B G B G
G R G R | G R G R | G R G R | G R G R
B G B G | B G B G | B G B G | B G B G
*/
#if CV_NEON
uint16x8_t masklo = vdupq_n_u16(255);
uint8x16x3_t pix;
const uchar* bayer_end = bayer + width;
for( ; bayer <= bayer_end - 18; bayer += 14, dst += 42 )
{
uint16x8_t r0 = vld1q_u16((const ushort*)bayer);
uint16x8_t r1 = vld1q_u16((const ushort*)(bayer + bayer_step));
uint16x8_t r2 = vld1q_u16((const ushort*)(bayer + bayer_step*2));
uint16x8_t b1 = vaddq_u16(vandq_u16(r0, masklo), vandq_u16(r2, masklo));
uint16x8_t nextb1 = vextq_u16(b1, b1, 1);
uint16x8_t b0 = vaddq_u16(b1, nextb1);
// b0 b1 b2 ...
uint8x8x2_t bb = vzip_u8(vrshrn_n_u16(b0, 2), vrshrn_n_u16(nextb1, 1));
pix.val[1-blue] = vcombine_u8(bb.val[0], bb.val[1]);
uint16x8_t g0 = vaddq_u16(vshrq_n_u16(r0, 8), vshrq_n_u16(r2, 8));
uint16x8_t g1 = vandq_u16(r1, masklo);
g0 = vaddq_u16(g0, vaddq_u16(g1, vextq_u16(g1, g1, 1)));
g1 = vextq_u16(g1, g1, 1);
// g0 g1 g2 ...
uint8x8x2_t gg = vzip_u8(vrshrn_n_u16(g0, 2), vmovn_u16(g1));
pix.val[1] = vcombine_u8(gg.val[0], gg.val[1]);
r0 = vshrq_n_u16(r1, 8);
r1 = vaddq_u16(r0, vextq_u16(r0, r0, 1));
// r0 r1 r2 ...
uint8x8x2_t rr = vzip_u8(vmovn_u16(r0), vrshrn_n_u16(r1, 1));
pix.val[1+blue] = vcombine_u8(rr.val[0], rr.val[1]);
vst3q_u8(dst-1, pix);
}
#else
v_uint16x8 delta1 = v_setall_u16(1), delta2 = v_setall_u16(2);
v_uint16x8 mask = v_setall_u16(blue < 0 ? (ushort)(-1) : 0);
v_uint16x8 masklo = v_setall_u16(0x00ff);
v_uint8x16 z = v_setzero_u8();
const uchar* bayer_end = bayer + width;
for( ; bayer <= bayer_end - 18; bayer += 14, dst += 42 )
{
v_uint16x8 r0 = v_reinterpret_as_u16(v_load(bayer));
v_uint16x8 r1 = v_reinterpret_as_u16(v_load(bayer+bayer_step));
v_uint16x8 r2 = v_reinterpret_as_u16(v_load(bayer+bayer_step*2));
v_uint16x8 b1 = v_add(v_and(r0, masklo), v_and(r2, masklo));
v_uint16x8 nextb1 = v_rotate_right<1>(b1);
v_uint16x8 b0 = v_add(b1, nextb1);
b1 = v_shr<1>(v_add(nextb1, delta1));
b0 = v_shr<2>(v_add(b0, delta2));
// b0 b2 ... b14 b1 b3 ... b15
b0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(b0), v_reinterpret_as_s16(b1)));
v_uint16x8 g0 = v_add(v_shr<8>(r0), v_shr<8>(r2));
v_uint16x8 g1 = v_and(r1, masklo);
g0 = v_add(g0, v_add(v_rotate_right<1>(g1), g1));
g1 = v_rotate_right<1>(g1);
g0 = v_shr<2>(v_add(g0, delta2));
// g0 g2 ... g14 g1 g3 ... g15
g0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(g0), v_reinterpret_as_s16(g1)));
r0 = v_shr<8>(r1);
r1 = v_add(v_rotate_right<1>(r0), r0);
r1 = v_shr<1>(v_add(r1, delta1));
// r0 r2 ... r14 r1 r3 ... r15
r0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(r0), v_reinterpret_as_s16(r1)));
b1 = v_and(v_xor(b0, r0), mask);
b0 = v_xor(b0, b1);
r0 = v_xor(r0, b1);
// b1 g1 b3 g3 b5 g5...
v_uint8x16 pack_lo, pack_hi;
v_zip(v_reinterpret_as_u8(b0), v_reinterpret_as_u8(g0), pack_lo, pack_hi);
b1 = v_reinterpret_as_u16(pack_hi);
// b0 g0 b2 g2 b4 g4 ....
b0 = v_reinterpret_as_u16(pack_lo);
// r1 0 r3 0 r5 0 ...
v_zip(v_reinterpret_as_u8(r0), z, pack_lo, pack_hi);
r1 = v_reinterpret_as_u16(pack_hi);
// r0 0 r2 0 r4 0 ...
r0 = v_reinterpret_as_u16(pack_lo);
// 0 b0 g0 r0 0 b2 g2 r2 ...
v_zip(b0, r0, g0, g1);
g0 = v_reinterpret_as_u16(v_rotate_left<1>(v_reinterpret_as_u8(g0)));
// 0 b8 g8 r8 0 b10 g10 r10 ...
g1 = v_reinterpret_as_u16(v_rotate_left<1>(v_reinterpret_as_u8(g1)));
// b1 g1 r1 0 b3 g3 r3 0 ...
v_zip(b1, r1, r0, r1);
// b9 g9 r9 0 b11 g11 r11 0 ...
// 0 b0 g0 r0 b1 g1 r1 0 ...
v_uint32x4 pack32_lo, pack32_hi;
v_zip(v_reinterpret_as_u32(g0), v_reinterpret_as_u32(r0), pack32_lo, pack32_hi);
b0 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_lo)));
// 0 b4 g4 r4 b5 g5 r5 0 ...
b1 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_hi)));
v_store_low(dst-1+0, v_reinterpret_as_u8(b0));
v_store_high(dst-1+6*1, v_reinterpret_as_u8(b0));
v_store_low(dst-1+6*2, v_reinterpret_as_u8(b1));
v_store_high(dst-1+6*3, v_reinterpret_as_u8(b1));
// 0 b8 g8 r8 b9 g9 r9 0 ...
v_zip(v_reinterpret_as_u32(g1), v_reinterpret_as_u32(r1), pack32_lo, pack32_hi);
g0 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_lo)));
// 0 b12 g12 r12 b13 g13 r13 0 ...
g1 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_hi)));
v_store_low(dst-1+6*4, v_reinterpret_as_u8(g0));
v_store_high(dst-1+6*5, v_reinterpret_as_u8(g0));
v_store_low(dst-1+6*6, v_reinterpret_as_u8(g1));
}
#endif
return (int)(bayer - (bayer_end - width));
}
int bayer2RGBA(const uchar* bayer, int bayer_step, uchar* dst, int width, int blue, const uchar alpha) const
{
/*
B G B G | B G B G | B G B G | B G B G
G R G R | G R G R | G R G R | G R G R
B G B G | B G B G | B G B G | B G B G
*/
#if CV_NEON
uint16x8_t masklo = vdupq_n_u16(255);
uint8x16x4_t pix;
const uchar* bayer_end = bayer + width;
pix.val[3] = vdupq_n_u8(alpha);
for( ; bayer <= bayer_end - 18; bayer += 14, dst += 56 )
{
uint16x8_t r0 = vld1q_u16((const ushort*)bayer);
uint16x8_t r1 = vld1q_u16((const ushort*)(bayer + bayer_step));
uint16x8_t r2 = vld1q_u16((const ushort*)(bayer + bayer_step*2));
uint16x8_t b1 = vaddq_u16(vandq_u16(r0, masklo), vandq_u16(r2, masklo));
uint16x8_t nextb1 = vextq_u16(b1, b1, 1);
uint16x8_t b0 = vaddq_u16(b1, nextb1);
// b0 b1 b2 ...
uint8x8x2_t bb = vzip_u8(vrshrn_n_u16(b0, 2), vrshrn_n_u16(nextb1, 1));
pix.val[1-blue] = vcombine_u8(bb.val[0], bb.val[1]);
uint16x8_t g0 = vaddq_u16(vshrq_n_u16(r0, 8), vshrq_n_u16(r2, 8));
uint16x8_t g1 = vandq_u16(r1, masklo);
g0 = vaddq_u16(g0, vaddq_u16(g1, vextq_u16(g1, g1, 1)));
g1 = vextq_u16(g1, g1, 1);
// g0 g1 g2 ...
uint8x8x2_t gg = vzip_u8(vrshrn_n_u16(g0, 2), vmovn_u16(g1));
pix.val[1] = vcombine_u8(gg.val[0], gg.val[1]);
r0 = vshrq_n_u16(r1, 8);
r1 = vaddq_u16(r0, vextq_u16(r0, r0, 1));
// r0 r1 r2 ...
uint8x8x2_t rr = vzip_u8(vmovn_u16(r0), vrshrn_n_u16(r1, 1));
pix.val[1+blue] = vcombine_u8(rr.val[0], rr.val[1]);
vst4q_u8(dst-1, pix);
}
#else
v_uint16x8 delta1 = v_setall_u16(1), delta2 = v_setall_u16(2);
v_uint16x8 mask = v_setall_u16(blue < 0 ? (ushort)(-1) : 0);
v_uint16x8 masklo = v_setall_u16(0x00ff);
v_uint8x16 a = v_setall_u8(alpha);
const uchar* bayer_end = bayer + width;
for( ; bayer <= bayer_end - 18; bayer += 14, dst += 56 )
{
v_uint16x8 r0 = v_reinterpret_as_u16(v_load(bayer));
v_uint16x8 r1 = v_reinterpret_as_u16(v_load(bayer+bayer_step));
v_uint16x8 r2 = v_reinterpret_as_u16(v_load(bayer+bayer_step*2));
v_uint16x8 b1 = v_add(v_and(r0, masklo), v_and(r2, masklo));
v_uint16x8 nextb1 = v_rotate_right<1>(b1);
v_uint16x8 b0 = v_add(b1, nextb1);
b1 = v_shr<1>(v_add(nextb1, delta1));
b0 = v_shr<2>(v_add(b0, delta2));
// b0 b2 ... b14 b1 b3 ... b15
b0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(b0), v_reinterpret_as_s16(b1)));
v_uint16x8 g0 = v_add(v_shr<8>(r0), v_shr<8>(r2));
v_uint16x8 g1 = v_and(r1, masklo);
g0 = v_add(g0, v_add(v_rotate_right<1>(g1), g1));
g1 = v_rotate_right<1>(g1);
g0 = v_shr<2>(v_add(g0, delta2));
// g0 g2 ... g14 g1 g3 ... g15
g0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(g0), v_reinterpret_as_s16(g1)));
r0 = v_shr<8>(r1);
r1 = v_add(v_rotate_right<1>(r0), r0);
r1 = v_shr<1>(v_add(r1, delta1));
// r0 r2 ... r14 r1 r3 ... r15
r0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(r0), v_reinterpret_as_s16(r1)));
b1 = v_and(v_xor(b0, r0), mask);
b0 = v_xor(b0, b1);
r0 = v_xor(r0, b1);
// b1 g1 b3 g3 b5 g5...
v_uint8x16 pack_lo, pack_hi;
v_zip(v_reinterpret_as_u8(b0), v_reinterpret_as_u8(g0), pack_lo, pack_hi);
b1 = v_reinterpret_as_u16(pack_hi);
// b0 g0 b2 g2 b4 g4 ....
b0 = v_reinterpret_as_u16(pack_lo);
// r1 a r3 a r5 a ...
v_zip(v_reinterpret_as_u8(r0), a, pack_lo, pack_hi);
r1 = v_reinterpret_as_u16(pack_hi);
// r0 a r2 a r4 a ...
r0 = v_reinterpret_as_u16(pack_lo);
// a b0 g0 r0 a b2 g2 r2 ...
v_zip(b0, r0, g0, g1);
// a b8 g8 r8 a b10 g10 r10 ...
// b1 g1 r1 a b3 g3 r3 a ...
v_zip(b1, r1, r0, r1);
// b9 g9 r9 a b11 g11 r11 a ...
// a b0 g0 r0 b1 g1 r1 a ...
v_uint32x4 pack32_lo, pack32_hi;
v_zip(v_reinterpret_as_u32(g0), v_reinterpret_as_u32(r0), pack32_lo, pack32_hi);
b0 = v_reinterpret_as_u16(pack32_lo);
// a b4 g4 r4 b5 g5 r5 a ...
b1 = v_reinterpret_as_u16(pack32_hi);
v_store_low(dst-1+0, v_reinterpret_as_u8(b0));
v_store_high(dst-1+8*1, v_reinterpret_as_u8(b0));
v_store_low(dst-1+8*2, v_reinterpret_as_u8(b1));
v_store_high(dst-1+8*3, v_reinterpret_as_u8(b1));
// a b8 g8 r8 b9 g9 r9 a ...
v_zip(v_reinterpret_as_u32(g1), v_reinterpret_as_u32(r1), pack32_lo, pack32_hi);
g0 = v_reinterpret_as_u16(pack32_lo);
// a b12 g12 r12 b13 g13 r13 a ...
g1 = v_reinterpret_as_u16(pack32_hi);
v_store_low(dst-1+8*4, v_reinterpret_as_u8(g0));
v_store_high(dst-1+8*5, v_reinterpret_as_u8(g0));
v_store_low(dst-1+8*6, v_reinterpret_as_u8(g1));
}
#endif
return (int)(bayer - (bayer_end - width));
}
int bayer2RGB_EA(const uchar* bayer, int bayer_step, uchar* dst, int width, int blue) const
{
const uchar* bayer_end = bayer + width;
v_uint16x8 masklow = v_setall_u16(0x00ff);
v_uint16x8 delta1 = v_setall_u16(1), delta2 = v_setall_u16(2);
v_uint16x8 full = v_setall_u16((ushort)(-1));
v_uint8x16 z = v_setzero_u8();
v_uint16x8 mask = v_setall_u16(blue > 0 ? (ushort)(-1) : 0);
for ( ; bayer <= bayer_end - 18; bayer += 14, dst += 42)
{
/*
B G B G | B G B G | B G B G | B G B G
G R G R | G R G R | G R G R | G R G R
B G B G | B G B G | B G B G | B G B G
*/
v_uint16x8 r0 = v_reinterpret_as_u16(v_load(bayer));
v_uint16x8 r1 = v_reinterpret_as_u16(v_load(bayer+bayer_step));
v_uint16x8 r2 = v_reinterpret_as_u16(v_load(bayer+bayer_step*2));
v_uint16x8 b1 = v_add(v_and(r0, masklow), v_and(r2, masklow));
v_uint16x8 nextb1 = v_rotate_right<1>(b1);
v_uint16x8 b0 = v_add(b1, nextb1);
b1 = v_shr<1>(v_add(nextb1, delta1));
b0 = v_shr<2>(v_add(b0, delta2));
// b0 b2 ... b14 b1 b3 ... b15
b0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(b0), v_reinterpret_as_s16(b1)));
// vertical sum
v_uint16x8 r0g = v_shr<8>(r0);
v_uint16x8 r2g = v_shr<8>(r2);
v_uint16x8 sumv = v_shr<1>(v_add(v_add(r0g, r2g), delta1));
// horizontal sum
v_uint16x8 g1 = v_and(r1, masklow);
v_uint16x8 nextg1 = v_rotate_right<1>(g1);
v_uint16x8 sumg = v_shr<1>(v_add(v_add(g1, nextg1), delta1));
// gradients
v_uint16x8 gradv = v_add(v_sub(r0g, r2g), v_sub(r2g, r0g));
v_uint16x8 gradg = v_add(v_sub(nextg1, g1), v_sub(g1, nextg1));
v_uint16x8 gmask = v_gt(gradg, gradv);
v_uint16x8 g0 = v_add(v_and(gmask, sumv), v_and(sumg, v_xor(gmask, full)));
// g0 g2 ... g14 g1 g3 ...
g0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(g0), v_reinterpret_as_s16(nextg1)));
r0 = v_shr<8>(r1);
r1 = v_add(v_rotate_right<1>(r0), r0);
r1 = v_shr<1>(v_add(r1, delta1));
// r0 r2 ... r14 r1 r3 ... r15
r0 = v_reinterpret_as_u16(v_pack_u(v_reinterpret_as_s16(r0), v_reinterpret_as_s16(r1)));
b1 = v_and(v_xor(b0, r0), mask);
b0 = v_xor(b0, b1);
r0 = v_xor(r0, b1);
// b1 g1 b3 g3 b5 g5...
v_uint8x16 pack_lo, pack_hi;
v_zip(v_reinterpret_as_u8(b0), v_reinterpret_as_u8(g0), pack_lo, pack_hi);
b1 = v_reinterpret_as_u16(pack_hi);
// b0 g0 b2 g2 b4 g4 ....
b0 = v_reinterpret_as_u16(pack_lo);
// r1 0 r3 0 r5 0 ...
v_zip(v_reinterpret_as_u8(r0), z, pack_lo, pack_hi);
r1 = v_reinterpret_as_u16(pack_hi);
// r0 0 r2 0 r4 0 ...
r0 = v_reinterpret_as_u16(pack_lo);
// 0 b0 g0 r0 0 b2 g2 r2 ...
v_zip(b0, r0, g0, g1);
g0 = v_reinterpret_as_u16(v_rotate_left<1>(v_reinterpret_as_u8(g0)));
// 0 b8 g8 r8 0 b10 g10 r10 ...
g1 = v_reinterpret_as_u16(v_rotate_left<1>(v_reinterpret_as_u8(g1)));
// b1 g1 r1 0 b3 g3 r3 0 ...
v_zip(b1, r1, r0, r1);
// b9 g9 r9 0 b11 g11 r11 0 ...
// 0 b0 g0 r0 b1 g1 r1 0 ...
v_uint32x4 pack32_lo, pack32_hi;
v_zip(v_reinterpret_as_u32(g0), v_reinterpret_as_u32(r0), pack32_lo, pack32_hi);
b0 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_lo)));
// 0 b4 g4 r4 b5 g5 r5 0 ...
b1 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_hi)));
v_store_low(dst+0, v_reinterpret_as_u8(b0));
v_store_high(dst+6*1, v_reinterpret_as_u8(b0));
v_store_low(dst+6*2, v_reinterpret_as_u8(b1));
v_store_high(dst+6*3, v_reinterpret_as_u8(b1));
// 0 b8 g8 r8 b9 g9 r9 0 ...
v_zip(v_reinterpret_as_u32(g1), v_reinterpret_as_u32(r1), pack32_lo, pack32_hi);
g0 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_lo)));
// 0 b12 g12 r12 b13 g13 r13 0 ...
g1 = v_reinterpret_as_u16(v_rotate_right<1>(v_reinterpret_as_u8(pack32_hi)));
v_store_low(dst+6*4, v_reinterpret_as_u8(g0));
v_store_high(dst+6*5, v_reinterpret_as_u8(g0));
v_store_low(dst+6*6, v_reinterpret_as_u8(g1));
}
return int(bayer - (bayer_end - width));
}
};
#else
typedef SIMDBayerStubInterpolator_<uchar> SIMDBayerInterpolator_8u;
#endif
template<typename T, class SIMDInterpolator>
class Bayer2Gray_Invoker :
public ParallelLoopBody
{
public:
Bayer2Gray_Invoker(const Mat& _srcmat, Mat& _dstmat, int _start_with_green,
const Size& _size, int _bcoeff, int _rcoeff) :
ParallelLoopBody(), srcmat(_srcmat), dstmat(_dstmat), Start_with_green(_start_with_green),
size(_size), Bcoeff(_bcoeff), Rcoeff(_rcoeff)
{
}
virtual void operator ()(const Range& range) const CV_OVERRIDE
{
SIMDInterpolator vecOp;
const unsigned G2Y = 9617;
const int SHIFT = 14;
const T* bayer0 = srcmat.ptr<T>();
int bayer_step = (int)(srcmat.step/sizeof(T));
T* dst0 = (T*)dstmat.data;
int dst_step = (int)(dstmat.step/sizeof(T));
int bcoeff = Bcoeff, rcoeff = Rcoeff;
int start_with_green = Start_with_green;
dst0 += dst_step + 1;
if (range.start % 2)
{
std::swap(bcoeff, rcoeff);
start_with_green = !start_with_green;
}
bayer0 += range.start * bayer_step;
dst0 += range.start * dst_step;
for(int i = range.start ; i < range.end; ++i, bayer0 += bayer_step, dst0 += dst_step )
{
unsigned t0, t1, t2;
const T* bayer = bayer0;
T* dst = dst0;
const T* bayer_end = bayer + size.width;
if( size.width <= 0 )
{
dst[-1] = dst[size.width] = 0;
continue;
}
if( start_with_green )
{
t0 = (bayer[1] + bayer[bayer_step*2+1])*rcoeff;
t1 = (bayer[bayer_step] + bayer[bayer_step+2])*bcoeff;
t2 = bayer[bayer_step+1]*(2*G2Y);
dst[0] = (T)CV_DESCALE(t0 + t1 + t2, SHIFT+1);
bayer++;
dst++;
}
int delta = vecOp.bayer2Gray(bayer, bayer_step, dst, size.width, bcoeff, G2Y, rcoeff);
bayer += delta;
dst += delta;
for( ; bayer <= bayer_end - 2; bayer += 2, dst += 2 )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] + bayer[bayer_step*2+2])*rcoeff;
t1 = (bayer[1] + bayer[bayer_step] + bayer[bayer_step+2] + bayer[bayer_step*2+1])*G2Y;
t2 = bayer[bayer_step+1]*(4*bcoeff);
dst[0] = (T)CV_DESCALE(t0 + t1 + t2, SHIFT+2);
t0 = (bayer[2] + bayer[bayer_step*2+2])*rcoeff;
t1 = (bayer[bayer_step+1] + bayer[bayer_step+3])*bcoeff;
t2 = bayer[bayer_step+2]*(2*G2Y);
dst[1] = (T)CV_DESCALE(t0 + t1 + t2, SHIFT+1);
}
if( bayer < bayer_end )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] + bayer[bayer_step*2+2])*rcoeff;
t1 = (bayer[1] + bayer[bayer_step] + bayer[bayer_step+2] + bayer[bayer_step*2+1])*G2Y;
t2 = bayer[bayer_step+1]*(4*bcoeff);
dst[0] = (T)CV_DESCALE(t0 + t1 + t2, SHIFT+2);
bayer++;
dst++;
}
dst0[-1] = dst0[0];
dst0[size.width] = dst0[size.width-1];
std::swap(bcoeff, rcoeff);
start_with_green = !start_with_green;
}
}
private:
Mat srcmat;
Mat dstmat;
int Start_with_green;
Size size;
int Bcoeff, Rcoeff;
};
template<typename T, typename SIMDInterpolator>
static void Bayer2Gray_( const Mat& srcmat, Mat& dstmat, int code )
{
const int R2Y = 4899;
const int B2Y = 1868;
Size size = srcmat.size();
int bcoeff = B2Y, rcoeff = R2Y;
int start_with_green = code == COLOR_BayerGB2GRAY || code == COLOR_BayerGR2GRAY;
if( code != COLOR_BayerBG2GRAY && code != COLOR_BayerGB2GRAY )
{
std::swap(bcoeff, rcoeff);
}
size.height -= 2;
size.width -= 2;
if (size.height > 0)
{
Range range(0, size.height);
Bayer2Gray_Invoker<T, SIMDInterpolator> invoker(srcmat, dstmat,
start_with_green, size, bcoeff, rcoeff);
parallel_for_(range, invoker, dstmat.total()/static_cast<double>(1<<16));
}
size = dstmat.size();
T* dst0 = dstmat.ptr<T>();
int dst_step = (int)(dstmat.step/sizeof(T));
if( size.height > 2 )
for( int i = 0; i < size.width; i++ )
{
dst0[i] = dst0[i + dst_step];
dst0[i + (size.height-1)*dst_step] = dst0[i + (size.height-2)*dst_step];
}
else
for( int i = 0; i < size.width; i++ )
dst0[i] = dst0[i + (size.height-1)*dst_step] = 0;
}
template <typename T>
struct Alpha
{
static T value() { return std::numeric_limits<T>::max(); }
};
template <>
struct Alpha<float>
{
static float value() { return 1.0f; }
};
template <typename T, typename SIMDInterpolator>
class Bayer2RGB_Invoker :
public ParallelLoopBody
{
public:
Bayer2RGB_Invoker(const Mat& _srcmat, Mat& _dstmat, int _start_with_green, int _blue, const Size& _size) :
ParallelLoopBody(),
srcmat(_srcmat), dstmat(_dstmat), Start_with_green(_start_with_green), Blue(_blue), size(_size)
{
}
virtual void operator() (const Range& range) const CV_OVERRIDE
{
SIMDInterpolator vecOp;
T alpha = Alpha<T>::value();
int dcn = dstmat.channels();
int dcn2 = dcn << 1;
int bayer_step = (int)(srcmat.step/sizeof(T));
const T* bayer0 = srcmat.ptr<T>() + bayer_step * range.start;
int dst_step = (int)(dstmat.step/sizeof(T));
T* dst0 = reinterpret_cast<T*>(dstmat.data) + (range.start + 1) * dst_step + dcn + 1;
int blue = Blue, start_with_green = Start_with_green;
if (range.start % 2)
{
blue = -blue;
start_with_green = !start_with_green;
}
for (int i = range.start; i < range.end; bayer0 += bayer_step, dst0 += dst_step, ++i )
{
int t0, t1;
const T* bayer = bayer0;
T* dst = dst0;
const T* bayer_end = bayer + size.width;
// in case of when size.width <= 2
if( size.width <= 0 )
{
if (dcn == 3)
{
dst[-4] = dst[-3] = dst[-2] = dst[size.width*dcn-1] =
dst[size.width*dcn] = dst[size.width*dcn+1] = 0;
}
else
{
dst[-5] = dst[-4] = dst[-3] = dst[size.width*dcn-1] =
dst[size.width*dcn] = dst[size.width*dcn+1] = 0;
dst[-2] = dst[size.width*dcn+2] = alpha;
}
continue;
}
if( start_with_green )
{
t0 = (bayer[1] + bayer[bayer_step*2+1] + 1) >> 1;
t1 = (bayer[bayer_step] + bayer[bayer_step+2] + 1) >> 1;
dst[-blue] = (T)t0;
dst[0] = bayer[bayer_step+1];
dst[blue] = (T)t1;
if (dcn == 4)
dst[2] = alpha; // alpha channel
bayer++;
dst += dcn;
}
// simd optimization only for dcn == 3
int delta = dcn == 4 ?
vecOp.bayer2RGBA(bayer, bayer_step, dst, size.width, blue, alpha) :
vecOp.bayer2RGB(bayer, bayer_step, dst, size.width, blue);
bayer += delta;
dst += delta*dcn;
if (dcn == 3) // Bayer to BGR
{
if( blue > 0 )
{
for( ; bayer <= bayer_end - 2; bayer += 2, dst += dcn2 )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] +
bayer[bayer_step*2+2] + 2) >> 2;
t1 = (bayer[1] + bayer[bayer_step] +
bayer[bayer_step+2] + bayer[bayer_step*2+1]+2) >> 2;
dst[-1] = (T)t0;
dst[0] = (T)t1;
dst[1] = bayer[bayer_step+1];
t0 = (bayer[2] + bayer[bayer_step*2+2] + 1) >> 1;
t1 = (bayer[bayer_step+1] + bayer[bayer_step+3] + 1) >> 1;
dst[2] = (T)t0;
dst[3] = bayer[bayer_step+2];
dst[4] = (T)t1;
}
}
else
{
for( ; bayer <= bayer_end - 2; bayer += 2, dst += dcn2 )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] +
bayer[bayer_step*2+2] + 2) >> 2;
t1 = (bayer[1] + bayer[bayer_step] +
bayer[bayer_step+2] + bayer[bayer_step*2+1]+2) >> 2;
dst[1] = (T)t0;
dst[0] = (T)t1;
dst[-1] = bayer[bayer_step+1];
t0 = (bayer[2] + bayer[bayer_step*2+2] + 1) >> 1;
t1 = (bayer[bayer_step+1] + bayer[bayer_step+3] + 1) >> 1;
dst[4] = (T)t0;
dst[3] = bayer[bayer_step+2];
dst[2] = (T)t1;
}
}
}
else // Bayer to BGRA
{
// if current row does not contain Blue pixels
if( blue > 0 )
{
for( ; bayer <= bayer_end - 2; bayer += 2, dst += dcn2 )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] +
bayer[bayer_step*2+2] + 2) >> 2;
t1 = (bayer[1] + bayer[bayer_step] +
bayer[bayer_step+2] + bayer[bayer_step*2+1]+2) >> 2;
dst[-1] = (T)t0;
dst[0] = (T)t1;
dst[1] = bayer[bayer_step+1];
dst[2] = alpha; // alpha channel
t0 = (bayer[2] + bayer[bayer_step*2+2] + 1) >> 1;
t1 = (bayer[bayer_step+1] + bayer[bayer_step+3] + 1) >> 1;
dst[3] = (T)t0;
dst[4] = bayer[bayer_step+2];
dst[5] = (T)t1;
dst[6] = alpha; // alpha channel
}
}
else // if current row contains Blue pixels
{
for( ; bayer <= bayer_end - 2; bayer += 2, dst += dcn2 )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] +
bayer[bayer_step*2+2] + 2) >> 2;
t1 = (bayer[1] + bayer[bayer_step] +
bayer[bayer_step+2] + bayer[bayer_step*2+1]+2) >> 2;
dst[-1] = bayer[bayer_step+1];
dst[0] = (T)t1;
dst[1] = (T)t0;
dst[2] = alpha; // alpha channel
t0 = (bayer[2] + bayer[bayer_step*2+2] + 1) >> 1;
t1 = (bayer[bayer_step+1] + bayer[bayer_step+3] + 1) >> 1;
dst[3] = (T)t1;
dst[4] = bayer[bayer_step+2];
dst[5] = (T)t0;
dst[6] = alpha; // alpha channel
}
}
}
// if skip one pixel at the end of row
if( bayer < bayer_end )
{
t0 = (bayer[0] + bayer[2] + bayer[bayer_step*2] +
bayer[bayer_step*2+2] + 2) >> 2;
t1 = (bayer[1] + bayer[bayer_step] +
bayer[bayer_step+2] + bayer[bayer_step*2+1]+2) >> 2;
dst[-blue] = (T)t0;
dst[0] = (T)t1;
dst[blue] = bayer[bayer_step+1];
if (dcn == 4)
dst[2] = alpha; // alpha channel
bayer++;
dst += dcn;
}
// fill the last and the first pixels of row accordingly
if (dcn == 3)
{
dst0[-4] = dst0[-1];
dst0[-3] = dst0[0];
dst0[-2] = dst0[1];
dst0[size.width*dcn-1] = dst0[size.width*dcn-4];
dst0[size.width*dcn] = dst0[size.width*dcn-3];
dst0[size.width*dcn+1] = dst0[size.width*dcn-2];
}
else
{
dst0[-5] = dst0[-1];
dst0[-4] = dst0[0];
dst0[-3] = dst0[1];
dst0[-2] = dst0[2]; // alpha channel
dst0[size.width*dcn-1] = dst0[size.width*dcn-5];
dst0[size.width*dcn] = dst0[size.width*dcn-4];
dst0[size.width*dcn+1] = dst0[size.width*dcn-3];
dst0[size.width*dcn+2] = dst0[size.width*dcn-2]; // alpha channel
}
blue = -blue;
start_with_green = !start_with_green;
}
}
private:
Mat srcmat;
Mat dstmat;
int Start_with_green, Blue;
Size size;
};
template<typename T, class SIMDInterpolator>
static void Bayer2RGB_( const Mat& srcmat, Mat& dstmat, int code )
{
int dst_step = (int)(dstmat.step/sizeof(T));
Size size = srcmat.size();
int blue = (code == COLOR_BayerBG2BGR || code == COLOR_BayerGB2BGR ||
code == COLOR_BayerBG2BGRA || code == COLOR_BayerGB2BGRA ) ? -1 : 1;
int start_with_green = (code == COLOR_BayerGB2BGR || code == COLOR_BayerGR2BGR ||
code == COLOR_BayerGB2BGRA || code == COLOR_BayerGR2BGRA);
int dcn = dstmat.channels();
size.height -= 2;
size.width -= 2;
if (size.height > 0)
{
Range range(0, size.height);
Bayer2RGB_Invoker<T, SIMDInterpolator> invoker(srcmat, dstmat, start_with_green, blue, size);
parallel_for_(range, invoker, dstmat.total()/static_cast<double>(1<<16));
}
// filling the first and the last rows
size = dstmat.size();
T* dst0 = dstmat.ptr<T>();
if( size.height > 2 )
for( int i = 0; i < size.width*dcn; i++ )
{
dst0[i] = dst0[i + dst_step];
dst0[i + (size.height-1)*dst_step] = dst0[i + (size.height-2)*dst_step];
}
else
for( int i = 0; i < size.width*dcn; i++ )
dst0[i] = dst0[i + (size.height-1)*dst_step] = 0;
}
/////////////////// Demosaicing using Variable Number of Gradients ///////////////////////
static void Bayer2RGB_VNG_8u( const Mat& srcmat, Mat& dstmat, int code )
{
const uchar* bayer = srcmat.ptr();