generic-library/opencv
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Fixed conversions from YV12 and IYUV on non-continuous input. Added accuracy and performance tests.

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This commit is contained in:
Andrey Kamaev
2012-03-31 22:30:18 +00:00
parent a22641aa9c
commit 470f6fafeb
3 changed files with 744 additions and 254 deletions
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92
modules/imgproc/src/color.cpp
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@@ -2829,22 +2829,18 @@ struct YUV420p2RGB888Invoker
Mat* dst;
const uchar* my1, *mu, *mv;
int width, stride;
int ustepIdx, vstepIdx;
YUV420p2RGB888Invoker(Mat* _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v)
: dst(_dst), my1(_y1), mu(_u), mv(_v), width(_dst->cols), stride(_stride) {}
YUV420p2RGB888Invoker(Mat* _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v, int _ustepIdx, int _vstepIdx)
: dst(_dst), my1(_y1), mu(_u), mv(_v), width(_dst->cols), stride(_stride), ustepIdx(_ustepIdx), vstepIdx(_vstepIdx) {}
void operator()(const BlockedRange& range) const
{
const int rangeBegin = range.begin() * 2;
const int rangeEnd = range.end() * 2;
//R = 1.164(Y - 16) + 1.596(V - 128)
//G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128)
//B = 1.164(Y - 16) + 2.018(U - 128)
//R = (1220542(Y - 16) + 1673527(V - 128) + (1 << 19)) >> 20
//G = (1220542(Y - 16) - 852492(V - 128) - 409993(U - 128) + (1 << 19)) >> 20
//B = (1220542(Y - 16) + 2116026(U - 128) + (1 << 19)) >> 20
size_t uvsteps[2] = {width/2, stride - width/2};
int usIdx = ustepIdx, vsIdx = vstepIdx;
const int cY = 1220542;
const int cUB = 2116026;
@@ -2854,10 +2850,16 @@ struct YUV420p2RGB888Invoker
const int YUV420_SHIFT = 20;
const uchar* y1 = my1 + rangeBegin * stride;
const uchar* u1 = mu + (range.begin() / 2) * stride + (range.begin() % 2) * width/2;
const uchar* v1 = mv + (range.begin() / 2) * stride + (range.begin() % 2) * width/2;
const uchar* u1 = mu + (range.begin() / 2) * stride;
const uchar* v1 = mv + (range.begin() / 2) * stride;
if(range.begin() % 2 == 1)
{
u1 += uvsteps[(usIdx++) & 1];
v1 += uvsteps[(vsIdx++) & 1];
}
for (int j = rangeBegin; j < rangeEnd; j += 2, y1 += stride * 2, u1 += width / 2, v1 += width / 2)
for (int j = rangeBegin; j < rangeEnd; j += 2, y1 += stride * 2, u1 += uvsteps[(usIdx++) & 1], v1 += uvsteps[(vsIdx++) & 1])
{
uchar* row1 = dst->ptr<uchar>(j);
uchar* row2 = dst->ptr<uchar>(j + 1);
@@ -2892,12 +2894,6 @@ struct YUV420p2RGB888Invoker
row2[4] = saturate_cast<uchar>((y11 + guv) >> YUV420_SHIFT);
row2[3+bIdx] = saturate_cast<uchar>((y11 + buv) >> YUV420_SHIFT);
}
if(j % 4 == 2)
{
u1 += stride - width;
v1 += stride - width;
}
}
}
};
@@ -2908,35 +2904,37 @@ struct YUV420p2RGBA8888Invoker
Mat* dst;
const uchar* my1, *mu, *mv;
int width, stride;
int ustepIdx, vstepIdx;
YUV420p2RGBA8888Invoker(Mat* _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v)
: dst(_dst), my1(_y1), mu(_u), mv(_v), width(_dst->cols), stride(_stride) {}
YUV420p2RGBA8888Invoker(Mat* _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v, int _ustepIdx, int _vstepIdx)
: dst(_dst), my1(_y1), mu(_u), mv(_v), width(_dst->cols), stride(_stride), ustepIdx(_ustepIdx), vstepIdx(_vstepIdx) {}
void operator()(const BlockedRange& range) const
{
int rangeBegin = range.begin() * 2;
int rangeEnd = range.end() * 2;
//R = 1.164(Y - 16) + 1.596(V - 128)
//G = 1.164(Y - 16) - 0.813(V - 128) - 0.391(U - 128)
//B = 1.164(Y - 16) + 2.018(U - 128)
//R = (1220542(Y - 16) + 1673527(V - 128) + (1 << 19)) >> 20
//G = (1220542(Y - 16) - 852492(V - 128) - 409993(U - 128) + (1 << 19)) >> 20
//B = (1220542(Y - 16) + 2116026(U - 128) + (1 << 19)) >> 20
const int cY = 1220542;
const int cUB = 2116026;
const int cUG = -409993;
const int cVG = -852492;
const int cVR = 1673527;
const int YUV420_SHIFT = 20;
size_t uvsteps[2] = {width/2, stride - width/2};
int usIdx = ustepIdx, vsIdx = vstepIdx;
const uchar* y1 = my1 + rangeBegin * stride;
const uchar* u1 = mu + (range.begin() / 2) * stride + (range.begin() % 2) * width/2;
const uchar* v1 = mv + (range.begin() / 2) * stride + (range.begin() % 2) * width/2;
const uchar* u1 = mu + (range.begin() / 2) * stride;
const uchar* v1 = mv + (range.begin() / 2) * stride;
if(range.begin() % 2 == 1)
{
u1 += uvsteps[(usIdx++) & 1];
v1 += uvsteps[(vsIdx++) & 1];
}
for (int j = rangeBegin; j < rangeEnd; j += 2, y1 += stride * 2, u1 += width / 2, v1 += width / 2)
for (int j = rangeBegin; j < rangeEnd; j += 2, y1 += stride * 2, u1 += uvsteps[(usIdx++) & 1], v1 += uvsteps[(vsIdx++) & 1])
{
uchar* row1 = dst->ptr<uchar>(j);
uchar* row2 = dst->ptr<uchar>(j + 1);
@@ -2975,12 +2973,6 @@ struct YUV420p2RGBA8888Invoker
row2[4+bIdx] = saturate_cast<uchar>((y11 + buv) >> YUV420_SHIFT);
row2[7] = uchar(0xff);
}
if(j % 4 == 2)
{
u1 += stride - width;
v1 += stride - width;
}
}
}
};
@@ -3012,9 +3004,9 @@ inline void cvtYUV420sp2RGBA(Mat& _dst, int _stride, const uchar* _y1, const uch
}
template<int bIdx>
inline void cvtYUV420p2RGB(Mat& _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v)
inline void cvtYUV420p2RGB(Mat& _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v, int ustepIdx, int vstepIdx)
{
YUV420p2RGB888Invoker<bIdx> converter(&_dst, _stride, _y1, _u, _v);
YUV420p2RGB888Invoker<bIdx> converter(&_dst, _stride, _y1, _u, _v, ustepIdx, vstepIdx);
#ifdef HAVE_TBB
if (_dst.total() >= MIN_SIZE_FOR_PARALLEL_YUV420_CONVERSION)
parallel_for(BlockedRange(0, _dst.rows/2), converter);
@@ -3024,9 +3016,9 @@ inline void cvtYUV420p2RGB(Mat& _dst, int _stride, const uchar* _y1, const uchar
}
template<int bIdx>
inline void cvtYUV420p2RGBA(Mat& _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v)
inline void cvtYUV420p2RGBA(Mat& _dst, int _stride, const uchar* _y1, const uchar* _u, const uchar* _v, int ustepIdx, int vstepIdx)
{
YUV420p2RGBA8888Invoker<bIdx> converter(&_dst, _stride, _y1, _u, _v);
YUV420p2RGBA8888Invoker<bIdx> converter(&_dst, _stride, _y1, _u, _v, ustepIdx, vstepIdx);
#ifdef HAVE_TBB
if (_dst.total() >= MIN_SIZE_FOR_PARALLEL_YUV420_CONVERSION)
parallel_for(BlockedRange(0, _dst.rows/2), converter);
@@ -3461,15 +3453,19 @@ void cv::cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
int srcstep = (int)src.step;
const uchar* y = src.ptr();
const uchar* u = y + srcstep * dstSz.height;
const uchar* v = u + (srcstep * dstSz.height / 4);
if(uidx == 1) std::swap(u ,v);
const uchar* v = y + srcstep * (dstSz.height + dstSz.height/4) + (dstSz.width/2) * ((dstSz.height % 4)/2);
int ustepIdx = 0;
int vstepIdx = dstSz.height % 4 == 2 ? 1 : 0;
if(uidx == 1) { std::swap(u ,v), std::swap(ustepIdx, vstepIdx); };
switch(dcn*10 + bidx)
{
case 30: cvtYUV420p2RGB<0>(dst, srcstep, y, u, v); break;
case 32: cvtYUV420p2RGB<2>(dst, srcstep, y, u, v); break;
case 40: cvtYUV420p2RGBA<0>(dst, srcstep, y, u, v); break;
case 42: cvtYUV420p2RGBA<2>(dst, srcstep, y, u, v); break;
case 30: cvtYUV420p2RGB<0>(dst, srcstep, y, u, v, ustepIdx, vstepIdx); break;
case 32: cvtYUV420p2RGB<2>(dst, srcstep, y, u, v, ustepIdx, vstepIdx); break;
case 40: cvtYUV420p2RGBA<0>(dst, srcstep, y, u, v, ustepIdx, vstepIdx); break;
case 42: cvtYUV420p2RGBA<2>(dst, srcstep, y, u, v, ustepIdx, vstepIdx); break;
default: CV_Error( CV_StsBadFlag, "Unknown/unsupported color conversion code" ); break;
};
}