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removed division

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marina.kolpakova
2012-07-24 13:35:04 +04:00
parent 8fb1f4093b
commit 6c3eeb7d7c
2 changed files with 34 additions and 44 deletions
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60
modules/gpu/src/cuda/lbp.cu
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@@ -240,59 +240,47 @@ namespace cv { namespace gpu { namespace device
// stepShift, scale, width_k, sum_prev => y = sum_prev + tid_k / width_k, x = tid_k - tid_k / width_k
__global__ void lbp_cascade(const Cascade cascade, int frameW, int frameH, int windowW, int windowH, float scale, const float factor,
const int workAmount, int* integral, const int pitch, DevMem2D_<int4> objects, unsigned int* classified)
const int total, int* integral, const int pitch, DevMem2D_<int4> objects, unsigned int* classified)
{
int ftid = blockIdx.x * blockDim.x + threadIdx.x;
if (ftid >= workAmount ) return;
if (ftid >= total) return;
int sum = 0;
// float scale = 1.0f;
float stepShift = (scale <= 2.f) ? 2.0 : 1.0;
int w = ceilf( ( __float2int_rn(frameW / scale) - windowW + 1) / stepShift);
int h = ceilf( ( __float2int_rn(frameH / scale) - windowH + 1) / stepShift);
int step = (scale <= 2.f);
// if (!ftid)
// printf("!!!!: %d %d", w, h);
int windowsForLine = (__float2int_rn( __fdividef(frameW, scale)) - windowW) >> step;
int stotal = windowsForLine * ( (__float2int_rn( __fdividef(frameH, scale)) - windowH) >> step);
int wshift = 0;
int framTid = ftid;
int i = 0;
int scaleTid = ftid;
while (1)
while (scaleTid >= stotal)
{
if (framTid < (w - 1) * (h - 1)) break;
i++;
sum += __float2int_rn(frameW / scale) + 1;
framTid -= w * h;
scaleTid -= stotal;
wshift += __float2int_rn(__fdividef(frameW, scale)) + 1;
scale *= factor;
stepShift = (scale <= 2.f) ? 2.0 : 1.0;
int w = ceilf( ( __float2int_rn(frameW / scale) - windowW + 1) / stepShift);
int h = ceilf( ( __float2int_rn(frameH / scale) - windowH + 1) / stepShift);
step = (scale <= 2.f);
windowsForLine = ( ((__float2int_rn(__fdividef(frameW, scale)) - windowW) >> step));
stotal = windowsForLine * ( (__float2int_rn(__fdividef(frameH, scale)) - windowH) >> step);
}
int y = (framTid / w);
int x = (framTid - y * w) * stepShift;
y *= stepShift;
x += sum;
int y = __fdividef(scaleTid, windowsForLine);
int x = scaleTid - y * windowsForLine;
// if (i == 2)
// printf("!!!!!!!!!!!!!! %f %d %d %d\n", windowW * scale, sum, y, x);
x <<= step;
y <<= step;
if (cascade(y, x, integral, pitch))
if (cascade(y, x + wshift, integral, pitch))
{
if(x >= __float2int_rn(__fdividef(frameW, scale)) - windowW) return;
int4 rect;
rect.x = roundf( (x - sum) * scale);
rect.y = roundf(y * scale);
rect.z = roundf(windowW * scale);
rect.w = roundf(windowH * scale);
if (rect.x > frameW || rect.y > frameH) return;
// printf("OUTLAUER %d %d %d %d %d %d %d %d %d %f %f\n", x, y, ftid, framTid, rect.x, rect.y, sum, w, h, stepShift, scale);
// printf("passed: %d %d ---- %d %d %d %d %d\n", y, x, rect.x, rect.y, rect.z, rect.w, sum);
rect.x = __float2int_rn(x * scale);
rect.y = __float2int_rn(y * scale);
rect.z = __float2int_rn(windowW * scale);
rect.w = __float2int_rn(windowH * scale);
int res = Emulation::smem::atomicInc(classified, (unsigned int)objects.cols);
objects(0, res) = rect;
}
}