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Added clamp() for THRESH_TRUNC mode

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This commit is contained in:
Alexander Karsakov 2014-05-13 15:21:47 +04:00
parent eba1be711c
commit 4612b4b827
2 changed files with 11 additions and 7 deletions
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12
modules/imgproc/src/opencl/threshold.cl
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@ -53,7 +53,7 @@
__kernel void threshold(__global const uchar * srcptr, int src_step, int src_offset,
__global uchar * dstptr, int dst_step, int dst_offset, int rows, int cols,
T1 thresh, T1 max_val)
T1 thresh, T1 max_val, T1 min_val)
{
int gx = get_global_id(0);
int gy = get_global_id(1);
@ -67,15 +67,15 @@ __kernel void threshold(__global const uchar * srcptr, int src_step, int src_off
__global T * dst = (__global T *)(dstptr + dst_index);
#ifdef THRESH_BINARY
dst[0] = sdata > (T)(thresh) ? (T)(max_val) : (T)(0);
dst[0] = sdata > (thresh) ? (T)(max_val) : (T)(0);
#elif defined THRESH_BINARY_INV
dst[0] = sdata > (T)(thresh) ? (T)(0) : (T)(max_val);
dst[0] = sdata > (thresh) ? (T)(0) : (T)(max_val);
#elif defined THRESH_TRUNC
dst[0] = sdata > (T)(thresh) ? (T)(thresh) : sdata;
dst[0] = clamp(sdata, (T)min_val, (T)(thresh));
#elif defined THRESH_TOZERO
dst[0] = sdata > (T)(thresh) ? sdata : (T)(0);
dst[0] = sdata > (thresh) ? sdata : (T)(0);
#elif defined THRESH_TOZERO_INV
dst[0] = sdata > (T)(thresh) ? (T)(0) : sdata;
dst[0] = sdata > (thresh) ? (T)(0) : sdata;
#endif
}
}

6
modules/imgproc/src/thresh.cpp
View File

@ -847,9 +847,13 @@ static bool ocl_threshold( InputArray _src, OutputArray _dst, double & thresh, d
if (depth <= CV_32S)
thresh = cvFloor(thresh);
const double min_vals[] = { 0, CHAR_MIN, 0, SHRT_MIN, INT_MIN, -FLT_MAX, -DBL_MAX, 0 };
double min_val = min_vals[depth];
k.args(ocl::KernelArg::ReadOnlyNoSize(src), ocl::KernelArg::WriteOnly(dst, cn, kercn),
ocl::KernelArg::Constant(Mat(1, 1, depth, Scalar::all(thresh))),
ocl::KernelArg::Constant(Mat(1, 1, depth, Scalar::all(maxval))));
ocl::KernelArg::Constant(Mat(1, 1, depth, Scalar::all(maxval))),
ocl::KernelArg::Constant(Mat(1, 1, depth, Scalar::all(min_val))));
size_t globalsize[2] = { dst.cols * cn / kercn, dst.rows };
return k.run(2, globalsize, NULL, false);