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Added ROUNDING_EPS for identical rounding after dividing on different platforms

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This commit is contained in:
Alexander Karsakov 2014-08-12 12:06:37 +04:00
parent 10b3d00fd1
commit 5898dcae4a
1 changed files with 5 additions and 2 deletions
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7
modules/imgproc/src/opencl/calc_back_project.cl
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@ -39,6 +39,9 @@
#define OUT_OF_RANGE -1 #define OUT_OF_RANGE -1
// for identical rounding after dividing on different platforms
#define ROUNDING_EPS 0.000001f
#if histdims == 1 #if histdims == 1
__kernel void calcLUT(__global const uchar * histptr, int hist_step, int hist_offset, int hist_bins, __kernel void calcLUT(__global const uchar * histptr, int hist_step, int hist_offset, int hist_bins,
@ -53,7 +56,7 @@ __kernel void calcLUT(__global const uchar * histptr, int hist_step, int hist_of
{ {
float lb = ranges[0], ub = ranges[1], gap = (ub - lb) / hist_bins; float lb = ranges[0], ub = ranges[1], gap = (ub - lb) / hist_bins;
value -= lb; value -= lb;
int bin = convert_int_sat_rtn(value / gap); int bin = convert_int_sat_rtn(value / gap + ROUNDING_EPS);
if (bin >= hist_bins) if (bin >= hist_bins)
lut[x] = OUT_OF_RANGE; lut[x] = OUT_OF_RANGE;
@ -101,7 +104,7 @@ __kernel void calcLUT(int hist_bins, __global int * lut, int lut_offset,
{ {
float lb = ranges[0], ub = ranges[1], gap = (ub - lb) / hist_bins; float lb = ranges[0], ub = ranges[1], gap = (ub - lb) / hist_bins;
value -= lb; value -= lb;
int bin = convert_int_sat_rtn(value / gap); int bin = convert_int_sat_rtn(value / gap + ROUNDING_EPS);
lut[x] = bin >= hist_bins ? OUT_OF_RANGE : bin; lut[x] = bin >= hist_bins ? OUT_OF_RANGE : bin;
} }