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Explicitly use double precision sin & cos in hough implementation

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On some platforms sin and cos are calculated in single precision resulting in
diversity of results.
This commit is contained in:
Andrey Kamaev 2012-12-25 18:05:05 +04:00
parent 6bc795308e
commit 16687a2655
1 changed files with 2 additions and 2 deletions
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4
modules/imgproc/src/hough.cpp
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@ -118,8 +118,8 @@ icvHoughLinesStandard( const CvMat* img, float rho, float theta,
float ang = 0; float ang = 0;
for(int n = 0; n < numangle; ang += theta, n++ ) for(int n = 0; n < numangle; ang += theta, n++ )
{ {
tabSin[n] = (float)(sin(ang) * irho); tabSin[n] = (float)(sin((double)ang) * irho);
tabCos[n] = (float)(cos(ang) * irho); tabCos[n] = (float)(cos((double)ang) * irho);
} }
// stage 1. fill accumulator // stage 1. fill accumulator