hough Namespace Reference

Perform a "2 point" Hough transform on a collection of hits. More...

Classes
class	Hough2P
	Hough transform based on 2-point combinations. More...
class	HoughT
class	HoughValidate
	Validate Hough transform algorithms. More...
class	HValidateNt
	Ntuple produced by the HoughValidate module. More...
class	IslandsTH2
class	LiteTH2
class	MultiHough2P
	Hough transform based on 2-point combinations. More...
class	MultiHoughT

Functions
static Double_t	Gaus (const Double_t x, const Double_t sigma)

Detailed Description

Perform a "2 point" Hough transform on a collection of hits.

Ntuple produced by the HoughValidate module.

Validate anything that creates HoughResults.

Tool for finding and labeling "islands" around peaks in a Hough map.

TODO.

Run and test Hough transform algorithms.

Authors

messi.nosp@m.er@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u, mibai.nosp@m.rd@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u

Date

Authors

messi.nosp@m.er@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u, mibai.nosp@m.rd@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u transform header

Author

mbair.nosp@m.d42@.nosp@m.fnal..nosp@m.gov

Date

Authors

messi.nosp@m.er@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u, mibai.nosp@m.rd@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u

Date

Nov. 2011

Author

mibai.nosp@m.rd@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u, gsdav.nosp@m.ies@.nosp@m.iu.ed.nosp@m.u

Date

Author

mibai.nosp@m.rd@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u

mibai.nosp@m.rd@i.nosp@m.ndian.nosp@m.a.ed.nosp@m.u

Date

Function Documentation

static Double_t hough::Gaus ( const Double_t  x, const Double_t  sigma  )

static

Definition at line 215 of file MultiHough2P.cxx.

References stan::math::exp(), and sigma().

Referenced by hough::MultiHough2P::Map(), and hough::MultiHough2P::SmoothMap().

  {
     const Double_t arg = x/sigma;
     // for |arg| > 39  result is zero in double precision
     if (arg < -39.0 || arg > 39.0) return 0.0;
     const Double_t res = exp(-0.5*arg*arg);
     return res/(2.50662827463100024*sigma); //sqrt(2*Pi)=2.50662827463100024
  }