lsst::afw::image::pixel::variance_divides< typename > Struct Template Reference

Calculate the variance when we divide two Pixels. More...

#include <Pixel.h>

Public Member Functions
T1	operator() (T1 const &x, T1 const &y, T1 const &vx, T1 const &vy) const
T1	operator() (T1 const &, T1 const &y, T1 const &vx) const

Detailed Description

template<typename>
struct lsst::afw::image::pixel::variance_divides< typename >

Calculate the variance when we divide two Pixels.

Note

We provide a single-operand version for when the right-hand-side of an expression is a scalar, not a masked pixel,

Definition at line 37 of file Pixel.h.

Member Function Documentation

template<typename >

T1 lsst::afw::image::pixel::variance_divides< typename >::operator() ( T1 const &  x, T1 const &  y, T1 const &  vx, T1 const &  vy  ) const

inline

Definition at line 346 of file Pixel.h.

                                                                              {
        T1 const x2 = x*x;
        T1 const y2 = y*y;
        T1 const iy2 = 1.0/y2;
        return x2*vy*iy2*iy2 + vx*iy2;
    }

template<typename >

T1 lsst::afw::image::pixel::variance_divides< typename >::operator() ( T1 const &  , T1 const &  y, T1 const &  vx  ) const

inline

Definition at line 353 of file Pixel.h.

                                                              {
        return vx/(y*y);
    }

---

The documentation for this struct was generated from the following file:

• /home/lsstsw/stack/Linux64/afw/11.0-2-g04d2804/include/lsst/afw/image/Pixel.h