lsst::afw::image::pixel::variance_divides< T1 > 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 T1>
struct lsst::afw::image::pixel::variance_divides< T1 >

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 352 of file Pixel.h.

Member Function Documentation

operator()() [1/2]

template<typename T1>

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

inline

Definition at line 360 of file Pixel.h.

{ return vx / (y * y); }

operator()() [2/2]

template<typename T1>

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

inline

Definition at line 353 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;
    }

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

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-11.0.0/Linux/afw/g81db2e9a8d+98e2ab9f28/include/lsst/afw/image/Pixel.h