lsst Namespace Reference

Estimate image backgrounds. More...

Namespaces
	afw
	ap
	base
	coadd
	ctrl
	daf
	datarel
	gdb
	geom
	ip
	meas
	pex
	pipe
	sconsUtils
	skymap
	skypix
	utils

Functions
float	approxExp (float x)

Variables
tuple	__path__ = pkgutil.extend_path(__path__, __name__)
lsst::utils::PowFast const &	powFast = lsst::utils::getPowFast<11>()

Detailed Description

Estimate image backgrounds.

Remove all non-astronomical counts from the Chunk Exposure's pixels.

< multiple inclusion guard macro

Compute a set of apertures using a naive algorithm /.

A number of non-trivial splines.

Interpolate values for a set of x,y vector<>s.

Approximate values for a set of x,y vector<>s.

Numeric constants used by the Integrate.h integrator routines.

Following the bit-twiddling idea in:

'A Fast, Compact Approximation of the Exponential Function' Technical Report IDSIA-07-98 Nicol N. Schraudolph; IDSIA, 1998-06-24.

[Rewritten for floats by HXA7241, 2007.]

and the adjustable-lookup idea in:

'Revisiting a basic function on current CPUs: A fast logarithm implementation with adjustable accuracy' Technical Report ICSI TR-07-002; Oriol Vinyals, Gerald Friedland, Nikki Mirghafori; ICSI, 2007-06-21.

[Improved (doubled accuracy) and rewritten by HXA7241, 2007.]

Todo:

These should go into afw — actually, there're already there, but in an anon namespace

A base class for image defects

Author

Steve Bickerton

Note

Gauss-Kronrod-Patterson quadrature coefficients for use in quadpack routine qng. These coefficients were calculated with 101 decimal digit arithmetic by L. W. Fullerton, Bell Labs, Nov 1981.

These should be merged into lsst::afw::math::Interpolate, but its current implementation (and to some degree interface) uses gsl explicitly

Specialisation for Masks; just calculate the "Sum" as the bitwise OR of all pixels

Function Documentation

float lsst::approxExp ( float  x )

inline

Definition at line 57 of file SdssShape.cc.

{
#if USE_APPROXIMATE_EXP
    return powFast.exp(x);
#else
    return std::exp(x);
#endif
}

Variable Documentation

tuple lsst.__path__ = pkgutil.extend_path(__path__, __name__)

Definition at line 2 of file __init__.py.

lsst::utils::PowFast const & lsst::powFast = lsst::utils::getPowFast<11>()

Definition at line 53 of file SdssShape.cc.