ImageSourceFinder.h
Classes
- ImageSourceFinder -- Provides functionality to find sources in an image (full description)
Interface
- Public Members
- ImageSourceFinder (const ImageInterface<T>&)
- ImageSourceFinder (const ImageSourceFinder<T> &other)
- ~ImageSourceFinder()
- ImageSourceFinder<T> &operator=(const ImageSourceFinder<T> &other)
- ComponentList findSources (LogIO& os, Int nMax, Double cutoff=0.1, Bool absFind=True, Bool doPoint=True, Int width=4)
- SkyComponent findSourceInSky (LogIO& os, Vector<Double>& absPixel, Double cutoff=0.1, Bool absFind=True, Bool doPoint=True, Int width=4)
- Bool setNewImage (const ImageInterface<T>& image)
- Private Members
- ComponentList findSources (LogIO& os, const ImageInterface<T>& image, Int nMax, Double cutoff, Bool absFind, Bool doPoint, Int width)
Review Status
- Date Reviewed:
- yyyy/mm/dd
Prerequisite
Etymology
It finds sources.
Synopsis
This class provides methods to find sources in an image.
The finding procedes in two stages. First, strong point sources
are found via an efficient algorithm producing POINT components.
If you wish, you can further request a Gaussian fit to these
found point sources and then return the parameters of the
fit (as a GAUSIAN component).
Example
Motivation
This complements source fitting by providing an initial estimate
To Do
Member Description
Constructor
ImageSourceFinder (const ImageSourceFinder<T> &other)
Copy constructor
Destructor
ImageSourceFinder<T> &operator=(const ImageSourceFinder<T> &other)
Assignment operator
ComponentList findSources (LogIO& os, Int nMax, Double cutoff=0.1, Bool absFind=True, Bool doPoint=True, Int width=4)
Find strong sources. nMax specifies the maximum number of sources to find.
cutoff is the fractional cutoff (of peak) and soiurces below this limit
will not be found. If absFind is True, only positive sources are found, else
positive and negative are found. If doPoint=True, the returned components
are of type POINT. If doPoint=False, the position and shape information is
returned via a Gaussian fit (and components will be of
type GAUSSIAN) to the point sources initially found. The parameter width
specifies the half-width of a square grid of pixels centered on the initial
point source location to be used in the fit. If you set doPoint=False and width=0,
a default width of 3 and position angle 0 is returned in the GAUSSIAN component.
Because the flux of the component is integrated, this rough shape influences the
flux values as well.
SkyComponent findSourceInSky (LogIO& os, Vector<Double>& absPixel, Double cutoff=0.1, Bool absFind=True, Bool doPoint=True, Int width=4)
Find one source in sky plane. Exception if no sky
Bool setNewImage (const ImageInterface<T>& image)
Set a new image
ComponentList findSources (LogIO& os, const ImageInterface<T>& image, Int nMax, Double cutoff, Bool absFind, Bool doPoint, Int width)
Find strong (point) sources