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Luiza
v03-01
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Class for calculating basic properties of pixel cluster. More...
#include <GloriaClusterStatistics.h>
Public Member Functions | |
| GloriaClusterStatistics () | |
| Dummy constructor - creates empty cluster. | |
| ~GloriaClusterStatistics () | |
| Destructor. | |
| void | Clear () |
| Clear cluster statistics. | |
| void | AddPixel (int ix, int iy, double signal) |
| Add pixel to the cluster. More... | |
| int | GetNpixel () |
| Get cluster multiplicity (number of pixels) | |
| double | GetSignal () |
| Get cluster signal (sum of pixel signals) | |
| double | GetXpos () |
| Get cluster position (CoG) in X. | |
| double | GetYpos () |
| Get cluster position (CoG) in Y. | |
| double | GetXspread () |
| Get cluster spread (RMS) in X. | |
| double | GetYspread () |
| Get cluster spread (RMS) in Y. | |
| double | GetXYcorr () |
| Get X-Y correlation for the cluster. | |
| double | GetFWHM () |
| Get effective cluster width. | |
| double | GetElongation () |
| Get cluster elongation. | |
| double | GetOrientation () |
| Get cluster orientation (direction of primary axis) | |
| double | GetLength () |
| Get cluster length (length of primary axis) | |
| double | GetWidth () |
| Get cluster width (length of secondary axis) | |
Class for calculating basic properties of pixel cluster.
This class can be use to calculate properties of the pixel cluster as signal (sum of pixel values), position (from Center of Gravity - CoG), spread in X, Y and X-Y correlation of charge distribution, and finally effective width (FWHM), elongation (elliptisity) as well as orientation of the primary axis.
| void gloria::GloriaClusterStatistics::AddPixel | ( | int | ix, |
| int | iy, | ||
| double | signal | ||
| ) |
Add pixel to the cluster.
Pixels are not stored inside ClusterStatitics. Coordinates of the first pixel added (most probably the seed pixel) are remembered as the offset for shape calculation (for numerical stability). Otherwise, coordinates weighted by signal are added to different counters: weighted sums of x, y, x^2, y^2 and xy. These sums can be then used to calculate statistical parameters of the charge distribution.
Referenced by luiza::CalculateGausPSF::processData(), luiza::ApplyGausKernel::processData(), luiza::PixelClusterFinder::processData(), and luiza::WeightedAperturePhotometry::processData().
1.8.9.1
