2 ***********************************************************
3 $SNARK_Header: S N A R K 1 4 - A PICTURE RECONSTRUCTION PROGRAM $
4 $HeadURL: svn://dig.cs.gc.cuny.edu/snark/trunk/src/snark/noise.h $
5 $LastChangedRevision: 80 $
6 $Date: 2014-07-01 21:01:54 -0400 (Tue, 01 Jul 2014) $
8 ***********************************************************
16 // bug221 - moved noise code to this class - swr - 03/03/07
18 extern class Noise_class
21 INTEGER quanin;REAL quanmn;REAL quancm;BOOLEAN sctnfl;REAL sctnpk;REAL sctnwd;BOOLEAN ultnfl;REAL ultnmn;REAL ultnsd;BOOLEAN addnfl;REAL addnmn;REAL addnsd;
22 void setAdditiveNoise(REAL mean, REAL std);REAL additiveNoise(REAL value);
23 void setMultiplicativeNoise(REAL mean, REAL std);REAL multiplicativeNoise(REAL value);
24 void setScatter(REAL peak, REAL width);
25 void scatterNoise(REAL* projection);
26 void setQuantumNoise(INTEGER type, REAL mean, REAL calibration);
27 void setQuantumNoise();REAL applyQuantumNoise(INTEGER np, INTEGER nr, REAL sum);REAL raysum(REAL raysum);REAL computeAttenuation( INTEGER np, INTEGER nr, REAL ind);
28 void resetNoise(); // jklukowska, bug 263, in case the noise was set
29 // previously, we need to reset it to initial values
33 REAL* sctcnt;REAL* sctwts;REAL* calray;INTEGER nsctr;REAL back;REAL aback;REAL cback;REAL c;INTEGER oldnp;
39 CONSTANT_PROJECTION = 1,