EMAN::Util::sincBlackman Class Reference
#include <util.h>
Collaboration diagram for EMAN::Util::sincBlackman:
Public Member Functions | |
| sincBlackman (int M_, float fc_, int ntable_=1999) | |
| virtual | ~sincBlackman () |
| float | sBwin_tab (float x) const |
| int | get_sB_size () const |
| Return the size of the kernel. | |
Protected Member Functions | |
| virtual void | build_sBtable () |
Protected Attributes | |
| int | M |
| float | fc |
| kernel size | |
| int | ntable |
| cut-off frequency | |
| vector< float > | sBtable |
| float | fltb |
| Tabulate kernel for speed. | |
Detailed Description
Definition at line 224 of file util.h.
Constructor & Destructor Documentation
| Util::sincBlackman::sincBlackman | ( | int | M_, | |
| float | fc_, | |||
| int | ntable_ = 1999 | |||
| ) |
Definition at line 1987 of file util_sparx.cpp.
References build_sBtable().
01988 : M(M_), fc(fc_), ntable(ntable_) { 01989 // Sinc-Blackman kernel 01990 build_sBtable(); 01991 }
| virtual EMAN::Util::sincBlackman::~sincBlackman | ( | ) | [inline, virtual] |
Member Function Documentation
| void Util::sincBlackman::build_sBtable | ( | ) | [protected, virtual] |
Definition at line 1993 of file util_sparx.cpp.
References fc, fltb, M, ntable, EMAN::Util::round(), sBtable, twopi, and x.
Referenced by sincBlackman().
01993 { 01994 sBtable.resize(ntable+1); 01995 int ltab = int(round(float(ntable)/1.25f)); 01996 int M2 = M/2; 01997 fltb = float(ltab)/M2; 01998 for (int i=ltab+1; i <= ntable; i++) sBtable[i] = 0.0f; 01999 float x = 1.0e-7f; 02000 sBtable[0] = (float)(sin(twopi*fc*x)/x*(0.52-0.5*cos(twopi*(x-M2)/M)+0.08*cos(2*twopi*(x-M2)/M))); 02001 for (int i=1; i <= ltab; i++) { 02002 x = float(i)/fltb; 02003 sBtable[i] = (float)(sin(twopi*fc*x)/x*(0.52-0.5*cos(twopi*(x-M2)/M)+0.08*cos(2*twopi*(x-M2)/M))); 02004 //cout << " "<<x<<" "<<sBtable[i] <<endl; 02005 } 02006 }
| float EMAN::Util::sincBlackman::sBwin_tab | ( | float | x | ) | const [inline] |
| int EMAN::Util::sincBlackman::get_sB_size | ( | ) | const [inline] |
Return the size of the kernel.
Definition at line 243 of file util.h.
Referenced by EMAN::EMData::get_pixel_filtered().
Member Data Documentation
int EMAN::Util::sincBlackman::M [protected] |
float EMAN::Util::sincBlackman::fc [protected] |
int EMAN::Util::sincBlackman::ntable [protected] |
vector<float> EMAN::Util::sincBlackman::sBtable [protected] |
float EMAN::Util::sincBlackman::fltb [protected] |
The documentation for this class was generated from the following files:
