EMAN::CCDNormProcessor Class Reference

Try to normalize the 4 quadrants of a CCD image. More...

#include <processor.h>

Inheritance diagram for EMAN::CCDNormProcessor:

Inheritance graph
[legend]
Collaboration diagram for EMAN::CCDNormProcessor:

Collaboration graph
[legend]
List of all members.

Public Member Functions

virtual void process_inplace (EMData *image)
 To process an image in-place.
virtual string get_name () const
 Get the processor's name.
virtual string get_desc () const
 Get the descrition of this specific processor.
virtual TypeDict get_param_types () const
 Get processor parameter information in a dictionary.

Static Public Member Functions

static ProcessorNEW ()

Static Public Attributes

static const string NAME = "filter.ccdnorm"

Detailed Description

Try to normalize the 4 quadrants of a CCD image.

Author:
Deepy Mann <dsmann@bcm.tmc.edu>
Date:
9-2005
Parameters:
width number of pixels on either side of the seam to sample

Definition at line 6559 of file processor.h.


Member Function Documentation

virtual string EMAN::CCDNormProcessor::get_desc (  )  const [inline, virtual]

Get the descrition of this specific processor.

This function must be overwritten by a subclass.

Returns:
The description of this processor.

Implements EMAN::Processor.

Definition at line 6574 of file processor.h.

06575                 {
06576                         return "normalize the 4 quadrants of a CCD image";
06577                 }

virtual string EMAN::CCDNormProcessor::get_name (  )  const [inline, virtual]

Get the processor's name.

Each processor is identified by a unique name.

Returns:
The processor's name.

Implements EMAN::Processor.

Definition at line 6564 of file processor.h.

References NAME.

06565                 {
06566                         return NAME;
06567                 }

virtual TypeDict EMAN::CCDNormProcessor::get_param_types (  )  const [inline, virtual]

Get processor parameter information in a dictionary.

Each parameter has one record in the dictionary. Each record contains its name, data-type, and description.

Returns:
A dictionary containing the parameter info.

Reimplemented from EMAN::Processor.

Definition at line 6579 of file processor.h.

References EMAN::EMObject::INT, and EMAN::TypeDict::put().

06580                 {
06581                         TypeDict d;
06582                         d.put("width", EMObject::INT, "number of pixels on either side of the seam to sample");
06583                         return d;
06584                 }

static Processor* EMAN::CCDNormProcessor::NEW (  )  [inline, static]

Definition at line 6569 of file processor.h.

06570                 {
06571                         return new CCDNormProcessor();
06572                 }

void CCDNormProcessor::process_inplace ( EMData image  )  [virtual]

To process an image in-place.

For those processors which can only be processed out-of-place, override this function to just print out some error message to remind user call the out-of-place version.

Parameters:
image The image to be processed.

Implements EMAN::Processor.

Definition at line 7824 of file processor.cpp.

References EMAN::Log::error(), EMAN::Log::ERROR_LOG, EMAN::EMData::get_col(), EMAN::EMData::get_data(), EMAN::EMData::get_row(), EMAN::EMData::get_value_at(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), EMAN::Log::logger(), EMAN::Processor::params, EMAN::Log::set_level(), EMAN::EMData::set_value_at_fast(), and x.

07825 {
07826         if (!image) {
07827           Log::logger()->set_level(Log::ERROR_LOG);
07828           Log::logger()->error("Null image during call to CCDNorm\n");
07829           return;
07830         }
07831         if (image->get_zsize() > 1) {
07832           Log::logger()->set_level(Log::ERROR_LOG);
07833           Log::logger()->error("CCDNorm does not support 3d images\n");
07834           return;
07835         }
07836 
07837         int xs = image->get_xsize();
07838         int ys = image->get_ysize();
07839 
07840         // width of sample area on either side of the seams
07841         int width = params["width"];
07842 
07843         width%=(xs > ys ? xs/2 : ys/2);  // make sure width is a valid value
07844         if (width==0) {
07845           width=1;
07846         }
07847 
07848         // get the 4 "seams" of the image
07849         float *left, *right, *top, *bottom;
07850 
07851         double *temp;
07852         temp= (double*)malloc((xs > ys ? xs*width : ys*width)*sizeof(double));
07853         if (temp==NULL) {
07854           Log::logger()->set_level(Log::ERROR_LOG);
07855           Log::logger()->error("Could not allocate enough memory during call to CCDNorm\n");
07856           return;
07857         }
07858 
07859         int x, y, z;
07860 
07861         // the mean values of each seam and the average
07862         double mL,mR,mT,mB;
07863 
07864         // how much to shift each seam
07865         double nl,nr,nt,nb;
07866 
07867         // quad. shifting amount
07868         double q1,q2,q3,q4;
07869 
07870         // calc. the mean for each quadrant
07871         for (z=0; z<width; z++) {
07872           left = image->get_col(xs/2 -1-z)->get_data();
07873           for (y=0; y<ys; y++)
07874             temp[z*ys+y]=left[y];
07875         }
07876         mL=gsl_stats_mean(temp,1,ys*width);
07877 
07878         for (z=0; z<width; z++) {
07879           right = image->get_col(xs/2 +z)->get_data();
07880           for (y=0; y<ys; y++)
07881             temp[z*ys+y]=right[y];
07882         }
07883         mR=gsl_stats_mean(temp,1,ys*width);
07884 
07885         for (z=0; z<width; z++) {
07886           top = image->get_row(ys/2 -1-z)->get_data();
07887           for (x=0; x<xs; x++)
07888             temp[z*xs+x]=top[x];
07889         }
07890         mT=gsl_stats_mean(temp,1,xs*width);
07891 
07892         for (z=0; z<width; z++) {
07893           bottom = image->get_row(ys/2 +z)->get_data();
07894           for (x=0; x<xs; x++)
07895             temp[z*xs+x]=bottom[x];
07896         }
07897         mB=gsl_stats_mean(temp,1,xs*width);
07898 
07899         free(temp);
07900 
07901         nl=(mL+mR)/2-mL;
07902         nr=(mL+mR)/2-mR;
07903         nt=(mT+mB)/2-mT;
07904         nb=(mT+mB)/2-mB;
07905 
07906         q1=nl+nt;
07907         q2=nr+nt;
07908         q3=nr+nb;
07909         q4=nl+nb;
07910 
07911         // change the pixel values
07912         for (x = 0; x < xs / 2; x++)
07913           for (y = 0; y < ys / 2; y++) {
07914             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q1));
07915           }
07916         for (x = xs / 2; x < xs; x++)
07917           for (y = 0; y < ys / 2; y++) {
07918             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q2));
07919           }
07920         for (x = xs / 2; x < xs; x++)
07921           for (y = ys / 2; y < ys; y++) {
07922             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q3));
07923           }
07924         for (x = 0; x < xs / 2; x++)
07925           for (y = ys / 2; y < ys; y++) {
07926             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q4));
07927           }
07928 
07929 }


Member Data Documentation

const string CCDNormProcessor::NAME = "filter.ccdnorm" [static]

Definition at line 6586 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Tue May 25 17:17:40 2010 for EMAN2 by  doxygen 1.4.7