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EMAN::CCDNormProcessor Class Reference

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

#include <processor.h>

Inheritance diagram for EMAN::CCDNormProcessor:

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Collaboration diagram for EMAN::CCDNormProcessor:
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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

ProcessorNEW ()

Static Public Attributes

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 6558 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 6573 of file processor.h.

06574                 {
06575                         return "normalize the 4 quadrants of a CCD image";
06576                 }

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 6563 of file processor.h.

06564                 {
06565                         return NAME;
06566                 }

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 6578 of file processor.h.

References EMAN::TypeDict::put().

06579                 {
06580                         TypeDict d;
06581                         d.put("width", EMObject::INT, "number of pixels on either side of the seam to sample");
06582                         return d;
06583                 }

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

Definition at line 6568 of file processor.h.

06569                 {
06570                         return new CCDNormProcessor();
06571                 }

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 7793 of file processor.cpp.

References EMAN::Log::error(), 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::Log::set_level(), EMAN::EMData::set_value_at_fast(), x, and y.

07794 {
07795         if (!image) {
07796           Log::logger()->set_level(Log::ERROR_LOG);
07797           Log::logger()->error("Null image during call to CCDNorm\n");
07798           return;
07799         }
07800         if (image->get_zsize() > 1) {
07801           Log::logger()->set_level(Log::ERROR_LOG);
07802           Log::logger()->error("CCDNorm does not support 3d images\n");
07803           return;
07804         }
07805 
07806         int xs = image->get_xsize();
07807         int ys = image->get_ysize();
07808 
07809         // width of sample area on either side of the seams
07810         int width = params["width"];
07811 
07812         width%=(xs > ys ? xs/2 : ys/2);  // make sure width is a valid value
07813         if (width==0) {
07814           width=1;
07815         }
07816 
07817         // get the 4 "seams" of the image
07818         float *left, *right, *top, *bottom;
07819 
07820         double *temp;
07821         temp= (double*)malloc((xs > ys ? xs*width : ys*width)*sizeof(double));
07822         if (temp==NULL) {
07823           Log::logger()->set_level(Log::ERROR_LOG);
07824           Log::logger()->error("Could not allocate enough memory during call to CCDNorm\n");
07825           return;
07826         }
07827 
07828         int x, y, z;
07829 
07830         // the mean values of each seam and the average
07831         double mL,mR,mT,mB;
07832 
07833         // how much to shift each seam
07834         double nl,nr,nt,nb;
07835 
07836         // quad. shifting amount
07837         double q1,q2,q3,q4;
07838 
07839         // calc. the mean for each quadrant
07840         for (z=0; z<width; z++) {
07841           left = image->get_col(xs/2 -1-z)->get_data();
07842           for (y=0; y<ys; y++)
07843             temp[z*ys+y]=left[y];
07844         }
07845         mL=gsl_stats_mean(temp,1,ys*width);
07846 
07847         for (z=0; z<width; z++) {
07848           right = image->get_col(xs/2 +z)->get_data();
07849           for (y=0; y<ys; y++)
07850             temp[z*ys+y]=right[y];
07851         }
07852         mR=gsl_stats_mean(temp,1,ys*width);
07853 
07854         for (z=0; z<width; z++) {
07855           top = image->get_row(ys/2 -1-z)->get_data();
07856           for (x=0; x<xs; x++)
07857             temp[z*xs+x]=top[x];
07858         }
07859         mT=gsl_stats_mean(temp,1,xs*width);
07860 
07861         for (z=0; z<width; z++) {
07862           bottom = image->get_row(ys/2 +z)->get_data();
07863           for (x=0; x<xs; x++)
07864             temp[z*xs+x]=bottom[x];
07865         }
07866         mB=gsl_stats_mean(temp,1,xs*width);
07867 
07868         free(temp);
07869 
07870         nl=(mL+mR)/2-mL;
07871         nr=(mL+mR)/2-mR;
07872         nt=(mT+mB)/2-mT;
07873         nb=(mT+mB)/2-mB;
07874 
07875         q1=nl+nt;
07876         q2=nr+nt;
07877         q3=nr+nb;
07878         q4=nl+nb;
07879 
07880         // change the pixel values
07881         for (x = 0; x < xs / 2; x++)
07882           for (y = 0; y < ys / 2; y++) {
07883             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q1));
07884           }
07885         for (x = xs / 2; x < xs; x++)
07886           for (y = 0; y < ys / 2; y++) {
07887             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q2));
07888           }
07889         for (x = xs / 2; x < xs; x++)
07890           for (y = ys / 2; y < ys; y++) {
07891             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q3));
07892           }
07893         for (x = 0; x < xs / 2; x++)
07894           for (y = ys / 2; y < ys; y++) {
07895             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q4));
07896           }
07897 
07898 }


Member Data Documentation

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

Definition at line 210 of file processor.cpp.


The documentation for this class was generated from the following files:
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