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

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 6488 of file processor.h.


Member Function Documentation

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 7782 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.

07783 {
07784         if (!image) {
07785           Log::logger()->set_level(Log::ERROR_LOG);
07786           Log::logger()->error("Null image during call to CCDNorm\n");
07787           return;
07788         }
07789         if (image->get_zsize() > 1) {
07790           Log::logger()->set_level(Log::ERROR_LOG);
07791           Log::logger()->error("CCDNorm does not support 3d images\n");
07792           return;
07793         }
07794 
07795         int xs = image->get_xsize();
07796         int ys = image->get_ysize();
07797 
07798         // width of sample area on either side of the seams
07799         int width = params["width"];
07800 
07801         width%=(xs > ys ? xs/2 : ys/2);  // make sure width is a valid value
07802         if (width==0) {
07803           width=1;
07804         }
07805 
07806         // get the 4 "seams" of the image
07807         float *left, *right, *top, *bottom;
07808 
07809         double *temp;
07810         temp= (double*)malloc((xs > ys ? xs*width : ys*width)*sizeof(double));
07811         if (temp==NULL) {
07812           Log::logger()->set_level(Log::ERROR_LOG);
07813           Log::logger()->error("Could not allocate enough memory during call to CCDNorm\n");
07814           return;
07815         }
07816 
07817         int x, y, z;
07818 
07819         // the mean values of each seam and the average
07820         double mL,mR,mT,mB;
07821 
07822         // how much to shift each seam
07823         double nl,nr,nt,nb;
07824 
07825         // quad. shifting amount
07826         double q1,q2,q3,q4;
07827 
07828         // calc. the mean for each quadrant
07829         for (z=0; z<width; z++) {
07830           left = image->get_col(xs/2 -1-z)->get_data();
07831           for (y=0; y<ys; y++)
07832             temp[z*ys+y]=left[y];
07833         }
07834         mL=gsl_stats_mean(temp,1,ys*width);
07835 
07836         for (z=0; z<width; z++) {
07837           right = image->get_col(xs/2 +z)->get_data();
07838           for (y=0; y<ys; y++)
07839             temp[z*ys+y]=right[y];
07840         }
07841         mR=gsl_stats_mean(temp,1,ys*width);
07842 
07843         for (z=0; z<width; z++) {
07844           top = image->get_row(ys/2 -1-z)->get_data();
07845           for (x=0; x<xs; x++)
07846             temp[z*xs+x]=top[x];
07847         }
07848         mT=gsl_stats_mean(temp,1,xs*width);
07849 
07850         for (z=0; z<width; z++) {
07851           bottom = image->get_row(ys/2 +z)->get_data();
07852           for (x=0; x<xs; x++)
07853             temp[z*xs+x]=bottom[x];
07854         }
07855         mB=gsl_stats_mean(temp,1,xs*width);
07856 
07857         free(temp);
07858 
07859         nl=(mL+mR)/2-mL;
07860         nr=(mL+mR)/2-mR;
07861         nt=(mT+mB)/2-mT;
07862         nb=(mT+mB)/2-mB;
07863 
07864         q1=nl+nt;
07865         q2=nr+nt;
07866         q3=nr+nb;
07867         q4=nl+nb;
07868 
07869         // change the pixel values
07870         for (x = 0; x < xs / 2; x++)
07871           for (y = 0; y < ys / 2; y++) {
07872             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q1));
07873           }
07874         for (x = xs / 2; x < xs; x++)
07875           for (y = 0; y < ys / 2; y++) {
07876             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q2));
07877           }
07878         for (x = xs / 2; x < xs; x++)
07879           for (y = ys / 2; y < ys; y++) {
07880             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q3));
07881           }
07882         for (x = 0; x < xs / 2; x++)
07883           for (y = ys / 2; y < ys; y++) {
07884             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q4));
07885           }
07886 
07887 }

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 6493 of file processor.h.

References EMAN::NormalizeUnitSumProcessor::NAME.

06494                 {
06495                         return NAME;
06496                 }

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

Definition at line 6498 of file processor.h.

06499                 {
06500                         return new CCDNormProcessor();
06501                 }

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 6503 of file processor.h.

06504                 {
06505                         return "normalize the 4 quadrants of a CCD image";
06506                 }

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 6508 of file processor.h.

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

06509                 {
06510                         TypeDict d;
06511                         d.put("width", EMObject::INT, "number of pixels on either side of the seam to sample");
06512                         return d;
06513                 }


Member Data Documentation

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

Definition at line 6515 of file processor.h.


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

Generated on Fri Mar 19 02:20:47 2010 for EMAN2 by  doxygen 1.5.6