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 6596 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 6611 of file processor.h.

06612                 {
06613                         return "normalize the 4 quadrants of a CCD image";
06614                 }

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 6601 of file processor.h.

References NAME.

06602                 {
06603                         return NAME;
06604                 }

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 6616 of file processor.h.

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

06617                 {
06618                         TypeDict d;
06619                         d.put("width", EMObject::INT, "number of pixels on either side of the seam to sample");
06620                         return d;
06621                 }

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

Definition at line 6606 of file processor.h.

06607                 {
06608                         return new CCDNormProcessor();
06609                 }

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 8012 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.

08013 {
08014         if (!image) {
08015           Log::logger()->set_level(Log::ERROR_LOG);
08016           Log::logger()->error("Null image during call to CCDNorm\n");
08017           return;
08018         }
08019         if (image->get_zsize() > 1) {
08020           Log::logger()->set_level(Log::ERROR_LOG);
08021           Log::logger()->error("CCDNorm does not support 3d images\n");
08022           return;
08023         }
08024 
08025         int xs = image->get_xsize();
08026         int ys = image->get_ysize();
08027 
08028         // width of sample area on either side of the seams
08029         int width = params["width"];
08030 
08031         width%=(xs > ys ? xs/2 : ys/2);  // make sure width is a valid value
08032         if (width==0) {
08033           width=1;
08034         }
08035 
08036         // get the 4 "seams" of the image
08037         float *left, *right, *top, *bottom;
08038 
08039         double *temp;
08040         temp= (double*)malloc((xs > ys ? xs*width : ys*width)*sizeof(double));
08041         if (temp==NULL) {
08042           Log::logger()->set_level(Log::ERROR_LOG);
08043           Log::logger()->error("Could not allocate enough memory during call to CCDNorm\n");
08044           return;
08045         }
08046 
08047         int x, y, z;
08048 
08049         // the mean values of each seam and the average
08050         double mL,mR,mT,mB;
08051 
08052         // how much to shift each seam
08053         double nl,nr,nt,nb;
08054 
08055         // quad. shifting amount
08056         double q1,q2,q3,q4;
08057 
08058         // calc. the mean for each quadrant
08059         for (z=0; z<width; z++) {
08060           left = image->get_col(xs/2 -1-z)->get_data();
08061           for (y=0; y<ys; y++)
08062             temp[z*ys+y]=left[y];
08063         }
08064         mL=gsl_stats_mean(temp,1,ys*width);
08065 
08066         for (z=0; z<width; z++) {
08067           right = image->get_col(xs/2 +z)->get_data();
08068           for (y=0; y<ys; y++)
08069             temp[z*ys+y]=right[y];
08070         }
08071         mR=gsl_stats_mean(temp,1,ys*width);
08072 
08073         for (z=0; z<width; z++) {
08074           top = image->get_row(ys/2 -1-z)->get_data();
08075           for (x=0; x<xs; x++)
08076             temp[z*xs+x]=top[x];
08077         }
08078         mT=gsl_stats_mean(temp,1,xs*width);
08079 
08080         for (z=0; z<width; z++) {
08081           bottom = image->get_row(ys/2 +z)->get_data();
08082           for (x=0; x<xs; x++)
08083             temp[z*xs+x]=bottom[x];
08084         }
08085         mB=gsl_stats_mean(temp,1,xs*width);
08086 
08087         free(temp);
08088 
08089         nl=(mL+mR)/2-mL;
08090         nr=(mL+mR)/2-mR;
08091         nt=(mT+mB)/2-mT;
08092         nb=(mT+mB)/2-mB;
08093 
08094         q1=nl+nt;
08095         q2=nr+nt;
08096         q3=nr+nb;
08097         q4=nl+nb;
08098 
08099         // change the pixel values
08100         for (x = 0; x < xs / 2; x++)
08101           for (y = 0; y < ys / 2; y++) {
08102             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q1));
08103           }
08104         for (x = xs / 2; x < xs; x++)
08105           for (y = 0; y < ys / 2; y++) {
08106             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q2));
08107           }
08108         for (x = xs / 2; x < xs; x++)
08109           for (y = ys / 2; y < ys; y++) {
08110             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q3));
08111           }
08112         for (x = 0; x < xs / 2; x++)
08113           for (y = ys / 2; y < ys; y++) {
08114             image->set_value_at_fast(x, y, image->get_value_at(x, y) + static_cast<float>(q4));
08115           }
08116 
08117 }


Member Data Documentation

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

Definition at line 6623 of file processor.h.

Referenced by get_name().


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