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EMAN::QuadMinDotCmp Class Reference

This will calculate the dot product for each quadrant of the image and return the worst value. More...

#include <cmp.h>

Inheritance diagram for EMAN::QuadMinDotCmp:

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Collaboration diagram for EMAN::QuadMinDotCmp:

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List of all members.

Public Member Functions

float cmp (EMData *image, EMData *with) const
 To compare 'image' with another image passed in through its parameters.
string get_name () const
 Get the Cmp's name.
string get_desc () const
TypeDict get_param_types () const
 Get Cmp parameter information in a dictionary.

Static Public Member Functions

CmpNEW ()

Static Public Attributes

const string NAME = "quadmindot"

Detailed Description

This will calculate the dot product for each quadrant of the image and return the worst value.

Author:
Steve Ludtke (sludtke@bcm.tmc.edu)
Date:
2005-07-13
Parameters:
negative Returns -1 * dot product, default true
normalize Returns normalized dot product -1.0 - 1.0

Definition at line 403 of file cmp.h.


Member Function Documentation

float QuadMinDotCmp::cmp EMData image,
EMData with
const [virtual]
 

To compare 'image' with another image passed in through its parameters.

An optional transformation may be used to transform the 2 images.

Parameters:
image The first image to be compared.
with The second image to be comppared.
Returns:
The comparison result. Smaller better by default

Implements EMAN::Cmp.

Definition at line 812 of file cmp.cpp.

References EMAN::EMData::get_array_offsets(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), InvalidValueException, nx, ny, EMAN::EMData::set_array_offsets(), EMAN::Dict::set_default(), sqrt(), EMAN::Cmp::validate_input_args(), x, and y.

00813 {
00814         ENTERFUNC;
00815         validate_input_args(image, with);
00816 
00817         if (image->get_zsize()!=1) throw InvalidValueException(0, "QuadMinDotCmp supports 2D only");
00818 
00819         int nx=image->get_xsize();
00820         int ny=image->get_ysize();
00821 
00822         int normalize = params.set_default("normalize", 0);
00823         float negative = (float)params.set_default("negative", 1);
00824 
00825         if (negative) negative=-1.0; else negative=1.0;
00826 
00827         double result[4] = { 0,0,0,0 }, sq1[4] = { 0,0,0,0 }, sq2[4] = { 0,0,0,0 } ;
00828 
00829         vector<int> image_saved_offsets = image->get_array_offsets();
00830         vector<int> with_saved_offsets = with->get_array_offsets();
00831         image->set_array_offsets(-nx/2,-ny/2);
00832         with->set_array_offsets(-nx/2,-ny/2);
00833         int i,x,y;
00834         for (y=-ny/2; y<ny/2; y++) {
00835                 for (x=-nx/2; x<nx/2; x++) {
00836                         int quad=(x<0?0:1) + (y<0?0:2);
00837                         result[quad]+=(*image)(x,y)*(*with)(x,y);
00838                         if (normalize) {
00839                                 sq1[quad]+=(*image)(x,y)*(*image)(x,y);
00840                                 sq2[quad]+=(*with)(x,y)*(*with)(x,y);
00841                         }
00842                 }
00843         }
00844         image->set_array_offsets(image_saved_offsets);
00845         with->set_array_offsets(with_saved_offsets);
00846 
00847         if (normalize) {
00848                 for (i=0; i<4; i++) result[i]/=sqrt(sq1[i]*sq2[i]);
00849         } else {
00850                 for (i=0; i<4; i++) result[i]/=nx*ny/4;
00851         }
00852 
00853         float worst=static_cast<float>(result[0]);
00854         for (i=1; i<4; i++) if (static_cast<float>(result[i])<worst) worst=static_cast<float>(result[i]);
00855 
00856         EXITFUNC;
00857         return (float) (negative*worst);
00858 }

string EMAN::QuadMinDotCmp::get_desc  )  const [inline, virtual]
 

Implements EMAN::Cmp.

Definition at line 413 of file cmp.h.

00414                 {
00415                         return "Calculates dot product for each quadrant and returns worst value (default -1 * dot product)";
00416                 }

string EMAN::QuadMinDotCmp::get_name  )  const [inline, virtual]
 

Get the Cmp's name.

Each Cmp is identified by a unique name.

Returns:
The Cmp's name.

Implements EMAN::Cmp.

Definition at line 408 of file cmp.h.

00409                 {
00410                         return NAME;
00411                 }

TypeDict EMAN::QuadMinDotCmp::get_param_types  )  const [inline, virtual]
 

Get Cmp 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.

Implements EMAN::Cmp.

Definition at line 423 of file cmp.h.

References EMAN::TypeDict::put().

00424                 {
00425                         TypeDict d;
00426                         d.put("negative", EMObject::INT, "If set, returns -1 * dot product. Default = true (smaller is better)");
00427                         d.put("normalize", EMObject::INT, "If set, returns normalized dot product -1.0 - 1.0.");
00428                         return d;
00429                 }

Cmp* EMAN::QuadMinDotCmp::NEW  )  [inline, static]
 

Definition at line 418 of file cmp.h.

00419                 {
00420                         return new QuadMinDotCmp();
00421                 }


Member Data Documentation

const string QuadMinDotCmp::NAME = "quadmindot" [static]
 

Definition at line 53 of file cmp.cpp.


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