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EMAN::FlipProcessor Class Reference

flip an image around an axis More...

#include <processor.h>

Inheritance diagram for EMAN::FlipProcessor:

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Collaboration diagram for EMAN::FlipProcessor:

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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 TypeDict get_param_types () const
 Get processor parameter information in a dictionary.
virtual string get_desc () const
 Get the descrition of this specific processor.

Static Public Member Functions

static ProcessorNEW ()

Static Public Attributes

static const string NAME = "xform.flip"

Detailed Description

flip an image around an axis

Parameters:
axis 'x', 'y', or 'z' axis. 'x' means horizonal flip; 'y' means vertical flip;

Definition at line 4500 of file processor.h.


Member Function Documentation

virtual string EMAN::FlipProcessor::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 4522 of file processor.h.

04523                 {
04524                         return "flip an image around an axis.";
04525                 }

virtual string EMAN::FlipProcessor::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 4505 of file processor.h.

References NAME.

04506                 {
04507                         return NAME;
04508                 }

virtual TypeDict EMAN::FlipProcessor::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 4515 of file processor.h.

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

04516                 {
04517                         TypeDict d;
04518                         d.put("axis", EMObject::STRING, "'x', 'y', or 'z' axis. 'x' means horizonal flip; 'y' means vertical flip;");
04519                         return d;
04520                 }

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

Definition at line 4510 of file processor.h.

04511                 {
04512                         return new FlipProcessor();
04513                 }

void FlipProcessor::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 4246 of file processor.cpp.

References ENTERFUNC, EXITFUNC, EMAN::EMData::get_data(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), LOGWARN, EMAN::Processor::params, EMAN::EMData::process_inplace(), t, EMAN::EMData::update(), and x.

04247 {
04248         ENTERFUNC;
04249         if (!image) {
04250                 LOGWARN("NULL Image");
04251                 return;
04252         }
04253         string axis = (const char*)params["axis"];
04254 #ifdef EMAN2_USING_CUDA
04255         if (image->gpu_operation_preferred()) {
04256                 float array[12] = {1.0, 0.0, 0.0, 0.0,
04257                                                    0.0, 1.0, 0.0, 0.0,
04258                                                    0.0, 0.0, 1.0, 0.0};
04259                 if (axis == "x" || axis == "X") {               // horizontal flip
04260                         array[0] = -1.0;
04261                 }else if (axis == "y" || axis == "Y") {         // vertical flip
04262                         array[5] = -1.0;
04263                 }
04264                 else if (axis == "z" || axis == "Z") {          // vertical flip
04265                         array[10] = -1.0;
04266                 }
04267                 Transform t(array);
04268                 Dict params("transform",(Transform*)&t);
04269                 image->process_inplace("xform",params);
04270                 EXITFUNC;
04271                 return;
04272         }
04273 #endif
04274 
04275 
04276         float *d = image->get_data();
04277         int nx = image->get_xsize();
04278         int ny = image->get_ysize();
04279         int nz = image->get_zsize();
04280 
04281         size_t nxy = nx * ny;
04282 
04283 
04284         // Note in all cases the origin is nx/2, ny/2 and nz/2
04285         // This means when flipping even sized dimensions that some pixels are redundant.
04286         // Here redundant pixels are set to zero, however, should this change to something
04287         // like the mean.
04288         if (axis == "x" || axis == "X") {               // Horizontal flip
04289                 int offset = (nx%2 == 0);
04290                 size_t idx1, idx2;
04291                 for(int z = 0; z < nz; ++z) {
04292                         for(int y = 0; y < ny; ++y) {
04293                                 if (offset != 0 ) {
04294                                         idx1 = z*nxy + y*nx;
04295                                         d[idx1] = 0; // Here's where you'd make it the mean
04296                                 }
04297                                 for(int x = offset; x < nx / 2; ++x) {
04298                                         idx1 = z*nxy + y*nx + x;
04299                                         idx2 = z*nxy + y*nx + (nx-x-1+offset);
04300                                         std::swap(d[idx1], d[idx2]);
04301                                 }
04302 
04303                         }
04304                 }
04305         }
04306 
04307         else if (axis == "y" || axis == "Y") {          // vertical flip
04308                 int offset = (ny%2 == 0);
04309                 for(int z=0; z<nz; ++z) {
04310                         if (offset != 0) {
04311                                 std::fill(d+z*nxy,d+z*nxy+nx,0); // So if we have change it to the mean it's easy to do so. (instead of using memset)
04312                         }
04313                         for(int y=offset; y<ny/2; ++y) {
04314                                 for(int x=0; x<nx; ++x) {
04315                                         std::swap(d[z*nxy + y*nx +x], d[z*nxy + (ny -y -1+offset)*nx +x]);
04316                                 }
04317                         }
04318                 }
04319         }
04320         else if (axis == "z" || axis == "Z") {          //z axis flip
04321                 int offset = (nz%2 == 0);
04322                 if (offset != 0) {
04323                         std::fill(d,d+nxy,0);// So if we have change it to the mean it's easy to do so. (instead of using memset)
04324                 }
04325                 size_t idx1, idx2;
04326                 for(int z=offset; z<nz/2; ++z) {
04327                         for(int y=0; y<ny; ++y) {
04328                                 for(int x=0; x<nx; ++x) {
04329                                         idx1 = z*nxy + y*nx + x;
04330                                         idx2 = (nz-z-1+offset)*nxy + y*nx + x;
04331                                         std::swap(d[idx1], d[idx2]);
04332                                 }
04333                         }
04334                 }
04335         }
04336 
04337         image->update();
04338         EXITFUNC;
04339 }


Member Data Documentation

const string FlipProcessor::NAME = "xform.flip" [static]
 

Definition at line 4527 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Tue May 25 17:37:31 2010 for EMAN2 by  doxygen 1.4.4