EMAN::FlipProcessor Class Reference

flip an image around an axis More...

#include <processor.h>

Inheritance diagram for EMAN::FlipProcessor:

Inheritance graph
[legend]
Collaboration diagram for EMAN::FlipProcessor:

Collaboration graph
[legend]
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 4465 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 4487 of file processor.h.

04488                 {
04489                         return "flip an image around an axis.";
04490                 }

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 4470 of file processor.h.

References NAME.

04471                 {
04472                         return NAME;
04473                 }

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 4480 of file processor.h.

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

04481                 {
04482                         TypeDict d;
04483                         d.put("axis", EMObject::STRING, "'x', 'y', or 'z' axis. 'x' means horizonal flip; 'y' means vertical flip;");
04484                         return d;
04485                 }

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

Definition at line 4475 of file processor.h.

04476                 {
04477                         return new FlipProcessor();
04478                 }

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 4272 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.

04273 {
04274         ENTERFUNC;
04275         if (!image) {
04276                 LOGWARN("NULL Image");
04277                 return;
04278         }
04279         string axis = (const char*)params["axis"];
04280         
04281 #ifdef EMAN2_USING_CUDA
04282         if (image->getcudarwdata()) {
04283                 //cout << "flip processor" << endl;
04284                 float array[12] = {1.0, 0.0, 0.0, 0.0,
04285                                                    0.0, 1.0, 0.0, 0.0,
04286                                                    0.0, 0.0, 1.0, 0.0};
04287                 if (axis == "x" || axis == "X") {               // horizontal flip
04288                         array[0] = -1.0;
04289                 }else if (axis == "y" || axis == "Y") {         // vertical flip
04290                         array[5] = -1.0;
04291                 }
04292                 else if (axis == "z" || axis == "Z") {          // vertical flip
04293                         array[10] = -1.0;
04294                 }
04295                 Transform t(array);
04296                 Dict params("transform",(Transform*)&t);
04297                 image->process_inplace("xform",params);
04298 
04299                 EXITFUNC;
04300                 return;
04301         }
04302 #endif
04303 
04304 
04305         float *d = image->get_data();
04306         int nx = image->get_xsize();
04307         int ny = image->get_ysize();
04308         int nz = image->get_zsize();
04309 
04310         size_t nxy = nx * ny;
04311 
04312 
04313         // Note in all cases the origin is nx/2, ny/2 and nz/2
04314         // This means when flipping even sized dimensions that some pixels are redundant.
04315         // Here redundant pixels are set to zero, however, should this change to something
04316         // like the mean.
04317         if (axis == "x" || axis == "X") {               // Horizontal flip
04318                 int offset = (nx%2 == 0);
04319                 size_t idx1, idx2;
04320                 for(int z = 0; z < nz; ++z) {
04321                         for(int y = 0; y < ny; ++y) {
04322                                 if (offset != 0 ) {
04323                                         idx1 = z*nxy + y*nx;
04324                                         d[idx1] = 0; // Here's where you'd make it the mean
04325                                 }
04326                                 for(int x = offset; x < nx / 2; ++x) {
04327                                         idx1 = z*nxy + y*nx + x;
04328                                         idx2 = z*nxy + y*nx + (nx-x-1+offset);
04329                                         std::swap(d[idx1], d[idx2]);
04330                                 }
04331 
04332                         }
04333                 }
04334         }
04335 
04336         else if (axis == "y" || axis == "Y") {          // vertical flip
04337                 int offset = (ny%2 == 0);
04338                 for(int z=0; z<nz; ++z) {
04339                         if (offset != 0) {
04340                                 std::fill(d+z*nxy,d+(size_t)z*nxy+nx,0); // So if we have change it to the mean it's easy to do so. (instead of using memset)
04341                         }
04342                         for(int y=offset; y<ny/2; ++y) {
04343                                 for(int x=0; x<nx; ++x) {
04344                                         std::swap(d[(size_t)z*nxy + y*nx +x], d[(size_t)z*nxy + (ny -y -1+offset)*nx +x]);
04345                                 }
04346                         }
04347                 }
04348         }
04349         else if (axis == "z" || axis == "Z") {          //z axis flip
04350                 int offset = (nz%2 == 0);
04351                 if (offset != 0) {
04352                         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)
04353                 }
04354                 size_t idx1, idx2;
04355                 for(int z=offset; z<nz/2; ++z) {
04356                         for(int y=0; y<ny; ++y) {
04357                                 for(int x=0; x<nx; ++x) {
04358                                         idx1 = (size_t)z*nxy + y*nx + x;
04359                                         idx2 = (size_t)(nz-z-1+offset)*nxy + y*nx + x;
04360                                         std::swap(d[idx1], d[idx2]);
04361                                 }
04362                         }
04363                 }
04364         }
04365 
04366         image->update();
04367         EXITFUNC;
04368 }


Member Data Documentation

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

Definition at line 4492 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Mon May 2 13:30:42 2011 for EMAN2 by  doxygen 1.4.7