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 4409 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 4431 of file processor.h.

04432                 {
04433                         return "flip an image around an axis.";
04434                 }

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 4414 of file processor.h.

References NAME.

04415                 {
04416                         return NAME;
04417                 }

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 4424 of file processor.h.

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

04425                 {
04426                         TypeDict d;
04427                         d.put("axis", EMObject::STRING, "'x', 'y', or 'z' axis. 'x' means horizonal flip; 'y' means vertical flip;");
04428                         return d;
04429                 }

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

Definition at line 4419 of file processor.h.

04420                 {
04421                         return new FlipProcessor();
04422                 }

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 4274 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.

04275 {
04276         ENTERFUNC;
04277         if (!image) {
04278                 LOGWARN("NULL Image");
04279                 return;
04280         }
04281         string axis = (const char*)params["axis"];
04282         
04283 #ifdef EMAN2_USING_CUDA
04284         if (image->cudarwdata) {
04285                 //cout << "flip processor" << endl;
04286                 float array[12] = {1.0, 0.0, 0.0, 0.0,
04287                                                    0.0, 1.0, 0.0, 0.0,
04288                                                    0.0, 0.0, 1.0, 0.0};
04289                 if (axis == "x" || axis == "X") {               // horizontal flip
04290                         array[0] = -1.0;
04291                 }else if (axis == "y" || axis == "Y") {         // vertical flip
04292                         array[5] = -1.0;
04293                 }
04294                 else if (axis == "z" || axis == "Z") {          // vertical flip
04295                         array[10] = -1.0;
04296                 }
04297                 Transform t(array);
04298                 Dict params("transform",(Transform*)&t);
04299                 image->process_inplace("xform",params);
04300 
04301                 EXITFUNC;
04302                 return;
04303         }
04304 #endif
04305 
04306 
04307         float *d = image->get_data();
04308         int nx = image->get_xsize();
04309         int ny = image->get_ysize();
04310         int nz = image->get_zsize();
04311 
04312         size_t nxy = nx * ny;
04313 
04314 
04315         // Note in all cases the origin is nx/2, ny/2 and nz/2
04316         // This means when flipping even sized dimensions that some pixels are redundant.
04317         // Here redundant pixels are set to zero, however, should this change to something
04318         // like the mean.
04319         if (axis == "x" || axis == "X") {               // Horizontal flip
04320                 int offset = (nx%2 == 0);
04321                 size_t idx1, idx2;
04322                 for(int z = 0; z < nz; ++z) {
04323                         for(int y = 0; y < ny; ++y) {
04324                                 if (offset != 0 ) {
04325                                         idx1 = z*nxy + y*nx;
04326                                         d[idx1] = 0; // Here's where you'd make it the mean
04327                                 }
04328                                 for(int x = offset; x < nx / 2; ++x) {
04329                                         idx1 = z*nxy + y*nx + x;
04330                                         idx2 = z*nxy + y*nx + (nx-x-1+offset);
04331                                         std::swap(d[idx1], d[idx2]);
04332                                 }
04333 
04334                         }
04335                 }
04336         }
04337 
04338         else if (axis == "y" || axis == "Y") {          // vertical flip
04339                 int offset = (ny%2 == 0);
04340                 for(int z=0; z<nz; ++z) {
04341                         if (offset != 0) {
04342                                 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)
04343                         }
04344                         for(int y=offset; y<ny/2; ++y) {
04345                                 for(int x=0; x<nx; ++x) {
04346                                         std::swap(d[(size_t)z*nxy + y*nx +x], d[(size_t)z*nxy + (ny -y -1+offset)*nx +x]);
04347                                 }
04348                         }
04349                 }
04350         }
04351         else if (axis == "z" || axis == "Z") {          //z axis flip
04352                 int offset = (nz%2 == 0);
04353                 if (offset != 0) {
04354                         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)
04355                 }
04356                 size_t idx1, idx2;
04357                 for(int z=offset; z<nz/2; ++z) {
04358                         for(int y=0; y<ny; ++y) {
04359                                 for(int x=0; x<nx; ++x) {
04360                                         idx1 = (size_t)z*nxy + y*nx + x;
04361                                         idx2 = (size_t)(nz-z-1+offset)*nxy + y*nx + x;
04362                                         std::swap(d[idx1], d[idx2]);
04363                                 }
04364                         }
04365                 }
04366         }
04367 
04368         image->update();
04369         EXITFUNC;
04370 }


Member Data Documentation

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

Definition at line 4436 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Mon Mar 7 18:02:59 2011 for EMAN2 by  doxygen 1.4.7