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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

ProcessorNEW ()

Static Public Attributes

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 4579 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 4601 of file processor.h.

04602                 {
04603                         return "Mirrors an image along the specified axis, preserving the center. This will introduce a plane of 0's for even box sizes. Use 'xform.mirror' processor to avoid the zero plane, but not preserve the center.";
04604                 }

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 4584 of file processor.h.

04585                 {
04586                         return NAME;
04587                 }

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 4594 of file processor.h.

References EMAN::TypeDict::put().

04595                 {
04596                         TypeDict d;
04597                         d.put("axis", EMObject::STRING, "'x', 'y', or 'z' axis.");
04598                         return d;
04599                 }

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

Definition at line 4589 of file processor.h.

04590                 {
04591                         return new FlipProcessor();
04592                 }

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 4391 of file processor.cpp.

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

04392 {
04393         ENTERFUNC;
04394         if (!image) {
04395                 LOGWARN("NULL Image");
04396                 return;
04397         }
04398         string axis = (const char*)params["axis"];
04399         
04400 #ifdef EMAN2_USING_CUDA
04401         if (EMData::usecuda == 1 && image->getcudarwdata()) {
04402                 //cout << "flip processor" << endl;
04403                 float array[12] = {1.0, 0.0, 0.0, 0.0,
04404                                                    0.0, 1.0, 0.0, 0.0,
04405                                                    0.0, 0.0, 1.0, 0.0};
04406                 if (axis == "x" || axis == "X") {               // horizontal flip
04407                         array[0] = -1.0;
04408                 }else if (axis == "y" || axis == "Y") {         // vertical flip
04409                         array[5] = -1.0;
04410                 }
04411                 else if (axis == "z" || axis == "Z") {          // vertical flip
04412                         array[10] = -1.0;
04413                 }
04414                 Transform t(array);
04415                 Dict params("transform",(Transform*)&t);
04416                 image->process_inplace("xform",params);
04417 
04418                 EXITFUNC;
04419                 return;
04420         }
04421 #endif
04422 
04423 
04424         float *d = image->get_data();
04425         int nx = image->get_xsize();
04426         int ny = image->get_ysize();
04427         int nz = image->get_zsize();
04428 
04429         size_t nxy = nx * ny;
04430 
04431 
04432         // Note in all cases the origin is nx/2, ny/2 and nz/2
04433         // This means when flipping even sized dimensions that some pixels are redundant.
04434         // Here redundant pixels are set to zero, however, should this change to something
04435         // like the mean.
04436         if (axis == "x" || axis == "X") {               // Horizontal flip
04437                 int offset = (nx%2 == 0);
04438                 size_t idx1, idx2;
04439                 for(int z = 0; z < nz; ++z) {
04440                         for(int y = 0; y < ny; ++y) {
04441                                 if (offset != 0 ) {
04442                                         idx1 = z*nxy + y*nx;
04443                                         d[idx1] = 0; // Here's where you'd make it the mean
04444                                 }
04445                                 for(int x = offset; x < nx / 2; ++x) {
04446                                         idx1 = z*nxy + y*nx + x;
04447                                         idx2 = z*nxy + y*nx + (nx-x-1+offset);
04448                                         std::swap(d[idx1], d[idx2]);
04449                                 }
04450 
04451                         }
04452                 }
04453         }
04454 
04455         else if (axis == "y" || axis == "Y") {          // vertical flip
04456                 int offset = (ny%2 == 0);
04457                 for(int z=0; z<nz; ++z) {
04458                         if (offset != 0) {
04459                                 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)
04460                         }
04461                         for(int y=offset; y<ny/2; ++y) {
04462                                 for(int x=0; x<nx; ++x) {
04463                                         std::swap(d[(size_t)z*nxy + y*nx +x], d[(size_t)z*nxy + (ny -y -1+offset)*nx +x]);
04464                                 }
04465                         }
04466                 }
04467         }
04468         else if (axis == "z" || axis == "Z") {          //z axis flip
04469                 int offset = (nz%2 == 0);
04470                 if (offset != 0) {
04471                         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)
04472                 }
04473                 size_t idx1, idx2;
04474                 for(int z=offset; z<nz/2; ++z) {
04475                         for(int y=0; y<ny; ++y) {
04476                                 for(int x=0; x<nx; ++x) {
04477                                         idx1 = (size_t)z*nxy + y*nx + x;
04478                                         idx2 = (size_t)(nz-z-1+offset)*nxy + y*nx + x;
04479                                         std::swap(d[idx1], d[idx2]);
04480                                 }
04481                         }
04482                 }
04483         }
04484 
04485         image->update();
04486         EXITFUNC;
04487 }


Member Data Documentation

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

Definition at line 158 of file processor.cpp.


The documentation for this class was generated from the following files:
Generated on Fri Aug 10 16:37:56 2012 for EMAN2 by  doxygen 1.3.9.1