#include <processor.h>
Inheritance diagram for EMAN::WaveletProcessor:
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 | |
Processor * | NEW () |
Static Public Attributes | |
const string | NAME = "basis.wavelet" |
type | "daub", "harr", or "bspl" | |
dir | 1 for forward transform, -1 for inverse transform | |
ord | for Daubechies (4,6,8,...,20), for Harr (2), for B-Splines (103, 105, 202, 204, 206, 208, 301, 303, 305 307, 309) |
Definition at line 6719 of file processor.h.
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Get the descrition of this specific processor. This function must be overwritten by a subclass.
Implements EMAN::Processor. Definition at line 6743 of file processor.h. 06744 { 06745 return "Computes the DWT (discrete wavelet transform) of an image in one of 3 possible bases"; 06746 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 6724 of file processor.h. Referenced by process_inplace(). 06725 {
06726 return NAME;
06727 }
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Get processor parameter information in a dictionary. Each parameter has one record in the dictionary. Each record contains its name, data-type, and description.
Reimplemented from EMAN::Processor. Definition at line 6734 of file processor.h. References EMAN::TypeDict::put(). 06735 { 06736 TypeDict d; 06737 d.put("type", EMObject::STRING, "'daub', 'harr' or 'bspl'"); 06738 d.put("dir", EMObject::INT, "1 for forward transform, -1 for inverse transform"); 06739 d.put("ord", EMObject::INT, "Daubechies (4,6,8,...,20), for Harr (2), for B-Splines (103, 105, 202, 204, 206, 208, 301, 303, 305 307, 309)"); 06740 return d; 06741 }
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Definition at line 6729 of file processor.h. 06730 { 06731 return new WaveletProcessor(); 06732 }
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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.
Implements EMAN::Processor. Definition at line 8271 of file processor.cpp. References get_name(), EMAN::EMData::get_value_at(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), ImageDimensionException, InvalidStringException, EMAN::Util::IsPower2(), LOGERR, nx, ny, and EMAN::EMData::set_value_at_fast(). 08272 { 08273 if (image->get_zsize() != 1) { 08274 LOGERR("%s Processor doesn't support 3D", get_name().c_str()); 08275 throw ImageDimensionException("3D model not supported"); 08276 } 08277 08278 int i,nx,ny; 08279 const gsl_wavelet_type * T; 08280 nx=image->get_xsize(); 08281 ny=image->get_ysize(); 08282 08283 if (nx != ny && ny!=1) throw ImageDimensionException("Wavelet transform only supports square images"); 08284 // float l=log((float)nx)/log(2.0f); 08285 // if (l!=floor(l)) throw ImageDimensionException("Wavelet transform size must be power of 2"); 08286 if( !Util::IsPower2(nx) ) throw ImageDimensionException("Wavelet transform size must be power of 2"); 08287 08288 // Unfortunately GSL works only on double() arrays 08289 // eventually we should put our own wavelet code in here 08290 // but this will work for now 08291 double *cpy = (double *)malloc(nx*ny*sizeof(double)); 08292 08293 for (i=0; i<nx*ny; i++) cpy[i]=image->get_value_at(i,0,0); 08294 08295 string tp = (const char*)params["type"]; 08296 if (tp=="daub") T=gsl_wavelet_daubechies; 08297 else if (tp=="harr") T=gsl_wavelet_haar; 08298 else if (tp=="bspl") T=gsl_wavelet_bspline; 08299 else throw InvalidStringException(tp,"Invalid wavelet name, 'daub', 'harr' or 'bspl'"); 08300 08301 int K=(int)params["ord"]; 08302 gsl_wavelet_direction dir; 08303 if ((int)params["dir"]==1) dir=forward; 08304 else dir=backward; 08305 08306 gsl_wavelet *w = gsl_wavelet_alloc(T, K); 08307 gsl_wavelet_workspace *work = gsl_wavelet_workspace_alloc(nx); 08308 08309 if (ny==1) gsl_wavelet_transform (w,cpy, 1, nx, dir, work); 08310 else gsl_wavelet2d_transform (w, cpy, nx,nx,ny, dir, work); 08311 08312 gsl_wavelet_workspace_free (work); 08313 gsl_wavelet_free (w); 08314 08315 for (i=0; i<nx*ny; i++) image->set_value_at_fast(i,0,0,static_cast<float>(cpy[i])); 08316 08317 free(cpy); 08318 }
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Definition at line 212 of file processor.cpp. |