#include <processor.h>
Inheritance diagram for EMAN::AddRandomNoiseProcessor:
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 = "addspectralnoise" |
n | ||
x0 | ||
dx | ||
y | ||
interpolation | ||
seed | seed for random number generator |
Definition at line 4633 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 4660 of file processor.h. 04661 { 04662 return "add spectral noise to a complex image."; 04663 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 4638 of file processor.h. 04639 {
04640 return NAME;
04641 }
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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 4648 of file processor.h. References EMAN::TypeDict::put(). 04649 { 04650 TypeDict d; 04651 d.put("n", EMObject::INT); 04652 d.put("x0", EMObject::FLOAT); 04653 d.put("dx", EMObject::FLOAT); 04654 d.put("y", EMObject::FLOATARRAY); 04655 d.put("interpolation", EMObject::INT); 04656 d.put("seed", EMObject::INT, "seed for random number generator"); 04657 return d; 04658 }
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Definition at line 4643 of file processor.h. 04644 { 04645 return new AddRandomNoiseProcessor(); 04646 }
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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 5324 of file processor.cpp. References EMAN::EMData::ap2ri(), EMAN::Util::fast_floor(), EMAN::EMData::get_data(), EMAN::Randnum::get_frand(), EMAN::Randnum::get_gauss_rand(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), EMAN::Dict::has_key(), EMAN::Util::hypot3(), ImageFormatException, EMAN::Randnum::Instance(), EMAN::EMData::is_complex(), LOGERR, LOGWARN, nx, ny, rdata, EMAN::Randnum::set_seed(), sqrt(), EMAN::EMData::update(), and y. 05325 { 05326 if (!image) { 05327 LOGWARN("NULL Image"); 05328 return; 05329 } 05330 05331 if (!image->is_complex()) { 05332 LOGERR("AddRandomNoise Processor only works for complex image"); 05333 throw ImageFormatException("only work for complex image"); 05334 } 05335 05336 int n = params["n"]; 05337 float x0 = params["x0"]; 05338 float dx = params["dx"]; 05339 vector < float >y = params["y"]; 05340 05341 int interpolation = 1; 05342 if (params.has_key("interpolation")) { 05343 interpolation = params["interpolation"]; 05344 } 05345 05346 Randnum * randnum = Randnum::Instance(); 05347 if(params.has_key("seed")) { 05348 randnum->set_seed((int)params["seed"]); 05349 } 05350 05351 int nx = image->get_xsize(); 05352 int ny = image->get_ysize(); 05353 int nz = image->get_zsize(); 05354 05355 image->ap2ri(); 05356 float *rdata = image->get_data(); 05357 05358 size_t k = 0; 05359 float half_nz = 0; 05360 if (nz > 1) { 05361 half_nz = nz / 2.0f; 05362 } 05363 05364 const float sqrt_2 = sqrt((float) 2); 05365 05366 float r; 05367 for (int h = 0; h < nz; h++) { 05368 for (int j = 0; j < ny; j++) { 05369 for (int i = 0; i < nx; i += 2, k += 2) { 05370 r = (Util::hypot3(i / 2.0f, j - ny / 2.0f, h - half_nz)); 05371 // r = sqrt(Util::hypot3(i / 2.0f, j - ny / 2.0f, h - half_nz)); // I don't think this sqrt was supposed to be here --steve 05372 r = (r - x0) / dx; 05373 int l = 0; 05374 if (interpolation) { 05375 l = Util::fast_floor(r); 05376 } 05377 else { 05378 l = Util::fast_floor(r + 0.5f); 05379 } 05380 r -= l; 05381 float f = 0; 05382 if (l >= n - 2) { 05383 f = y[n - 1]; 05384 } 05385 else if (l < 0) { 05386 l = 0; 05387 } 05388 else { 05389 if (interpolation) { 05390 f = (y[l] * (1 - r) + y[l + 1] * r); 05391 } 05392 else { 05393 f = y[l]; 05394 } 05395 } 05396 f = randnum->get_gauss_rand(sqrt(f), sqrt(f) / 3); 05397 float a = randnum->get_frand(0.0f, (float)(2 * M_PI)); 05398 if (i == 0) { 05399 f *= sqrt_2; 05400 } 05401 rdata[k] += f * cos(a); 05402 rdata[k + 1] += f * sin(a); 05403 } 05404 } 05405 } 05406 05407 image->update(); 05408 }
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Definition at line 160 of file processor.cpp. |