#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 | |
static Processor * | NEW () |
Static Public Attributes | |
static const string | NAME = "addspectralnoise" |
n | ||
x0 | ||
dx | ||
y | ||
interpolation | ||
seed | seed for random number generator |
Definition at line 4634 of file processor.h.
virtual string EMAN::AddRandomNoiseProcessor::get_desc | ( | ) | const [inline, virtual] |
Get the descrition of this specific processor.
This function must be overwritten by a subclass.
Implements EMAN::Processor.
Definition at line 4661 of file processor.h.
virtual string EMAN::AddRandomNoiseProcessor::get_name | ( | ) | const [inline, virtual] |
Get the processor's name.
Each processor is identified by a unique name.
Implements EMAN::Processor.
Definition at line 4639 of file processor.h.
References NAME.
04640 { 04641 return NAME; 04642 }
virtual TypeDict EMAN::AddRandomNoiseProcessor::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.
Reimplemented from EMAN::Processor.
Definition at line 4649 of file processor.h.
References EMAN::EMObject::FLOAT, EMAN::EMObject::FLOATARRAY, EMAN::EMObject::INT, and EMAN::TypeDict::put().
04650 { 04651 TypeDict d; 04652 d.put("n", EMObject::INT); 04653 d.put("x0", EMObject::FLOAT); 04654 d.put("dx", EMObject::FLOAT); 04655 d.put("y", EMObject::FLOATARRAY); 04656 d.put("interpolation", EMObject::INT); 04657 d.put("seed", EMObject::INT, "seed for random number generator"); 04658 return d; 04659 }
static Processor* EMAN::AddRandomNoiseProcessor::NEW | ( | ) | [inline, static] |
Definition at line 4644 of file processor.h.
04645 { 04646 return new AddRandomNoiseProcessor(); 04647 }
void AddRandomNoiseProcessor::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.
image | The image to be processed. |
Implements EMAN::Processor.
Definition at line 5355 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, EMAN::Processor::params, rdata, EMAN::Randnum::set_seed(), sqrt(), and EMAN::EMData::update().
05356 { 05357 if (!image) { 05358 LOGWARN("NULL Image"); 05359 return; 05360 } 05361 05362 if (!image->is_complex()) { 05363 LOGERR("AddRandomNoise Processor only works for complex image"); 05364 throw ImageFormatException("only work for complex image"); 05365 } 05366 05367 int n = params["n"]; 05368 float x0 = params["x0"]; 05369 float dx = params["dx"]; 05370 vector < float >y = params["y"]; 05371 05372 int interpolation = 1; 05373 if (params.has_key("interpolation")) { 05374 interpolation = params["interpolation"]; 05375 } 05376 05377 Randnum * randnum = Randnum::Instance(); 05378 if(params.has_key("seed")) { 05379 randnum->set_seed((int)params["seed"]); 05380 } 05381 05382 int nx = image->get_xsize(); 05383 int ny = image->get_ysize(); 05384 int nz = image->get_zsize(); 05385 05386 image->ap2ri(); 05387 float *rdata = image->get_data(); 05388 05389 size_t k = 0; 05390 float half_nz = 0; 05391 if (nz > 1) { 05392 half_nz = nz / 2.0f; 05393 } 05394 05395 const float sqrt_2 = sqrt((float) 2); 05396 05397 float r; 05398 for (int h = 0; h < nz; h++) { 05399 for (int j = 0; j < ny; j++) { 05400 for (int i = 0; i < nx; i += 2, k += 2) { 05401 r = (Util::hypot3(i / 2.0f, j - ny / 2.0f, h - half_nz)); 05402 // 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 05403 r = (r - x0) / dx; 05404 int l = 0; 05405 if (interpolation) { 05406 l = Util::fast_floor(r); 05407 } 05408 else { 05409 l = Util::fast_floor(r + 0.5f); 05410 } 05411 r -= l; 05412 float f = 0; 05413 if (l >= n - 2) { 05414 f = y[n - 1]; 05415 } 05416 else if (l < 0) { 05417 l = 0; 05418 } 05419 else { 05420 if (interpolation) { 05421 f = (y[l] * (1 - r) + y[l + 1] * r); 05422 } 05423 else { 05424 f = y[l]; 05425 } 05426 } 05427 f = randnum->get_gauss_rand(sqrt(f), sqrt(f) / 3); 05428 float a = randnum->get_frand(0.0f, (float)(2 * M_PI)); 05429 if (i == 0) { 05430 f *= sqrt_2; 05431 } 05432 rdata[k] += f * cos(a); 05433 rdata[k + 1] += f * sin(a); 05434 } 05435 } 05436 } 05437 05438 image->update(); 05439 }
const string AddRandomNoiseProcessor::NAME = "addspectralnoise" [static] |