#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 4599 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 4626 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 4604 of file processor.h.
References NAME.
04605 { 04606 return NAME; 04607 }
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 4614 of file processor.h.
References EMAN::EMObject::FLOAT, EMAN::EMObject::FLOATARRAY, EMAN::EMObject::INT, and EMAN::TypeDict::put().
04615 { 04616 TypeDict d; 04617 d.put("n", EMObject::INT); 04618 d.put("x0", EMObject::FLOAT); 04619 d.put("dx", EMObject::FLOAT); 04620 d.put("y", EMObject::FLOATARRAY); 04621 d.put("interpolation", EMObject::INT); 04622 d.put("seed", EMObject::INT, "seed for random number generator"); 04623 return d; 04624 }
static Processor* EMAN::AddRandomNoiseProcessor::NEW | ( | ) | [inline, static] |
Definition at line 4609 of file processor.h.
04610 { 04611 return new AddRandomNoiseProcessor(); 04612 }
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 5385 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().
05386 { 05387 if (!image) { 05388 LOGWARN("NULL Image"); 05389 return; 05390 } 05391 05392 if (!image->is_complex()) { 05393 LOGERR("AddRandomNoise Processor only works for complex image"); 05394 throw ImageFormatException("only work for complex image"); 05395 } 05396 05397 int n = params["n"]; 05398 float x0 = params["x0"]; 05399 float dx = params["dx"]; 05400 vector < float >y = params["y"]; 05401 05402 int interpolation = 1; 05403 if (params.has_key("interpolation")) { 05404 interpolation = params["interpolation"]; 05405 } 05406 05407 Randnum * randnum = Randnum::Instance(); 05408 if(params.has_key("seed")) { 05409 randnum->set_seed((int)params["seed"]); 05410 } 05411 05412 int nx = image->get_xsize(); 05413 int ny = image->get_ysize(); 05414 int nz = image->get_zsize(); 05415 05416 image->ap2ri(); 05417 float *rdata = image->get_data(); 05418 05419 size_t k = 0; 05420 float half_nz = 0; 05421 if (nz > 1) { 05422 half_nz = nz / 2.0f; 05423 } 05424 05425 const float sqrt_2 = sqrt((float) 2); 05426 05427 float r; 05428 for (int h = 0; h < nz; h++) { 05429 for (int j = 0; j < ny; j++) { 05430 for (int i = 0; i < nx; i += 2, k += 2) { 05431 r = (Util::hypot3(i / 2.0f, j - ny / 2.0f, h - half_nz)); 05432 // 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 05433 r = (r - x0) / dx; 05434 int l = 0; 05435 if (interpolation) { 05436 l = Util::fast_floor(r); 05437 } 05438 else { 05439 l = Util::fast_floor(r + 0.5f); 05440 } 05441 r -= l; 05442 float f = 0; 05443 if (l >= n - 2) { 05444 f = y[n - 1]; 05445 } 05446 else if (l < 0) { 05447 l = 0; 05448 } 05449 else { 05450 if (interpolation) { 05451 f = (y[l] * (1 - r) + y[l + 1] * r); 05452 } 05453 else { 05454 f = y[l]; 05455 } 05456 } 05457 f = randnum->get_gauss_rand(sqrt(f), sqrt(f) / 3); 05458 float a = randnum->get_frand(0.0f, (float)(2 * M_PI)); 05459 if (i == 0) { 05460 f *= sqrt_2; 05461 } 05462 rdata[k] += f * cos(a); 05463 rdata[k + 1] += f * sin(a); 05464 } 05465 } 05466 } 05467 05468 image->update(); 05469 }
const string AddRandomNoiseProcessor::NAME = "addspectralnoise" [static] |