#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 4674 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 4701 of file processor.h.
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 4679 of file processor.h. References NAME. 04680 { 04681 return NAME; 04682 }
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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 4689 of file processor.h. References EMAN::EMObject::FLOAT, EMAN::EMObject::FLOATARRAY, EMAN::EMObject::INT, and EMAN::TypeDict::put(). 04690 { 04691 TypeDict d; 04692 d.put("n", EMObject::INT); 04693 d.put("x0", EMObject::FLOAT); 04694 d.put("dx", EMObject::FLOAT); 04695 d.put("y", EMObject::FLOATARRAY); 04696 d.put("interpolation", EMObject::INT); 04697 d.put("seed", EMObject::INT, "seed for random number generator"); 04698 return d; 04699 }
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Definition at line 4684 of file processor.h. 04685 { 04686 return new AddRandomNoiseProcessor(); 04687 }
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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 5462 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(). 05463 { 05464 if (!image) { 05465 LOGWARN("NULL Image"); 05466 return; 05467 } 05468 05469 if (!image->is_complex()) { 05470 LOGERR("AddRandomNoise Processor only works for complex image"); 05471 throw ImageFormatException("only work for complex image"); 05472 } 05473 05474 int n = params["n"]; 05475 float x0 = params["x0"]; 05476 float dx = params["dx"]; 05477 vector < float >y = params["y"]; 05478 05479 int interpolation = 1; 05480 if (params.has_key("interpolation")) { 05481 interpolation = params["interpolation"]; 05482 } 05483 05484 Randnum * randnum = Randnum::Instance(); 05485 if(params.has_key("seed")) { 05486 randnum->set_seed((int)params["seed"]); 05487 } 05488 05489 int nx = image->get_xsize(); 05490 int ny = image->get_ysize(); 05491 int nz = image->get_zsize(); 05492 05493 image->ap2ri(); 05494 float *rdata = image->get_data(); 05495 05496 size_t k = 0; 05497 float half_nz = 0; 05498 if (nz > 1) { 05499 half_nz = nz / 2.0f; 05500 } 05501 05502 const float sqrt_2 = sqrt((float) 2); 05503 05504 float r; 05505 for (int h = 0; h < nz; h++) { 05506 for (int j = 0; j < ny; j++) { 05507 for (int i = 0; i < nx; i += 2, k += 2) { 05508 r = (Util::hypot3(i / 2.0f, j - ny / 2.0f, h - half_nz)); 05509 // 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 05510 r = (r - x0) / dx; 05511 int l = 0; 05512 if (interpolation) { 05513 l = Util::fast_floor(r); 05514 } 05515 else { 05516 l = Util::fast_floor(r + 0.5f); 05517 } 05518 r -= l; 05519 float f = 0; 05520 if (l >= n - 2) { 05521 f = y[n - 1]; 05522 } 05523 else if (l < 0) { 05524 l = 0; 05525 } 05526 else { 05527 if (interpolation) { 05528 f = (y[l] * (1 - r) + y[l + 1] * r); 05529 } 05530 else { 05531 f = y[l]; 05532 } 05533 } 05534 f = randnum->get_gauss_rand(sqrt(f), sqrt(f) / 3); 05535 float a = randnum->get_frand(0.0f, (float)(2 * M_PI)); 05536 if (i == 0) { 05537 f *= sqrt_2; 05538 } 05539 rdata[k] += f * cos(a); 05540 rdata[k + 1] += f * sin(a); 05541 } 05542 } 05543 } 05544 05545 image->update(); 05546 }
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Definition at line 4706 of file processor.h. Referenced by get_name(). |