#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 = "math.addspectralnoise" |
n | ||
x0 | ||
dx | ||
y | ||
interpolation | ||
seed | seed for random number generator |
Definition at line 4713 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 4740 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 4718 of file processor.h.
References NAME.
04719 { 04720 return NAME; 04721 }
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 4728 of file processor.h.
References EMAN::EMObject::FLOAT, EMAN::EMObject::FLOATARRAY, EMAN::EMObject::INT, and EMAN::TypeDict::put().
04729 { 04730 TypeDict d; 04731 d.put("n", EMObject::INT); 04732 d.put("x0", EMObject::FLOAT); 04733 d.put("dx", EMObject::FLOAT); 04734 d.put("y", EMObject::FLOATARRAY); 04735 d.put("interpolation", EMObject::INT); 04736 d.put("seed", EMObject::INT, "seed for random number generator"); 04737 return d; 04738 }
static Processor* EMAN::AddRandomNoiseProcessor::NEW | ( | ) | [inline, static] |
Definition at line 4723 of file processor.h.
04724 { 04725 return new AddRandomNoiseProcessor(); 04726 }
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 5571 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().
05572 { 05573 if (!image) { 05574 LOGWARN("NULL Image"); 05575 return; 05576 } 05577 05578 if (!image->is_complex()) { 05579 LOGERR("AddRandomNoise Processor only works for complex image"); 05580 throw ImageFormatException("only work for complex image"); 05581 } 05582 05583 int n = params["n"]; 05584 float x0 = params["x0"]; 05585 float dx = params["dx"]; 05586 vector < float >y = params["y"]; 05587 05588 int interpolation = 1; 05589 if (params.has_key("interpolation")) { 05590 interpolation = params["interpolation"]; 05591 } 05592 05593 Randnum * randnum = Randnum::Instance(); 05594 if(params.has_key("seed")) { 05595 randnum->set_seed((int)params["seed"]); 05596 } 05597 05598 int nx = image->get_xsize(); 05599 int ny = image->get_ysize(); 05600 int nz = image->get_zsize(); 05601 05602 image->ap2ri(); 05603 float *rdata = image->get_data(); 05604 05605 size_t k = 0; 05606 float half_nz = 0; 05607 if (nz > 1) { 05608 half_nz = nz / 2.0f; 05609 } 05610 05611 const float sqrt_2 = sqrt((float) 2); 05612 05613 float r; 05614 for (int h = 0; h < nz; h++) { 05615 for (int j = 0; j < ny; j++) { 05616 for (int i = 0; i < nx; i += 2, k += 2) { 05617 r = (Util::hypot3(i / 2.0f, j - ny / 2.0f, h - half_nz)); 05618 // 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 05619 r = (r - x0) / dx; 05620 int l = 0; 05621 if (interpolation) { 05622 l = Util::fast_floor(r); 05623 } 05624 else { 05625 l = Util::fast_floor(r + 0.5f); 05626 } 05627 r -= l; 05628 float f = 0; 05629 if (l >= n - 2) { 05630 f = y[n - 1]; 05631 } 05632 else if (l < 0) { 05633 l = 0; 05634 } 05635 else { 05636 if (interpolation) { 05637 f = (y[l] * (1 - r) + y[l + 1] * r); 05638 } 05639 else { 05640 f = y[l]; 05641 } 05642 } 05643 f = randnum->get_gauss_rand(sqrt(f), sqrt(f) / 3); 05644 float a = randnum->get_frand(0.0f, (float)(2 * M_PI)); 05645 if (i == 0) { 05646 f *= sqrt_2; 05647 } 05648 rdata[k] += f * cos(a); 05649 rdata[k + 1] += f * sin(a); 05650 } 05651 } 05652 } 05653 05654 image->update(); 05655 }
const string AddRandomNoiseProcessor::NAME = "math.addspectralnoise" [static] |