#include <processor.h>
Inheritance diagram for EMAN::TestImageFourierNoiseGaussian:
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 string | get_desc () const |
Get the descrition of this specific processor. | |
virtual TypeDict | get_param_types () const |
Get processor parameter information in a dictionary. | |
Static Public Member Functions | |
static Processor * | NEW () |
Static Public Attributes | |
static const string | NAME = "testimage.noise.fourier.gaussian" |
sigma | sigma value for this Gaussian blob |
Definition at line 5735 of file processor.h.
virtual string EMAN::TestImageFourierNoiseGaussian::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 5745 of file processor.h.
05746 { 05747 return "Replace a source image with pink Fourier noise, based on a Gaussian. Random phase."; 05748 }
virtual string EMAN::TestImageFourierNoiseGaussian::get_name | ( | ) | const [inline, virtual] |
Get the processor's name.
Each processor is identified by a unique name.
Implements EMAN::Processor.
Definition at line 5740 of file processor.h.
References NAME.
05741 { 05742 return NAME; 05743 }
virtual TypeDict EMAN::TestImageFourierNoiseGaussian::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 5755 of file processor.h.
References EMAN::EMObject::FLOAT, and EMAN::TypeDict::put().
05756 { 05757 TypeDict d; 05758 d.put("sigma", EMObject::FLOAT, "sigma value"); 05759 return d; 05760 }
static Processor* EMAN::TestImageFourierNoiseGaussian::NEW | ( | ) | [inline, static] |
Definition at line 5750 of file processor.h.
05751 { 05752 return new TestImageFourierNoiseGaussian(); 05753 }
void TestImageFourierNoiseGaussian::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 6683 of file processor.cpp.
References EMAN::EMData::ap2ri(), EMAN::EMData::depad(), EMAN::EMData::do_ift_inplace(), EMAN::EMData::get_data(), EMAN::Util::get_frand(), EMAN::EMData::get_ndim(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), EMAN::EMData::is_complex(), EMAN::length(), EMAN::Processor::params, phase(), EMAN::EMData::process_inplace(), EMAN::EMData::ri2ap(), EMAN::EMData::set_complex(), EMAN::Dict::set_default(), EMAN::EMData::set_fftodd(), EMAN::EMData::set_fftpad(), EMAN::EMData::set_size(), sqrt(), and x.
06684 { 06685 if (!image->is_complex()) { 06686 int nx = image->get_xsize(); 06687 int offset = 2 - nx%2; 06688 06689 image->set_size(nx+offset,image->get_ysize(),image->get_zsize()); 06690 image->set_complex(true); 06691 if (1 == offset) image->set_fftodd(true); 06692 else image->set_fftodd(false); 06693 image->set_fftpad(true); 06694 } 06695 image->ri2ap(); 06696 06697 float sigma = params.set_default("sigma",.25f); 06698 06699 float * d = image->get_data(); 06700 int nx = image->get_xsize(); 06701 int ny = image->get_ysize(); 06702 int nxy = image->get_ysize()*nx; 06703 int nzon2 = image->get_zsize()/2; 06704 int nyon2 = image->get_ysize()/2; 06705 float rx, ry, rz, length, amp, phase; 06706 int twox; 06707 for (int z = 0; z< image->get_zsize(); ++z) { 06708 for (int y = 0; y < image->get_ysize(); ++y) { 06709 for (int x = 0; x < image->get_xsize()/2; ++x) { 06710 rx = (float)x; 06711 ry = (float)nyon2 - (float)y; 06712 rz = (float)nzon2 - (float)z; 06713 length = sqrt(rx*rx + ry*ry + rz*rz); 06714 amp = exp(-sigma*length); 06715 phase = Util::get_frand(0,1)*2*M_PI; 06716 06717 twox = 2*x; 06718 size_t idx1 = twox + y*nx+(size_t)z*nxy; 06719 size_t idx2 = idx1 + 1; 06720 d[idx1] = amp; 06721 d[idx2] = phase; 06722 06723 } 06724 } 06725 } 06726 06727 image->ap2ri(); 06728 if (image->get_ndim() == 2) { 06729 bool yodd = image->get_ysize() % 2 == 1; 06730 06731 int yit = image->get_ysize()/2-1; 06732 int offset = 1; 06733 if (yodd) { 06734 offset = 0; 06735 } 06736 for (int y = 0; y < yit; ++y) { 06737 int bot_idx = (y+offset)*nx; 06738 int top_idx = (ny-1-y)*nx; 06739 float r1 = d[bot_idx]; 06740 float i1 = d[bot_idx+1]; 06741 float r2 = d[top_idx]; 06742 float i2 = d[top_idx+1]; 06743 float r = (r1 + r2)/2.0f; 06744 float i = (i1 + i2)/2.0f; 06745 d[bot_idx] = r; 06746 d[top_idx] = r; 06747 d[bot_idx+1] = i; 06748 d[top_idx+1] = -i; 06749 06750 bot_idx = (y+offset)*nx+nx-2; 06751 top_idx = (ny-1-y)*nx+nx-2; 06752 r1 = d[bot_idx]; 06753 i1 = d[bot_idx+1]; 06754 r2 = d[top_idx]; 06755 i2 = d[top_idx+1]; 06756 r = (r1 + r2)/2.0f; 06757 i = (i1 + i2)/2.0f; 06758 d[bot_idx] = r; 06759 d[top_idx] = r; 06760 d[bot_idx+1] = i; 06761 d[top_idx+1] = -i; 06762 } 06763 06764 d[1] = 0; // 0 phase for this componenet 06765 d[nx-1] = 0; // 0 phase for this component 06766 d[ny/2*nx+nx-1] = 0;// 0 phase for this component 06767 d[ny/2*nx+1] = 0;// 0 phase for this component 06768 } 06769 06770 if (image->get_ndim() != 1) image->process_inplace("xform.fourierorigin.tocorner"); 06771 image->do_ift_inplace(); 06772 image->depad(); 06773 }
const string TestImageFourierNoiseGaussian::NAME = "testimage.noise.fourier.gaussian" [static] |