#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 5863 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 5873 of file processor.h.
05874 { 05875 return "Replace a source image with pink Fourier noise, based on a Gaussian. Random phase."; 05876 }
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 5868 of file processor.h.
References NAME.
05869 { 05870 return NAME; 05871 }
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 5883 of file processor.h.
References EMAN::EMObject::FLOAT, and EMAN::TypeDict::put().
05884 { 05885 TypeDict d; 05886 d.put("sigma", EMObject::FLOAT, "sigma value"); 05887 return d; 05888 }
static Processor* EMAN::TestImageFourierNoiseGaussian::NEW | ( | ) | [inline, static] |
Definition at line 5878 of file processor.h.
05879 { 05880 return new TestImageFourierNoiseGaussian(); 05881 }
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 6721 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.
06722 { 06723 if (!image->is_complex()) { 06724 int nx = image->get_xsize(); 06725 int offset = 2 - nx%2; 06726 06727 image->set_size(nx+offset,image->get_ysize(),image->get_zsize()); 06728 image->set_complex(true); 06729 if (1 == offset) image->set_fftodd(true); 06730 else image->set_fftodd(false); 06731 image->set_fftpad(true); 06732 } 06733 image->ri2ap(); 06734 06735 float sigma = params.set_default("sigma",.25f); 06736 06737 float * d = image->get_data(); 06738 int nx = image->get_xsize(); 06739 int ny = image->get_ysize(); 06740 int nxy = image->get_ysize()*nx; 06741 int nzon2 = image->get_zsize()/2; 06742 int nyon2 = image->get_ysize()/2; 06743 float rx, ry, rz, length, amp, phase; 06744 int twox; 06745 for (int z = 0; z< image->get_zsize(); ++z) { 06746 for (int y = 0; y < image->get_ysize(); ++y) { 06747 for (int x = 0; x < image->get_xsize()/2; ++x) { 06748 rx = (float)x; 06749 ry = (float)nyon2 - (float)y; 06750 rz = (float)nzon2 - (float)z; 06751 length = sqrt(rx*rx + ry*ry + rz*rz); 06752 amp = exp(-sigma*length); 06753 phase = Util::get_frand(0,1)*2*M_PI; 06754 06755 twox = 2*x; 06756 size_t idx1 = twox + y*nx+z*nxy; 06757 size_t idx2 = idx1 + 1; 06758 d[idx1] = amp; 06759 d[idx2] = phase; 06760 06761 } 06762 } 06763 } 06764 06765 image->ap2ri(); 06766 if (image->get_ndim() == 2) { 06767 bool yodd = image->get_ysize() % 2 == 1; 06768 06769 int yit = image->get_ysize()/2-1; 06770 int offset = 1; 06771 if (yodd) { 06772 offset = 0; 06773 } 06774 for (int y = 0; y < yit; ++y) { 06775 int bot_idx = (y+offset)*nx; 06776 int top_idx = (ny-1-y)*nx; 06777 float r1 = d[bot_idx]; 06778 float i1 = d[bot_idx+1]; 06779 float r2 = d[top_idx]; 06780 float i2 = d[top_idx+1]; 06781 float r = (r1 + r2)/2.0f; 06782 float i = (i1 + i2)/2.0f; 06783 d[bot_idx] = r; 06784 d[top_idx] = r; 06785 d[bot_idx+1] = i; 06786 d[top_idx+1] = -i; 06787 06788 bot_idx = (y+offset)*nx+nx-2; 06789 top_idx = (ny-1-y)*nx+nx-2; 06790 r1 = d[bot_idx]; 06791 i1 = d[bot_idx+1]; 06792 r2 = d[top_idx]; 06793 i2 = d[top_idx+1]; 06794 r = (r1 + r2)/2.0f; 06795 i = (i1 + i2)/2.0f; 06796 d[bot_idx] = r; 06797 d[top_idx] = r; 06798 d[bot_idx+1] = i; 06799 d[top_idx+1] = -i; 06800 } 06801 06802 d[1] = 0; // 0 phase for this componenet 06803 d[nx-1] = 0; // 0 phase for this component 06804 d[ny/2*nx+nx-1] = 0;// 0 phase for this component 06805 d[ny/2*nx+1] = 0;// 0 phase for this component 06806 } 06807 06808 if (image->get_ndim() != 1) image->process_inplace("xform.fourierorigin.tocorner"); 06809 image->do_ift_inplace(); 06810 image->depad(); 06811 }
const string TestImageFourierNoiseGaussian::NAME = "testimage.noise.fourier.gaussian" [static] |