#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 | |
Processor * | NEW () |
Static Public Attributes | |
const string | NAME = "testimage.noise.fourier.gaussian" |
sigma | sigma value for this Gaussian blob |
Definition at line 5946 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 5956 of file processor.h. 05957 { 05958 return "Replace a source image with pink Fourier noise, based on a Gaussian. Random phase."; 05959 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 5951 of file processor.h. 05952 {
05953 return NAME;
05954 }
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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 5966 of file processor.h. References EMAN::TypeDict::put(). 05967 { 05968 TypeDict d; 05969 d.put("sigma", EMObject::FLOAT, "sigma value"); 05970 return d; 05971 }
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Definition at line 5961 of file processor.h. 05962 { 05963 return new TestImageFourierNoiseGaussian(); 05964 }
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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 6951 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(), nx, ny, 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(), x, and y. 06952 { 06953 if (!image->is_complex()) { 06954 int nx = image->get_xsize(); 06955 int offset = 2 - nx%2; 06956 06957 image->set_size(nx+offset,image->get_ysize(),image->get_zsize()); 06958 image->set_complex(true); 06959 if (1 == offset) image->set_fftodd(true); 06960 else image->set_fftodd(false); 06961 image->set_fftpad(true); 06962 } 06963 image->ri2ap(); 06964 06965 float sigma = params.set_default("sigma",.25f); 06966 06967 float * d = image->get_data(); 06968 int nx = image->get_xsize(); 06969 int ny = image->get_ysize(); 06970 int nxy = image->get_ysize()*nx; 06971 int nzon2 = image->get_zsize()/2; 06972 int nyon2 = image->get_ysize()/2; 06973 float rx, ry, rz, length, amp, phase; 06974 int twox; 06975 for (int z = 0; z< image->get_zsize(); ++z) { 06976 for (int y = 0; y < image->get_ysize(); ++y) { 06977 for (int x = 0; x < image->get_xsize()/2; ++x) { 06978 rx = (float)x; 06979 ry = (float)nyon2 - (float)y; 06980 rz = (float)nzon2 - (float)z; 06981 length = sqrt(rx*rx + ry*ry + rz*rz); 06982 amp = exp(-sigma*length); 06983 phase = Util::get_frand(0,1)*2*M_PI; 06984 06985 twox = 2*x; 06986 size_t idx1 = twox + y*nx+(size_t)z*nxy; 06987 size_t idx2 = idx1 + 1; 06988 d[idx1] = amp; 06989 d[idx2] = phase; 06990 06991 } 06992 } 06993 } 06994 06995 image->ap2ri(); 06996 if (image->get_ndim() == 2) { 06997 bool yodd = image->get_ysize() % 2 == 1; 06998 06999 int yit = image->get_ysize()/2-1; 07000 int offset = 1; 07001 if (yodd) { 07002 offset = 0; 07003 } 07004 for (int y = 0; y < yit; ++y) { 07005 int bot_idx = (y+offset)*nx; 07006 int top_idx = (ny-1-y)*nx; 07007 float r1 = d[bot_idx]; 07008 float i1 = d[bot_idx+1]; 07009 float r2 = d[top_idx]; 07010 float i2 = d[top_idx+1]; 07011 float r = (r1 + r2)/2.0f; 07012 float i = (i1 + i2)/2.0f; 07013 d[bot_idx] = r; 07014 d[top_idx] = r; 07015 d[bot_idx+1] = i; 07016 d[top_idx+1] = -i; 07017 07018 bot_idx = (y+offset)*nx+nx-2; 07019 top_idx = (ny-1-y)*nx+nx-2; 07020 r1 = d[bot_idx]; 07021 i1 = d[bot_idx+1]; 07022 r2 = d[top_idx]; 07023 i2 = d[top_idx+1]; 07024 r = (r1 + r2)/2.0f; 07025 i = (i1 + i2)/2.0f; 07026 d[bot_idx] = r; 07027 d[top_idx] = r; 07028 d[bot_idx+1] = i; 07029 d[top_idx+1] = -i; 07030 } 07031 07032 d[1] = 0; // 0 phase for this componenet 07033 d[nx-1] = 0; // 0 phase for this component 07034 d[ny/2*nx+nx-1] = 0;// 0 phase for this component 07035 d[ny/2*nx+1] = 0;// 0 phase for this component 07036 } 07037 07038 if (image->get_ndim() != 1) image->process_inplace("xform.fourierorigin.tocorner"); 07039 image->do_ift_inplace(); 07040 image->depad(); 07041 }
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Definition at line 192 of file processor.cpp. |