#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 5823 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 5833 of file processor.h. 05834 { 05835 return "Replace a source image with pink Fourier noise, based on a Gaussian. Random phase."; 05836 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 5828 of file processor.h. References NAME. 05829 { 05830 return NAME; 05831 }
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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 5843 of file processor.h. References EMAN::EMObject::FLOAT, and EMAN::TypeDict::put(). 05844 { 05845 TypeDict d; 05846 d.put("sigma", EMObject::FLOAT, "sigma value"); 05847 return d; 05848 }
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Definition at line 5838 of file processor.h. 05839 { 05840 return new TestImageFourierNoiseGaussian(); 05841 }
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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 6614 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(), get_xsize(), EMAN::EMData::get_xsize(), get_ysize(), EMAN::EMData::get_ysize(), get_zsize(), 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. 06615 { 06616 if (!image->is_complex()) { 06617 int nx = image->get_xsize(); 06618 int offset = 2 - nx%2; 06619 06620 image->set_size(nx+offset,image->get_ysize(),image->get_zsize()); 06621 image->set_complex(true); 06622 if (1 == offset) image->set_fftodd(true); 06623 else image->set_fftodd(false); 06624 image->set_fftpad(true); 06625 } 06626 image->ri2ap(); 06627 06628 float sigma = params.set_default("sigma",.25f); 06629 06630 float * d = image->get_data(); 06631 int nx = image->get_xsize(); 06632 int ny = image->get_ysize(); 06633 int nxy = image->get_ysize()*nx; 06634 int nzon2 = image->get_zsize()/2; 06635 int nyon2 = image->get_ysize()/2; 06636 float rx, ry, rz, length, amp, phase; 06637 int twox; 06638 for (int z = 0; z< image->get_zsize(); ++z) { 06639 for (int y = 0; y < image->get_ysize(); ++y) { 06640 for (int x = 0; x < image->get_xsize()/2; ++x) { 06641 rx = (float)x; 06642 ry = (float)nyon2 - (float)y; 06643 rz = (float)nzon2 - (float)z; 06644 length = sqrt(rx*rx + ry*ry + rz*rz); 06645 amp = exp(-sigma*length); 06646 phase = Util::get_frand(0,1)*2*M_PI; 06647 06648 twox = 2*x; 06649 size_t idx1 = twox + y*nx+z*nxy; 06650 size_t idx2 = idx1 + 1; 06651 d[idx1] = amp; 06652 d[idx2] = phase; 06653 06654 } 06655 } 06656 } 06657 06658 image->ap2ri(); 06659 if (image->get_ndim() == 2) { 06660 bool yodd = image->get_ysize() % 2 == 1; 06661 06662 int yit = image->get_ysize()/2-1; 06663 int offset = 1; 06664 if (yodd) { 06665 offset = 0; 06666 } 06667 for (int y = 0; y < yit; ++y) { 06668 int bot_idx = (y+offset)*nx; 06669 int top_idx = (ny-1-y)*nx; 06670 float r1 = d[bot_idx]; 06671 float i1 = d[bot_idx+1]; 06672 float r2 = d[top_idx]; 06673 float i2 = d[top_idx+1]; 06674 float r = (r1 + r2)/2.0f; 06675 float i = (i1 + i2)/2.0f; 06676 d[bot_idx] = r; 06677 d[top_idx] = r; 06678 d[bot_idx+1] = i; 06679 d[top_idx+1] = -i; 06680 06681 bot_idx = (y+offset)*nx+nx-2; 06682 top_idx = (ny-1-y)*nx+nx-2; 06683 r1 = d[bot_idx]; 06684 i1 = d[bot_idx+1]; 06685 r2 = d[top_idx]; 06686 i2 = d[top_idx+1]; 06687 r = (r1 + r2)/2.0f; 06688 i = (i1 + i2)/2.0f; 06689 d[bot_idx] = r; 06690 d[top_idx] = r; 06691 d[bot_idx+1] = i; 06692 d[top_idx+1] = -i; 06693 } 06694 06695 d[1] = 0; // 0 phase for this componenet 06696 d[nx-1] = 0; // 0 phase for this component 06697 d[ny/2*nx+nx-1] = 0;// 0 phase for this component 06698 d[ny/2*nx+1] = 0;// 0 phase for this component 06699 } 06700 06701 if (image->get_ndim() != 1) image->process_inplace("xform.fourierorigin.tocorner"); 06702 image->do_ift_inplace(); 06703 image->depad(); 06704 }
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Definition at line 5850 of file processor.h. Referenced by get_name(). |