#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 5829 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 5839 of file processor.h. 05840 { 05841 return "Replace a source image with pink Fourier noise, based on a Gaussian. Random phase."; 05842 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 5834 of file processor.h. 05835 {
05836 return NAME;
05837 }
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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 5849 of file processor.h. References EMAN::TypeDict::put(). 05850 { 05851 TypeDict d; 05852 d.put("sigma", EMObject::FLOAT, "sigma value"); 05853 return d; 05854 }
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Definition at line 5844 of file processor.h. 05845 { 05846 return new TestImageFourierNoiseGaussian(); 05847 }
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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 6713 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. 06714 { 06715 if (!image->is_complex()) { 06716 int nx = image->get_xsize(); 06717 int offset = 2 - nx%2; 06718 06719 image->set_size(nx+offset,image->get_ysize(),image->get_zsize()); 06720 image->set_complex(true); 06721 if (1 == offset) image->set_fftodd(true); 06722 else image->set_fftodd(false); 06723 image->set_fftpad(true); 06724 } 06725 image->ri2ap(); 06726 06727 float sigma = params.set_default("sigma",.25f); 06728 06729 float * d = image->get_data(); 06730 int nx = image->get_xsize(); 06731 int ny = image->get_ysize(); 06732 int nxy = image->get_ysize()*nx; 06733 int nzon2 = image->get_zsize()/2; 06734 int nyon2 = image->get_ysize()/2; 06735 float rx, ry, rz, length, amp, phase; 06736 int twox; 06737 for (int z = 0; z< image->get_zsize(); ++z) { 06738 for (int y = 0; y < image->get_ysize(); ++y) { 06739 for (int x = 0; x < image->get_xsize()/2; ++x) { 06740 rx = (float)x; 06741 ry = (float)nyon2 - (float)y; 06742 rz = (float)nzon2 - (float)z; 06743 length = sqrt(rx*rx + ry*ry + rz*rz); 06744 amp = exp(-sigma*length); 06745 phase = Util::get_frand(0,1)*2*M_PI; 06746 06747 twox = 2*x; 06748 size_t idx1 = twox + y*nx+(size_t)z*nxy; 06749 size_t idx2 = idx1 + 1; 06750 d[idx1] = amp; 06751 d[idx2] = phase; 06752 06753 } 06754 } 06755 } 06756 06757 image->ap2ri(); 06758 if (image->get_ndim() == 2) { 06759 bool yodd = image->get_ysize() % 2 == 1; 06760 06761 int yit = image->get_ysize()/2-1; 06762 int offset = 1; 06763 if (yodd) { 06764 offset = 0; 06765 } 06766 for (int y = 0; y < yit; ++y) { 06767 int bot_idx = (y+offset)*nx; 06768 int top_idx = (ny-1-y)*nx; 06769 float r1 = d[bot_idx]; 06770 float i1 = d[bot_idx+1]; 06771 float r2 = d[top_idx]; 06772 float i2 = d[top_idx+1]; 06773 float r = (r1 + r2)/2.0f; 06774 float i = (i1 + i2)/2.0f; 06775 d[bot_idx] = r; 06776 d[top_idx] = r; 06777 d[bot_idx+1] = i; 06778 d[top_idx+1] = -i; 06779 06780 bot_idx = (y+offset)*nx+nx-2; 06781 top_idx = (ny-1-y)*nx+nx-2; 06782 r1 = d[bot_idx]; 06783 i1 = d[bot_idx+1]; 06784 r2 = d[top_idx]; 06785 i2 = d[top_idx+1]; 06786 r = (r1 + r2)/2.0f; 06787 i = (i1 + i2)/2.0f; 06788 d[bot_idx] = r; 06789 d[top_idx] = r; 06790 d[bot_idx+1] = i; 06791 d[top_idx+1] = -i; 06792 } 06793 06794 d[1] = 0; // 0 phase for this componenet 06795 d[nx-1] = 0; // 0 phase for this component 06796 d[ny/2*nx+nx-1] = 0;// 0 phase for this component 06797 d[ny/2*nx+1] = 0;// 0 phase for this component 06798 } 06799 06800 if (image->get_ndim() != 1) image->process_inplace("xform.fourierorigin.tocorner"); 06801 image->do_ift_inplace(); 06802 image->depad(); 06803 }
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Definition at line 196 of file processor.cpp. |