#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 5791 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 5801 of file processor.h. 05802 {
05803 return "Replace a source image with pink Fourier noise, based on a Gaussian. Random phase.";
05804 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 5796 of file processor.h. 05797 {
05798 return NAME;
05799 }
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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 5811 of file processor.h. References EMAN::TypeDict::put(). 05812 {
05813 TypeDict d;
05814 d.put("sigma", EMObject::FLOAT, "sigma value");
05815 return d;
05816 }
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Definition at line 5806 of file processor.h. 05807 {
05808 return new TestImageFourierNoiseGaussian();
05809 }
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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 6685 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. 06686 {
06687 if (!image->is_complex()) {
06688 int nx = image->get_xsize();
06689 int offset = 2 - nx%2;
06690
06691 image->set_size(nx+offset,image->get_ysize(),image->get_zsize());
06692 image->set_complex(true);
06693 if (1 == offset) image->set_fftodd(true);
06694 else image->set_fftodd(false);
06695 image->set_fftpad(true);
06696 }
06697 image->ri2ap();
06698
06699 float sigma = params.set_default("sigma",.25f);
06700
06701 float * d = image->get_data();
06702 int nx = image->get_xsize();
06703 int ny = image->get_ysize();
06704 int nxy = image->get_ysize()*nx;
06705 int nzon2 = image->get_zsize()/2;
06706 int nyon2 = image->get_ysize()/2;
06707 float rx, ry, rz, length, amp, phase;
06708 int twox;
06709 for (int z = 0; z< image->get_zsize(); ++z) {
06710 for (int y = 0; y < image->get_ysize(); ++y) {
06711 for (int x = 0; x < image->get_xsize()/2; ++x) {
06712 rx = (float)x;
06713 ry = (float)nyon2 - (float)y;
06714 rz = (float)nzon2 - (float)z;
06715 length = sqrt(rx*rx + ry*ry + rz*rz);
06716 amp = exp(-sigma*length);
06717 phase = Util::get_frand(0,1)*2*M_PI;
06718
06719 twox = 2*x;
06720 size_t idx1 = twox + y*nx+(size_t)z*nxy;
06721 size_t idx2 = idx1 + 1;
06722 d[idx1] = amp;
06723 d[idx2] = phase;
06724
06725 }
06726 }
06727 }
06728
06729 image->ap2ri();
06730 if (image->get_ndim() == 2) {
06731 bool yodd = image->get_ysize() % 2 == 1;
06732
06733 int yit = image->get_ysize()/2-1;
06734 int offset = 1;
06735 if (yodd) {
06736 offset = 0;
06737 }
06738 for (int y = 0; y < yit; ++y) {
06739 int bot_idx = (y+offset)*nx;
06740 int top_idx = (ny-1-y)*nx;
06741 float r1 = d[bot_idx];
06742 float i1 = d[bot_idx+1];
06743 float r2 = d[top_idx];
06744 float i2 = d[top_idx+1];
06745 float r = (r1 + r2)/2.0f;
06746 float i = (i1 + i2)/2.0f;
06747 d[bot_idx] = r;
06748 d[top_idx] = r;
06749 d[bot_idx+1] = i;
06750 d[top_idx+1] = -i;
06751
06752 bot_idx = (y+offset)*nx+nx-2;
06753 top_idx = (ny-1-y)*nx+nx-2;
06754 r1 = d[bot_idx];
06755 i1 = d[bot_idx+1];
06756 r2 = d[top_idx];
06757 i2 = d[top_idx+1];
06758 r = (r1 + r2)/2.0f;
06759 i = (i1 + i2)/2.0f;
06760 d[bot_idx] = r;
06761 d[top_idx] = r;
06762 d[bot_idx+1] = i;
06763 d[top_idx+1] = -i;
06764 }
06765
06766 d[1] = 0; // 0 phase for this componenet
06767 d[nx-1] = 0; // 0 phase for this component
06768 d[ny/2*nx+nx-1] = 0;// 0 phase for this component
06769 d[ny/2*nx+1] = 0;// 0 phase for this component
06770 }
06771
06772 if (image->get_ndim() != 1) image->process_inplace("xform.fourierorigin.tocorner");
06773 image->do_ift_inplace();
06774 image->depad();
06775 }
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Definition at line 191 of file processor.cpp. |
1.3.9.1