#include <processor.h>
Inheritance diagram for EMAN::TestImageNoiseGauss:


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.gauss" |
The testimage classes using random numbers should take an int 'seed' parameter. If this parameter is provided, it will be cast into an unsigned int. This will permit initialization to a known state if desired.
| sigma | sigma value of gausian distributed noise, default is 0.5 | |
| mean | mean value of gausian distributed noise, default is zero | |
| seed | mean value of gausian distributed noise, default is zero |
Definition at line 6453 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 6463 of file processor.h. 06464 {
06465 return "Replace a source image as a random noise, the random value is gaussian distributed";
06466 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 6458 of file processor.h. 06459 {
06460 return NAME;
06461 }
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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 6473 of file processor.h. References EMAN::TypeDict::put(). 06474 {
06475 TypeDict d;
06476 d.put("sigma", EMObject::FLOAT, "sigma value of gausian distributed noise, default is 0.5");
06477 d.put("mean", EMObject::FLOAT, "mean value of gausian distributed noise, default is zero.");
06478 d.put("seed", EMObject::INT, "the seed for random number generator, default is not to reseed.");
06479
06480 return d;
06481 }
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Definition at line 6468 of file processor.h. 06469 {
06470 return new TestImageNoiseGauss();
06471 }
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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 7753 of file processor.cpp. References EMAN::EMData::get_data(), EMAN::Randnum::get_gauss_rand(), EMAN::Dict::has_key(), EMAN::Randnum::Instance(), nx, ny, EMAN::TestImageProcessor::preprocess(), EMAN::Randnum::set_seed(), and EMAN::EMData::update(). 07754 {
07755 preprocess(image);
07756
07757 float sigma = params["sigma"];
07758 if (sigma<=0) { sigma = 1.0; }
07759 float mean = params["mean"];
07760
07761 Randnum * r = Randnum::Instance();
07762 if (params.has_key("seed")) {
07763 r->set_seed((int)params["seed"]);
07764 }
07765
07766 float *dat = image->get_data();
07767 size_t size = (size_t)nx*ny*nz;
07768 for (size_t i=0; i<size; ++i) {
07769 dat[i] = r->get_gauss_rand(mean, sigma);
07770 }
07771
07772 image->update();
07773 }
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Definition at line 208 of file processor.cpp. |
1.3.9.1