#include <averager.h>
Inheritance diagram for EMAN::ImageAverager:
Public Member Functions | |
ImageAverager () | |
void | add_image (EMData *image) |
To add an image to the Averager. | |
EMData * | finish () |
Finish up the averaging and return the result. | |
string | get_name () const |
Get the Averager's name. | |
string | get_desc () const |
TypeDict | get_param_types () const |
Get Averager parameter information in a dictionary. | |
virtual void | mult (const float &) |
Multiply the result image by some floating point constant This is useful when weighting the input images prior to calling add_image - a situation where it is likely you want to divide by the sum of the weights. | |
Static Public Member Functions | |
Averager * | NEW () |
Static Public Attributes | |
const string | NAME = "mean" |
Private Attributes | |
EMData * | sigma_image |
int * | nimg_n0 |
int | ignore0 |
int | nimg |
It optionally makes a sigma image.
sigma | sigma value | |
ignore0 | if set, ignore zero value pixels |
Definition at line 170 of file averager.h.
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Definition at line 186 of file averager.cpp. 00187 : sigma_image(0), nimg_n0(0), ignore0(0), nimg(0) 00188 { 00189 00190 }
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To add an image to the Averager. This image will be averaged in this function.
Implements EMAN::Averager. Definition at line 192 of file averager.cpp. References EMAN::EMData::get_data(), get_name(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), ignore0, EMAN::EMUtil::is_same_size(), LOGERR, nimg, nimg_n0, nx, ny, EMAN::Dict::set_default(), EMAN::EMData::set_size(), and sigma_image. 00193 { 00194 if (!image) { 00195 return; 00196 } 00197 00198 if (nimg >= 1 && !EMUtil::is_same_size(image, result)) { 00199 LOGERR("%sAverager can only process same-size Image", 00200 get_name().c_str()); 00201 return; 00202 } 00203 00204 nimg++; 00205 00206 int nx = image->get_xsize(); 00207 int ny = image->get_ysize(); 00208 int nz = image->get_zsize(); 00209 size_t image_size = (size_t)nx * ny * nz; 00210 00211 if (nimg == 1) { 00212 result = new EMData(); 00213 result->set_size(nx, ny, nz); 00214 sigma_image = params.set_default("sigma", (EMData*)0); 00215 ignore0 = params["ignore0"]; 00216 00217 nimg_n0 = new int[image_size]; 00218 for (size_t i = 0; i < image_size; ++i) { 00219 nimg_n0[i] = 0; 00220 } 00221 } 00222 00223 float *result_data = result->get_data(); 00224 float *sigma_image_data = 0; 00225 if (sigma_image) { 00226 sigma_image->set_size(nx, ny, nz); 00227 sigma_image_data = sigma_image->get_data(); 00228 } 00229 00230 float * image_data = image->get_data(); 00231 00232 if (!ignore0) { 00233 for (size_t j = 0; j < image_size; ++j) { 00234 float f = image_data[j]; 00235 result_data[j] += f; 00236 if (sigma_image_data) { 00237 sigma_image_data[j] += f * f; 00238 } 00239 } 00240 } 00241 else { 00242 for (size_t j = 0; j < image_size; ++j) { 00243 float f = image_data[j]; 00244 if (f) { 00245 result_data[j] += f; 00246 if (sigma_image_data) { 00247 sigma_image_data[j] += f * f; 00248 } 00249 nimg_n0[j]++; 00250 } 00251 } 00252 } 00253 }
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Finish up the averaging and return the result.
Implements EMAN::Averager. Definition at line 255 of file averager.cpp. References EMAN::EMData::get_data(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), nimg, nimg_n0, EMAN::EMData::set_attr(), sigma_image, sqrt(), and EMAN::EMData::update(). 00256 { 00257 if (result && nimg > 1) { 00258 size_t image_size = (size_t)result->get_xsize() * result->get_ysize() * result->get_zsize(); 00259 float * result_data = result->get_data(); 00260 00261 if (!ignore0) { 00262 for (size_t j = 0; j < image_size; ++j) { 00263 result_data[j] /= nimg; 00264 } 00265 00266 if (sigma_image) { 00267 float * sigma_image_data = sigma_image->get_data(); 00268 00269 for (size_t j = 0; j < image_size; ++j) { 00270 float f1 = sigma_image_data[j] / nimg; 00271 float f2 = result_data[j]; 00272 sigma_image_data[j] = sqrt(f1 - f2 * f2); 00273 } 00274 00275 sigma_image->update(); 00276 } 00277 } 00278 else { 00279 for (size_t j = 0; j < image_size; ++j) { 00280 result_data[j] /= nimg_n0[j]; 00281 } 00282 if (sigma_image) { 00283 float * sigma_image_data = sigma_image->get_data(); 00284 00285 for (size_t j = 0; j < image_size; ++j) { 00286 float f1 = sigma_image_data[j] / nimg_n0[j]; 00287 float f2 = result_data[j]; 00288 sigma_image_data[j] = sqrt(f1 - f2 * f2); 00289 } 00290 00291 sigma_image->update(); 00292 } 00293 } 00294 00295 result->update(); 00296 00297 } 00298 result->set_attr("ptcl_repr",nimg); 00299 00300 if( nimg_n0 ) 00301 { 00302 delete [] nimg_n0; 00303 nimg_n0 = 0; 00304 } 00305 00306 return result; 00307 }
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Implements EMAN::Averager. Definition at line 183 of file averager.h. 00184 { 00185 return "Simple mean average of images"; 00186 }
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Get the Averager's name. Each Averager is identified by a unique name.
Implements EMAN::Averager. Definition at line 178 of file averager.h. Referenced by add_image(). 00179 {
00180 return NAME;
00181 }
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Get Averager 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::Averager. Definition at line 193 of file averager.h. References EMAN::TypeDict::put(). 00194 { 00195 TypeDict d; 00196 d.put("sigma", EMObject::EMDATA, "sigma value"); 00197 d.put("ignore0", EMObject::INT, "if set, ignore zero value pixels"); 00198 return d; 00199 }
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Multiply the result image by some floating point constant This is useful when weighting the input images prior to calling add_image - a situation where it is likely you want to divide by the sum of the weights. Hence call mult after all of the weighted images have been added.
Reimplemented from EMAN::Averager. Definition at line 201 of file averager.h. 00201 { }
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Definition at line 188 of file averager.h. 00189 { 00190 return new ImageAverager(); 00191 }
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Definition at line 208 of file averager.h. Referenced by add_image(). |
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Definition at line 45 of file averager.cpp. |
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Definition at line 209 of file averager.h. Referenced by add_image(), and finish(). |
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Definition at line 207 of file averager.h. Referenced by add_image(), and finish(). |
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Definition at line 206 of file averager.h. Referenced by add_image(), and finish(). |