#include <processor.h>
Inheritance diagram for EMAN::RampProcessor:
Public Member Functions | |
void | process_inplace (EMData *image) |
To process an image in-place. | |
string | get_name () const |
Get the processor's name. | |
string | get_desc () const |
Get the descrition of this specific processor. | |
Static Public Member Functions | |
static Processor * | NEW () |
Static Public Attributes | |
static const string | NAME = "filter.ramp" |
A wedge-shaped overall density profile can thus be removed from the picture.
Definition at line 3726 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 3740 of file processor.h. 03741 { 03742 return "Ramp processor -- Fits a least-squares plane " 03743 "to the picture, and subtracts the plane from " 03744 "the picture. A wedge-shaped overall density " 03745 "profile can thus be removed from the picture."; 03746 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 3731 of file processor.h. References NAME. Referenced by process_inplace(). 03732 { 03733 return NAME; 03734 }
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Definition at line 3735 of file processor.h. 03736 { 03737 return new RampProcessor(); 03738 }
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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 7863 of file processor.cpp. References EMAN::EMData::get_data(), get_name(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), ImageDimensionException, LOGERR, and EMAN::EMData::update(). 07864 { 07865 if (!image) { 07866 return; 07867 } 07868 07869 int nz = image->get_zsize(); 07870 if (nz > 1) { 07871 LOGERR("%s Processor doesn't support 3D model", get_name().c_str()); 07872 throw ImageDimensionException("3D model not supported"); 07873 } 07874 07875 int nsam = image->get_xsize(); 07876 int nrow = image->get_ysize(); 07877 int n1 = nsam / 2; 07878 double sx1 = double(n1)*double(nsam+1); 07879 if ( nsam % 2 == 1 ) 07880 sx1 += 1 + n1; 07881 sx1 *= nrow; 07882 int n2 = nrow / 2; 07883 double sx2 = double(n2)*double(nrow+1); 07884 if ( nrow % 2 == 1 ) 07885 sx2 += 1 + n2; 07886 sx2 *= nsam; 07887 float *data = image->get_data(); 07888 float *row = NULL; // handy pointer for values in a specific row of the data 07889 // statistical sums 07890 double syx1 = 0, syx2 = 0, sy = 0, sx1q = 0, sx2q = 0, syq = 0; 07891 for (int j=1; j <= nrow; j++) { 07892 row = data + (j-1)*nsam - 1; // "-1" so that we can start counting at 1 07893 for (int i=1; i<=nsam; i++) { 07894 syx1 += row[i]*i; 07895 syx2 += row[i]*j; 07896 sy += row[i]; 07897 sx1q += i*i; 07898 sx2q += j*j; 07899 syq += row[i]*double(row[i]); 07900 } 07901 } 07902 // least-squares 07903 float dn = float(nsam)*float(nrow); 07904 double qyx1 = syx1 - sx1*sy / dn; 07905 double qyx2 = syx2 - sx2*sy / dn; 07906 double qx1x2 = 0.0; 07907 double qx1 = sx1q - sx1*sx1 / dn; 07908 double qx2 = sx2q - sx2*sx2 / dn; 07909 double qy = syq - sy*sy / dn; 07910 double c = qx1*qx2 - qx1x2*qx1x2; 07911 if ( c > FLT_EPSILON ) { 07912 double b1 = (qyx1*qx2 - qyx2*qx1x2) / c; 07913 double b2 = (qyx2*qx1 - qyx1*qx1x2) / c; 07914 double a = (sy - b1*sx1 - b2*sx2) / dn; 07915 double d = a + b1 + b2; 07916 for (int i=1; i<=nrow; i++) { 07917 qy = d; 07918 row = data + (i-1)*nsam - 1; 07919 for (int k=1; k<=nsam; k++) { 07920 row[k] -= static_cast<float>(qy); 07921 qy += b1; 07922 } 07923 d += b2; 07924 } 07925 } // image not altered if c is zero 07926 07927 image->update(); 07928 }
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Definition at line 3748 of file processor.h. Referenced by get_name(). |