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#include"Python.h"
#include"structmember.h"
#include<string.h>
//#include "/scisoft/ESRF_sw/linux_i386/include/python2.2/numpy/arrayobject.h"
#include "numpy/arrayobject.h"
#ifdef LINUX
#define _FILE_OFFSET_BITS 64
#endif
#define DEBUG(a)
/* The error object to expose */
static PyObject *ErrorObject;
#define onError(message) { PyErr_SetString(ErrorObject, message); return NULL; }
#define __SINO_Filter_name__ "SINO_Filter_Smooth"
#define __init__Filter__ initSINO_Filter_Smooth
int hst_ffa8__(int* , int* , int* , float *, int* , float *, int *) ;
int hst_ffs8__(int* , int* , int* , float *, int* , float *, int *) ;
void C_HST_EXPNT(int dim_exponts, int dim_fft2, int radix, float *EXPONENTS, int *status)
{
int hst_expnt__(int *maxdat,int * numdat,int * jump,float *twiddle, int *status);
hst_expnt__(&dim_exponts,&dim_fft2,&radix,EXPONENTS,status);
}
static char Filter_doc[]="/* Filter( item ,SINO_FILTER_PARA ) dictionary */";
static PyObject *
Filter(PyObject *self_a, PyObject *args)
{
PyObject * A ;
PyObject * para_dict ;
PyObject * dic_key;
PyObject * dic_value;
/* double threshold ; */
int dim_3,dim_2,dim_1;
float * a_data;
float * sum_line;
int slice_count, proj_count;
int width;
int i;
int x;
int span;
float* smooth_sum_line;
if(!PyArg_ParseTuple(args,"OO:CDD_Filter",&A, ¶_dict ))
return NULL;
/* check the Objects */
if(!PyArray_Check(A )) onError("not a PyArray, argument 1");
if(!PyDict_Check(para_dict )) onError("not a PyDict, argument 2");
/* check the types */
if( ((PyArrayObject *) A ) ->descr->type_num != PyArray_FLOAT ) onError(" arg 1 is not an array of float " ) ;
/* check n of dimensione */
if( ((PyArrayObject *) A)->nd !=3) onError(" arg 1 is not a 3D array " ) ;
/* check contiguity */
if( ((PyArrayObject *) A) ->flags %2 == 0) onError(" array has to be contiguous");
a_data = (float *) ((PyArrayObject *) A)->data;
/* straighforward addressing scheme in case of contiguous memory. Or you'll need to use strides */
dim_3 = ((PyArrayObject *) A)->dimensions[0] ;
dim_2 = ((PyArrayObject *) A)->dimensions[1] ;
dim_1 = ((PyArrayObject *) A)->dimensions[2] ;
/* getting parameter(s) contained in the dictionary */
dic_key = PyString_FromString("SmoothFilter");
dic_value = PyDict_GetItem(para_dict, dic_key);
Py_DECREF(dic_key);
if( dic_value == NULL)
onError(" SmoothFilter key is not integer");
/*
if( !PyArray_Check(dic_value) )
onError("supplied value for FILTER is not an ARRAY ");
if( ((PyArrayObject *) dic_value ) ->descr->type_num != PyArray_FLOAT ) onError(" Filter is not an array of float " ) ;
if( ((PyArrayObject *)dic_value )->nd !=1) onError(" Filter is not a 1D array " ) ;
if( ((PyArrayObject *)dic_value ) ->flags %2 == 0) onError("Filter has to be contiguous");
*/
if( !PyInt_Check(dic_value) )
onError(" unable to find the FILTER key in the passed dictionary");
/* trusting passed value */
span = (int) (PyInt_AsLong(dic_value));
printf("SmoothFilter: span = %i\n", span);
if ( dim_1 < span )
span = dim_1;
if (span % 2)
span += 1;
#define AA(i,j,k) a_data[(k)+dim_1*((j)+dim_2*(i)) ]
sum_line = (float*) malloc( dim_1*sizeof(float) );
smooth_sum_line = (float*) calloc(dim_1*dim_2, sizeof(float));
for(slice_count=0; slice_count< dim_3; slice_count++) {
memset(sum_line,0,dim_1*sizeof(float) );
for( proj_count=0 ; proj_count< dim_2; proj_count++) {
for(i=0; i< dim_1; i++) {
sum_line[i] += AA( slice_count, proj_count, i) ;
}
}
/* smoothing with moving window (span) */
memset(smooth_sum_line,0,dim_1*sizeof(float) );
for (x=0; x<span-1; x++) {
width = x;
for(i=-width; i<width+1; i++) {
smooth_sum_line[x] += sum_line[x+i];
}
smooth_sum_line[x] = smooth_sum_line[x] / (2*x+1);
}
width = (int) (span-1)/2;
for (x=span-1; x<dim_1; x++) {
for(i=-width; i<width+1; i++) {
smooth_sum_line[x] += sum_line[x+i];
}
smooth_sum_line[x] = smooth_sum_line[x] / span;
}
/* write back to sino */
for( proj_count=0 ; proj_count< dim_2; proj_count++) {
for(i=0; i< dim_1; i++) {
AA(slice_count,proj_count,i) = AA(slice_count,proj_count,i) / sum_line[i] * smooth_sum_line[i];
}
}
/*
for(i=0; i< dim_1; i++)
printf("%i %f %f\n", i, sum_line[i], smooth_sum_line[i] );
*/
}
free(sum_line);
free(smooth_sum_line);
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef SINO_Filter_functions [] = {
{"Filter", Filter, METH_VARARGS, Filter_doc},
{ NULL, NULL}
};
void __init__Filter__()
{
PyObject *m, *d;
m = Py_InitModule( __SINO_Filter_name__, SINO_Filter_functions );
d = PyModule_GetDict(m);
ErrorObject = Py_BuildValue("s", __SINO_Filter_name__ ".error");
PyDict_SetItemString(d,"error", ErrorObject);
if(PyErr_Occurred())
Py_FatalError("can't initialize module " __SINO_Filter_name__ );
#ifdef import_array
import_array();
#endif
}
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