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int cosmic_rays(DRMS_Record_t *record, float *image, int *badpix, int nbad, int *cosmic, int *n_cosmic, int nx, int ny) |
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{ |
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//fresize: structure obtained from init_fresize_gaussian(&fresizes,stdd,nwd,1); |
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//image: input image |
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//limit: detection limit in sigma (somewhere between 4.0 and 7.0) |
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//cosmic: integer array of image size: will be used to write cosmic ray coordinates into [0...n_cosmic-1] |
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//n_cosmic: number of cosmic ray hits |
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//nx: horizontal dimension |
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//ny: vertical dimension |
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// |
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struct fresize_struct fresizes; |
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float coef[5]; |
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float stdd=fwhm/2.0/sqrt(2.0*log(2.0)); |
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int nwd=(int)(fwhm*kernel_size); //kernel size |
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init_fresize_gaussian(&fresizes,stdd,nwd,1); |
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if (fresize == NULL){printf("can not initialize fresize\n"); exit(EXIT_FAILURE);} |
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coef[0]=1.00000; |
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coef[1]=0.0; |
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coef[2]=0.0; |
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coef[3]=0.0; |
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coef[4]=0.0; |
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int i, j; |
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int count; |
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float *imhp; |
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imhp=(float *)(malloc(nx*ny*sizeof(float))); |
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if (imhp == NULL){printf("can not allocate memory\n"); exit(EXIT_FAILURE);} |
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float *img; |
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img=(float *)(malloc(nx*ny*sizeof(float))); |
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if (img == NULL){printf("can not allocate memory\n"); exit(EXIT_FAILURE);} |
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float sigma, avint; |
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float sum, inty; |
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float sig, r, factor; |
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float x0, y0, rad; |
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float rsun_obs, image_scl; |
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int nump=nx/cent_frac*ny/cent_frac; |
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int status=1, status1, status2; |
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int stat_pos=0; |
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int focid, camid; |
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x0=drms_getkey_float(record,X0_MP_key,&status); |
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if (status != 0 || isnan(x0)){stat_pos=1; printf("no center\n");} |
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y0=drms_getkey_float(record,Y0_MP_key,&status); |
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if (status != 0 || isnan(y0)){stat_pos=1;printf("no center\n");} |
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rsun_obs=drms_getkey_double(record,RSUN_OBS_key,&status1); |
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image_scl=drms_getkey_float(record,IMSCL_MP_key,&status2); |
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if (status1 == 0 && status2 == 0 && !isnan(image_scl) && image_scl > 0.0 && !isnan(rsun_obs) && rsun_obs > 0.0){rad=rsun_obs/image_scl;} else {stat_pos=1;printf("no radius\n"); } |
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focid=drms_getkey_int(record,HCFTID_key,&status1); |
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camid=drms_getkey_int(record,HCAMID_key,&status1); |
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if (status1 != 0 || status2 != 0){printf("no foc id or camera\n"); exit(EXIT_FAILURE);} |
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if ((camid != light_val1 && camid != light_val2) || focid < 1 || focid > 16){stat_pos=1; factor=2.0;} else factor=1; |
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//copy image |
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#pragma omp parallel for private(i,j) |
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for (j=0; j<ny; ++j) for (i=0; i<nx; ++i) img[j*nx+i]=image[j*nx+i]; |
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for (i=0; i<nbad; ++i)if (badpix[i] < 0 || badpix[i] >= 16777216){printf("invalid pixel coordinate\n"); exit(EXIT_FAILURE);} |
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for (i=0; i<nbad; ++i){img[badpix[i]]=NAN; cosmic[i]=badpix[i];} // set bad pixels to NAN |
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fresize(&fresizes,img, imhp, nx,ny,nx,nx,ny,nx,0,0,NAN); //convolve with gaussian |
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#pragma omp parallel for private(i,j) |
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for (j=0; j<ny; ++j) for (i=0; i<nx; ++i) imhp[j*nx+i]=img[j*nx+i]-imhp[j*nx+i]; //highpass filter |
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//get stddev at center |
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//******************************************************************************************************* |
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sum=0.0; |
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inty=0.0; |
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count=0; |
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#pragma omp parallel for reduction(+:sum,inty,count) private(i,j) |
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for (j=ny*(cent_frac-1)/cent_frac/2; j<ny*(cent_frac+1)/cent_frac/2; ++j) for (i=nx*(cent_frac-1)/cent_frac/2; i<nx*(cent_frac+1)/cent_frac/2; ++i) |
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{ |
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if (!isnan(imhp[j*nx+i])) |
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{ |
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sum += imhp[j*nx+i]*imhp[j*nx+i]; |
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inty += image[j*nx+i]; |
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++count; |
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} |
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} |
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//detect everything that stick out more than limit*sigma |
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if (count > nump/2){sigma=sqrt(sum/(float)(count)); avint=inty/(float)count;} else sigma=NAN; |
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//******************************************************************************************************** |
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//check for outliers |
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//******************************************************************************************************* |
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count=nbad; |
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if (!isnan(sigma) && sigma > sigmamin && sigma < sigmamax && avint > avmin && avint < avmax) |
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{ |
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#pragma omp parallel for private(i,j,r) |
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for (j=0; j<ny; ++j) for (i=0; i<nx; ++i) |
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{ |
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if (!isnan(imhp[j*nx+i])) |
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{ |
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if (stat_pos == 0) r=sqrt(pow((float)j-y0,2)+pow((float)i-x0,2))/rad; else r=0.0; |
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if (r< 0.98){ |
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sig=(coef[0]+coef[1]*r+coef[2]*pow(r,2)+coef[3]*pow(r,3)+coef[4]*pow(r,4))*sigma; |
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if (imhp[j*nx+i] > limit*factor*sig || image[j*nx+i] > maxval) |
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{ |
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#pragma omp critical(detect) |
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cosmic[count]=j*nx+i; |
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++count; |
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} |
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} |
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} |
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} |
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status=0; |
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} |
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//******************************************************************************************************** |
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*n_cosmic=count; |
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free_fresize(&fresizes); |
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free(imhp); |
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free(img); |
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return status; |
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} |
