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Substract darks before debayer

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eddyem 2017-07-07 02:15:55 +03:00
parent 9a49eca6aa
commit 312830e9d0
1 changed files with 39 additions and 0 deletions
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39
imfunctions.c
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@ -521,10 +521,49 @@ int store_image(imstorage *img){
}
#endif
#ifdef LIBRAW
static imstorage *dark = NULL;
static double lastdtime = 0.;
if(img->imtype != IMTYPE_DARK){ // store debayer only if image type isn't dark
int lowval = glob_avr - 3*glob_std;
if(glob_min > lowval) lowval = glob_min;
if(dark) do{
if(dtime() - lastdtime > 3600.){ // not more than 1 hour
putlog("Dark too old");
FREE(dark->imdata);
FREE(dark);
break;
}
if(fabs(dark->exptime/img->exptime - 1.) > 0.05){
putlog("Exposures too different, dark: %gs, image: %gs", dark->exptime, img->exptime);
break;
}
if(dark->W != img->W || dark->H != img->H){
putlog("Dark and image have different sizes");
break;
}
// all OK, extract dark
uint16_t *iptr = img->imdata, *dptr = dark->imdata;
size_t s, S = img->W * img->H;
for(s = 0; s < S; ++s, ++iptr, ++dptr){
uint16_t i = *iptr, d = *dptr;
if(i > d) *iptr = i - d;
else *iptr = 0;
}
putlog("Dark extracted");
lowval = 0;
}while(0);
if(write_debayer(img, (uint16_t)lowval)) status |= 8; // and save colour image
}else{ // save last dark
lastdtime = dtime();
if(!dark)
dark = MALLOC(imstorage, 1);
else
FREE(dark->imdata);
memcpy(dark, img, sizeof(imstorage));
size_t S = img->W*img->H;
dark->imdata = MALLOC(uint16_t, S);
memcpy(dark->imdata, img->imdata, sizeof(uint16_t)*S);
putlog("Save last dark image");
}
#endif
putlog("Save image, status=%d", status);