From 84a71896f81a1d5e33b25f5a682bafe68659544e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Du=C5=A1an=20Poizl?= <nou.spiro@gmail.com>
Date: Sun, 10 Apr 2022 17:37:10 +0200
Subject: [PATCH] Fix laoding 16 bit signed files

---
 loadrunable.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/loadrunable.cpp b/loadrunable.cpp
index 94c12db..a20b079 100644
--- a/loadrunable.cpp
+++ b/loadrunable.cpp
@@ -184,6 +184,7 @@ bool loadFITS(QString path, ImageInfoData &info, RawImage **image)
         int naxis;
         long naxes[3] = {0};
         fits_get_img_param(file, 3, &imgtype, &naxis, naxes, &status);
+        fits_get_img_equivtype(file, &imgtype, &status);
 
         if(naxis >= 2 && naxis <= 3 && status == 0)
         {
@@ -198,6 +199,10 @@ bool loadFITS(QString path, ImageInfoData &info, RawImage **image)
                 fitstype = TBYTE;
                 break;
             case SHORT_IMG:
+                cvtype = CV_16S;
+                fitstype = TSHORT;
+                break;
+            case USHORT_IMG:
                 cvtype = CV_16U;
                 fitstype = TUSHORT;
                 break;
@@ -219,6 +224,8 @@ bool loadFITS(QString path, ImageInfoData &info, RawImage **image)
                 cv::Mat tmp(h, w, cvtype);
                 fpixel[2] = i;
                 fits_read_pix(file, fitstype, fpixel, size, NULL, tmp.ptr(), NULL, &status);
+                if(cvtype == CV_16S)
+                    tmp.convertTo(tmp, CV_16U, 1, 32767);
                 cvimg.push_back(tmp);
             }