diff --git a/opendm/gpu.py b/opendm/gpu.py
index ae7d66f9..52fbc418 100644
--- a/opendm/gpu.py
+++ b/opendm/gpu.py
@@ -15,7 +15,10 @@ def has_popsift_and_can_handle_texsize(width, height):
         if not fits:
             log.ODM_WARNING("Image size (%sx%spx) would not fit in GPU memory, falling back to CPU" % (width, height))
         return fits
-    except:
+    except (ModuleNotFoundError, ImportError):
+        return False
+    except Exception as e:
+        log.ODM_WARNING(str(e))
         return False
 
 @lru_cache(maxsize=None)
diff --git a/opendm/osfm.py b/opendm/osfm.py
index f034eab7..c617988b 100644
--- a/opendm/osfm.py
+++ b/opendm/osfm.py
@@ -205,11 +205,11 @@ class OSFMContext:
                 max_photo = find_largest_photo(photos)
                 w, h = max_photo.width, max_photo.height
                 if w > h:
-                    h = (h / w) * feature_process_size
-                    w = feature_process_size
+                    h = int((h / w) * feature_process_size)
+                    w = int(feature_process_size)
                 else:
-                    w = (w / h) * feature_process_size
-                    h = feature_process_size
+                    w = int((w / h) * feature_process_size)
+                    h = int(feature_process_size)
 
                 if has_popsift_and_can_handle_texsize(w, h) and feature_type == "SIFT":
                     log.ODM_INFO("Using GPU for extracting SIFT features")