check_dpi: raise exception if resolution == 1 to trigger except clause

Co-authored-by: Robert Sachunsky <38561704+bertsky@users.noreply.github.com>

qurator/eynollah/utils/pil_cv2.py

@@ -18,9 +18,10 @@ def check_dpi(image_filename):
     try:
         exif = OcrdExif(Image.open(image_filename))
         resolution = exif.resolution
+        if resolution == 1:
+            raise Exception()
         if exif.resolutionUnit == 'cm':
             resolution /= 2.54
         return int(resolution)
     except:
         return 230
-