check for empty line image, ht @andbue, fix #48

OCR-D · Dec 17, 2020 · df53087 · df53087
1 parent 1c7fcda
commit df53087
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/ocrd_calamari/recognize.py b/ocrd_calamari/recognize.py
@@ -74,6 +74,7 @@ def process(self):
                 line_images_np = []
                 for (line_no, line) in enumerate(textlines):
                     line_image, line_coords = self.workspace.image_from_segment(line, region_image, region_xywh)
+                    line_image = line_image if all(line_image.size) else [[0]]
                     line_image_np = np.array(line_image, dtype=np.uint8)
                     line_images_np.append(line_image_np)
                 raw_results_all = self.predictor.predict_raw(line_images_np, progress_bar=False)