Fix bugs + minor changes

app.py

@@ -188,7 +188,7 @@ def visualize_ocr(pil_img, ocr_result):
         y1 = int(bbox[1])
         x2 = int(bbox[2])
         y2 = int(bbox[3])
-        cv2.rectangle(image, (x1, y1), (x2, y2), color=(0, 255, 0))
+        cv2.rectangle(image, (x1, y1), (x2, y2), color=(0, 0, 255))
         cv2.putText(image, res['text'], (x1, y1), cv2.FONT_HERSHEY_SIMPLEX, fontScale=0.25, color=(255, 0, 0))
     return cv_to_PIL(image)
 
@@ -273,7 +273,7 @@ def visualize_structure(pil_img, structure_result):
         )
 
     plt.legend(handles=legend_elements, bbox_to_anchor=(0.5, -0.02), loc='upper center', borderaxespad=0,
-                    fontsize=10, ncol=3)
+                    fontsize=10, ncol=6)
     plt.gcf().set_size_inches(10, 10)
     plt.axis('off')
     img_buf = io.BytesIO()