Adding "difficult", "truncated", "occluded" attributes when convertin…

…g to Pascal VOC if they are not present (#216)

* remove check for 'difficult' attribute

* remove check for 'truncated' and 'occluded' attributes

* update changelog

CHANGELOG.md

@@ -26,6 +26,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Allowed explicit label removal in `remap_labels` transform (<https://github.com/openvinotoolkit/datumaro/pull/203>)
 - Image extension in CVAT format export (<https://github.com/openvinotoolkit/datumaro/pull/214>)
 - Added a label "face" for bounding boxes in Wider Face (<https://github.com/openvinotoolkit/datumaro/pull/215>)
+- Allowed adding "difficult", "truncated", "occluded" attributes when converting to Pascal VOC if these attributes are not present (<https://github.com/openvinotoolkit/datumaro/pull/216>)
 
 ### Security
 -

datumaro/plugins/voc_format/converter.py

@@ -236,20 +236,12 @@ def save_subsets(self):
                             ET.SubElement(obj_elem, 'pose').text = \
                                 str(attr['pose'])
 
-                        if 'truncated' in attr:
-                            truncated = _convert_attr('truncated', attr, int, 0)
-                            ET.SubElement(obj_elem, 'truncated').text = \
-                                '%d' % truncated
-
-                        if 'difficult' in attr:
-                            difficult = _convert_attr('difficult', attr, int, 0)
-                            ET.SubElement(obj_elem, 'difficult').text = \
-                                '%d' % difficult
-
-                        if 'occluded' in attr:
-                            occluded = _convert_attr('occluded', attr, int, 0)
-                            ET.SubElement(obj_elem, 'occluded').text = \
-                                '%d' % occluded
+                        ET.SubElement(obj_elem, 'truncated').text = \
+                            '%d' % _convert_attr('truncated', attr, int, 0)
+                        ET.SubElement(obj_elem, 'occluded').text = \
+                            '%d' % _convert_attr('occluded', attr, int, 0)
+                        ET.SubElement(obj_elem, 'difficult').text = \
+                            '%d' % _convert_attr('difficult', attr, int, 0)
 
                         bbox = obj.get_bbox()
                         if bbox is not None: