Fix image size conversion (#1593)

* Fix image size conversion

* update changelog

Co-authored-by: Nikita Manovich <40690625+nmanovic@users.noreply.github.com>

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 -
 
 ### Fixed
+- Fixed dataset filter item representation for imageless dataset items (https://github.com/opencv/cvat/pull/1593)
 - Fixed interpreter crash when trying to import `tensorflow` with no AVX instructions available (https://github.com/opencv/cvat/pull/1567)
 
 ### Security

datumaro/datumaro/components/dataset_filter.py

@@ -32,7 +32,12 @@ class DatasetItemEncoder:
     def encode_image(cls, image):
         image_elem = ET.Element('image')
 
-        h, w = image.size
+        size = image.size
+        if size is not None:
+            h, w = size
+        else:
+            h = 'unknown'
+            w = h
         ET.SubElement(image_elem, 'width').text = str(w)
         ET.SubElement(image_elem, 'height').text = str(h)
 

datumaro/datumaro/plugins/yolo_format/extractor.py

@@ -137,7 +137,8 @@ class YoloExtractor(SourceExtractor):
 
         annotations = []
         if lines:
-            image_height, image_width = image.size # use image info late
+            # use image info as late as possible
+            image_height, image_width = image.size
         for line in lines:
             label_id, xc, yc, w, h = line.split()
             label_id = int(label_id)