Merge pull request #1358 from opencv/nm/fix_preview_size

Increase preview size

CHANGELOG.md

@@ -13,7 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added option to display shape text always
 
 ### Changed
--
+- Increase preview size of a task till 256, 256 on the server
 
 ### Deprecated
 -

cvat/apps/engine/media_extractors.py

@@ -52,11 +52,12 @@ class IMediaReader(ABC):
 
     @staticmethod
     def _get_preview(obj):
+        PREVIEW_SIZE = (256, 256)
         if isinstance(obj, io.IOBase):
             preview = Image.open(obj)
         else:
             preview = obj
-        preview.thumbnail((128, 128))
+        preview.thumbnail(PREVIEW_SIZE)
 
         return preview.convert('RGB')