init

backend/ppocr/data/imaug/vqa/token/vqa_token_relation.py

@@ -0,0 +1,67 @@
+# copyright (c) 2021 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+class VQAReTokenRelation(object):
+    def __init__(self, **kwargs):
+        pass
+
+    def __call__(self, data):
+        """
+        build relations
+        """
+        entities = data['entities']
+        relations = data['relations']
+        id2label = data.pop('id2label')
+        empty_entity = data.pop('empty_entity')
+        entity_id_to_index_map = data.pop('entity_id_to_index_map')
+
+        relations = list(set(relations))
+        relations = [
+            rel for rel in relations
+            if rel[0] not in empty_entity and rel[1] not in empty_entity
+        ]
+        kv_relations = []
+        for rel in relations:
+            pair = [id2label[rel[0]], id2label[rel[1]]]
+            if pair == ["question", "answer"]:
+                kv_relations.append({
+                    "head": entity_id_to_index_map[rel[0]],
+                    "tail": entity_id_to_index_map[rel[1]]
+                })
+            elif pair == ["answer", "question"]:
+                kv_relations.append({
+                    "head": entity_id_to_index_map[rel[1]],
+                    "tail": entity_id_to_index_map[rel[0]]
+                })
+            else:
+                continue
+        relations = sorted(
+            [{
+                "head": rel["head"],
+                "tail": rel["tail"],
+                "start_index": self.get_relation_span(rel, entities)[0],
+                "end_index": self.get_relation_span(rel, entities)[1],
+            } for rel in kv_relations],
+            key=lambda x: x["head"], )
+
+        data['relations'] = relations
+        return data
+
+    def get_relation_span(self, rel, entities):
+        bound = []
+        for entity_index in [rel["head"], rel["tail"]]:
+            bound.append(entities[entity_index]["start"])
+            bound.append(entities[entity_index]["end"])
+        return min(bound), max(bound)