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ppocr/metrics/cls_metric.py

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+# copyright (c) 2020 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 ClsMetric(object):
+    def __init__(self, main_indicator="acc", **kwargs):
+        self.main_indicator = main_indicator
+        self.eps = 1e-5
+        self.reset()
+
+    def __call__(self, pred_label, *args, **kwargs):
+        preds, labels = pred_label
+        correct_num = 0
+        all_num = 0
+        for (pred, pred_conf), (target, _) in zip(preds, labels):
+            if pred == target:
+                correct_num += 1
+            all_num += 1
+        self.correct_num += correct_num
+        self.all_num += all_num
+        return {
+            "acc": correct_num / (all_num + self.eps),
+        }
+
+    def get_metric(self):
+        """
+        return metrics {
+                 'acc': 0
+            }
+        """
+        acc = self.correct_num / (self.all_num + self.eps)
+        self.reset()
+        return {"acc": acc}
+
+    def reset(self):
+        self.correct_num = 0
+        self.all_num = 0