"""
Copyright 2017-2018 Fizyr (https://fizyr.com)

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.
"""

import keras
from ..utils.coco_eval import evaluate_coco


class CocoEval(keras.callbacks.Callback):
    def __init__(self, generator, tensorboard=None, threshold=0.05):
        self.generator = generator
        self.threshold = threshold
        self.tensorboard = tensorboard

        super(CocoEval, self).__init__()

    def on_epoch_end(self, epoch, logs={}):
        coco_tag = ['AP @[ IoU=0.50:0.95 | area=   all | maxDets=100 ]',
                    'AP @[ IoU=0.50      | area=   all | maxDets=100 ]',
                    'AP @[ IoU=0.75      | area=   all | maxDets=100 ]',
                    'AP @[ IoU=0.50:0.95 | area= small | maxDets=100 ]',
                    'AP @[ IoU=0.50:0.95 | area=medium | maxDets=100 ]',
                    'AP @[ IoU=0.50:0.95 | area= large | maxDets=100 ]',
                    'AR @[ IoU=0.50:0.95 | area=   all | maxDets=  1 ]',
                    'AR @[ IoU=0.50:0.95 | area=   all | maxDets= 10 ]',
                    'AR @[ IoU=0.50:0.95 | area=   all | maxDets=100 ]',
                    'AR @[ IoU=0.50:0.95 | area= small | maxDets=100 ]',
                    'AR @[ IoU=0.50:0.95 | area=medium | maxDets=100 ]',
                    'AR @[ IoU=0.50:0.95 | area= large | maxDets=100 ]']
        coco_eval_stats = evaluate_coco(self.generator, self.model, self.threshold)
        if coco_eval_stats is not None and self.tensorboard is not None and self.tensorboard.writer is not None:
            import tensorflow as tf
            summary = tf.Summary()
            for index, result in enumerate(coco_eval_stats):
                summary_value = summary.value.add()
                summary_value.simple_value = result
                summary_value.tag = '{}. {}'.format(index+1,coco_tag[index])
                self.tensorboard.writer.add_summary(summary, epoch)

@@ -2309,11 +2309,14 @@
 ndex
-+
+ + 
 1,
+ 
 coco

Update coco.py