MobilenetV2 SSDLite train finetune

1 Dataset:

   1.1 coco   http://cocodataset.org/dataset.htm#detections-challenge2017

• python $WORKDIR/dataset_tools/create_coco_tf_record.py \
        --logtostderr \
        --train_image_dir="$DATADIR/train2014" \
        --val_image_dir="$DATADIR/val2014" \
        --train_annotations_file="$DATADIR/annotations/instances_train2014.json" \
        --val_annotations_file="$DATADIR/annotations/instances_val2014.json" \
        --output_dir="$WORKDIR/yx_project/dataset/COCO"
  
• create coco_train.record 13G  with 82783 images
• create coco_val.record 6.3G  with 40504 images

2 pre trained model:

   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.4_224.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.3_224.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.0_224.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.0_192.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.0_160.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.0_128.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_1.0_96.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.75_224.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.75_192.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.75_160.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.75_128.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.75_96.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.5_224.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.5_192.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.5_160.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.5_128.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.5_96.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.35_224.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.35_192.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.35_160.tgz
   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.35_128.tgz

   wget https://storage.googleapis.com/mobilenet_v2/checkpoints/mobilenet_v2_0.35_96.tgz

3 build model/research/objectdetect/proto 

# From tensorflow/models/research/
protoc object_detection/protos/*.proto --python_out=.

Bug: 

1 TypeError: `pred` must be a Tensor, or a Python bool, or 1 or 0. Found instead: None

    Fix: change from mobilenet_v2.training_scope(is_training=None, bn_decay=0.9997))  

                        to     mobilenet_v2.training_scope(is_training=True, bn_decay=0.9997))