* update model save load

* first add

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* update train.py

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* update utils.py

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* update model_builder.py

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* update export process

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* update train.py

* update train.py

* update train.py

* eval for last epoch model

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* reconsitution humanseg

* first refactor humanseg

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* update all docs involving color label

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* Create 1

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* Create download_optic.py

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* add optic.yaml

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* Delete deeplabv3p_xception65_pet.yaml

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* contrib

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