Deep-Pack in PyTorch

This repository contains a Pytorch unofficial implementation of the algorithm presented in the paper Deep-Pack: A Vision-Based 2D Online Bin Packing Algorithm with Deep Reinforcement Learning

Modified CNN Architecture

Because the dimension of the proposed concatenated state (W×2H) inputted to the model doesn't satisfyied the dimension requirements of the CNN architecture mentioned in the paper, thus, this repository use the modified CNN architecture to train.

⬇️ CNN architecture for 4x4 bin size

⬇️ CNN architecture for 5x5 bin size

Dataset

The all training and testing dataset are generated from generate_train.py with random seed 777 and generate_test.py with random seed 666.

To reduce the size of this repository, we don't upload the training and testing data except for 4x4 bin size with retangular item.

If you want to see the training and testing data, you can run generate_train.py and generate_test.py to generate it.

Task type

• Bin size
  • 3x3
  • 4x4
  • 5x5
• Items type
  • Unit square (1x1)
  • Only square
  • Rectangular and square

Environments

• OS: Window 10
• Visual Studio Code
• Anaconda3
• Python: 3.9.15
• PyTorch: 2.X.X+cu118

Installation

• If you want to use your own env, then run:

  pip install -r install/requirements.txt
  

• If you want to create new env, then run:

  conda env create -f install/environment.yml
  

  or run:

  .\install\install.bat
  

Usage example

• run.bat
  • Modify this command call D:\anaconda3\Scripts\activate.bat in run.bat, if your anaconda3 path is not in D drive.
  • Modify this command call conda activate deeppack in run.bat, if your anaconda3 env name D is not deeppack.
  • Execute the command in the .bat file, including training and testing parts.
• python main.py --task rectangular --bin_w 4 --bin_h 4 --iterations 300000
  • Execute to train the doubleDQN model.
• python test.py --task rectangular --bin_w 4 --bin_h 4 --sequence_type type1 --max_sequence 4 --iterations 5000
  • Execute to test the result of the trained doubleDQN model.

Result Folder

The all training and testing result and log will be placed in (items_name)_(bin_w)x(bin_h)_result folder.

To reduce the size of this repository, we don't upload the result folders.

If you want to see the traing log and testing result and dynamic demo gifs, you can run run.bat or other command lines, describes in Usage example section, then you will get the whole information.

├── (itemsName)_(binW)x(binH)_result
|   ├── img
|   |   ├── train_record.png
|   |   ├── test_record.png
|   |   ├── test_type*_iter*.gif
|   ├── test
|   |   ├── log.txt
|   |   ├── test_result.txt
|   ├── train
|   |   ├── log.txt
|   ├── hyperparameter.txt
|   ├── (itemsName)_(binW)x(binH).pt

Experimental Results

Train

We only show the result of 4x4 and 5x5 bin size, just like the original paper. If you want to see the result of 3x3 bin size, you can generate 3x3 training data and then train it with suitable hyper-parameters and CNN settings.

We plot the training curves with moving average (window size 50).

Training result of 4x4 bin size

loss	reward	PE

Training result of 5x5 bin size

loss	reward	PE

Test

In test section, we only show the result of 4x4 and 5x5 bin size, just like the original paper, but we have modified some wrong sequence types of the original paper.

Because the training data which are randomly generated may not contain the specific test sequence types, leading to the model doesn't see that pattern, therefore, the result of the test may not perform as good as the training do.

We guess the the training data in the original paper contain the specific test sequence types, thus, the test result of the the original paper is awesome, not like our experiments.

Dynamic Demo Example

The red dot indicates the placement location of the item.

Unit square 4x4 bin with type1 sequence

'type1': [(16, (1, 1))]

iter1	iter2

Square 4x4 bin with random sequence

items are all random, just like training

iter1	iter2

iter3	iter4

Square 4x4 bin with type1 sequence

'type1': [(1, (4, 4))]

iter1	iter2

Square 4x4 bin with type2 sequence

'type2': [(1, (3, 3)), (7, (1, 1))]

iter1	iter2

iter3	iter4

Square 4x4 bin with type3 sequence

'type3': [(3, (2, 2)), (4, (1, 1))]

iter1	iter2

iter3	iter4

Rectangular 4x4 bin with random sequence

items are all random, just like training

iter1	iter2

iter3	iter4

Rectangular 4x4 bin with type1 sequence

'type1': [(1, (3, 2)), (1, (1, 4)), (1, (2, 2)), (1, (1, 2))]

iter1	iter2

iter3	iter4

Rectangular 4x4 bin with type2 sequence

'type2': [(1, (1, 1)), (1, (1, 3)), (1, (3, 1)), (1, (3, 3))]

iter1	iter2

iter3	iter4

Rectangular 4x4 bin with type3 sequence

'type3': [(1, (4, 2)), (2, (2, 2))]

iter1	iter2

iter3	iter4

Unit square 5x5 bin with type1 sequence

'type1': [(25, (1, 1))]

iter1	iter2

Square 5x5 bin with random sequence

items are all random, just like training

iter1	iter2

Square 5x5 bin with type1 sequence

'type1': [(1, (5, 5))]

iter1	iter2

Square 5x5 bin with type2 sequence

'type2': [(4, (2, 2)), (9, (1, 1))]

iter1	iter2

iter3	iter4

Square 5x5 bin with type3 sequence

'type3': [(1, (3, 3)), (3, (2, 2)), (4, (1, 1))]

iter1	iter2

iter3	iter4

Rectangular 5x5 bin with random sequence

items are all random, just like training

iter1	iter2

iter3	iter4

Rectangular 5x5 bin with type1 sequence

'type1': [(4, (2, 2)), (1, (1, 4)), (1, (4, 1)), (1, (1, 1))]

iter1	iter2

iter3	iter4

Rectangular 5x5 bin with type2 sequence

'type2': [(1, (2, 5)), (1, (3, 3)), (1, (3, 2))]

iter1	iter2

iter3	iter4

Rectangular 5x5 bin with type3 sequence

'type3': [(1, (4, 4)), (1, (1, 4)), (1, (4, 1)), (1, (1, 1))]

iter1	iter2

iter3	iter4

References

• Deep-Pack: A Vision-Based 2D Online Bin Packing Algorithm with Deep Reinforcement Learning

• Compute cluster size and compactness

• Double DQN

• TD3 github

• RainbowDQN github