FlyVisNet

FlyVisNet is an artificial neural network (ANN) that mimics the visual system of fruit fly Drosophila and performs pattern recognition. It classifies images in the classes loom, bar, and spot. The first part of the repository describes the files necessary to generate the primary results of the study. The second part explains the deployment process for embedding FlyVisNet in the Crazyflie drone.

Training and simulations

The order to execute the files and their details are as follows:

• Generate_moving_patterns.py generates the moving patterns (loom, bar, and spot) dataset necessary to train and test the models as .mat files.
• FlyVisNetH_model.py contains the model for the resolution of input images of 244x324.
• FlyVisNetL_model.py contains the model for the resolution of input images of 20x40.
• Train_models.py allows to train FlyVisNetH, FlyVisNetL, Dronet, and MobileNet using the moving patterns dataset, and COIL-100 dataset.
• plot_accuracy_performance.py generates the graphs for accuracy performance comparison between the different architectures.
• FlyVisNet_activity.py generates the graphs for the convolution kernels, 2D feature maps, and 1D activations.
• FlyVisNetH_pruning_model.py contains the model that allows pruning each layer separately.
• Train_pruned_models.py trains the FlyVisNetH model pruning one convolution layer per time.
• Global_prune_models.py prunes the FlyVisNetH model by kernel magnitude-based for different pruning sparsities.
• plot_pruning_accuracy.py generates the graphs with the accuracy performance of the pruned models.
• FlyVisNetH_regression_model.py contains the FlyVisNetH model including an additional output for regression.
• Train_regression_model.py trains the FlyVisNetH model with an additional label corresponding with the pattern centroid position and generates a TFLite model classification_q.tflite.
• Virtual_agent_simulation.py simulates a virtual agent in an environment generated using OpenGL. FlyVisNet allows the agent to navigate in the environment.

Folders:

• data location where the moving patterns dataset is generated.
• WEIGHTS location where the model weights are saved after training.
• performance_mat location where the .mat files containing the accuracy performance are saved after training.
• src contains the functions and elements to generate the virtual environment.
• tex contains the textures used in the virtual environment
• images contains the images used in this readme file
• deployment contains the codes for the deployment of the FlyVisNet on ai-deck GAP8, and autonomous flight algorithm on STM32.

Deployment

The necessary components for deployment are as follow:

• Crazyflie 2.1 drone
• Crazyradio PA 2.4 GHz USB dongle
• Flow deck v2
• AI deck 1.1

Instructions for deployment on crazyflie 2.1 and ai-deck:

• Download bitcraze-vm https://github.com/bitcraze/bitcraze-vm/releases

• On the vm clone aideck-gap8-examples, and crazyflie-firmware repositories:
  https://github.com/bitcraze/aideck-gap8-examples
  https://github.com/bitcraze/crazyflie-firmware

• Substitute the folder classification in aideck-gap8-examples/examples/ai/ by the provided by us in deployment/classification

• Make a folder with name samples inside the folder classification.

• From the generated test dataset .mat file, save the frames as .jpg and put them in the samples folder. You need to share a folder from your PC to the VM to pass those frames.

• Put the generated WEIGHTS/classification_q.tflite in aideck-gap8-examples/examples/ai/classification/model/

• Build and flash on ai-deck GAP8. In folder aideck-gap8-examples:

$ docker run --rm -v ${PWD}:/module aideck-with-autotiler tools/build/make-example examples/ai/classification clean model build image

$ cfloader flash examples/ai/classification/BUILD/GAP8_V2/GCC_RISCV_FREERTOS/target.board.devices.flash.img deck-bcAI:gap8-fw -w radio://0/80/2M/E7E7E7E7E7

• Substitute the folder app_hello_world in crazyflie-firmware/examples/ by the provided by us in deployment/app_hello_world
• From aideck-gap8-examples/examples/ai/classification/BUILD_MODEL_SQ8BIT/ copy the file classificationInfo.h in crazyflie-firmware/examples/app_hello_world/src/
• Build and flash on crazyflie STM32. In folder crazyflie-firmware/examples/app_hello_world:

$ make all clean

$ cfloader flash ./build/cf2.bin stm32-fw -w radio://0/80/2M/E7E7E7E7E7