Basketball game statistics extraction

Extraction of high level statistics by tracking Basketball game using MaskRCNN, CSRT and interpolation.

YOLO Version of this project: Matteo's Repository

Game tracking

Check out full video!

Results

Ball Accuracy

Running	Accuracy	Precision	Recall	mAP (%)
MaskRCNN	0.83	0.99	0.77	87%
MaskRCNN + Track	0.90	0.89	0.99	-
YOLOv3	0.73	0.99	0.65	-
YOLOv3 + Track	0.89	0.91	0.94	-

Times

Running	Detection	Det + Track	Real-time
MaskRCNN (CPU)	0.8 FPS	0.5 FPS	0.2 FPS
MaskRCNN (GPU**)	4 FPS	3 FPS	0.7+ FPS
YOLOv3 (GPU)	12 FPS	@10 FPS	-

** GPU = RTX 2070

Instructions

1. This files need to be placed in a "project folder" inside samples folder of MaskRCNN Matterport implementation.
   • Something like: MASKRCNN FOLDER/samples/{project folter}/files
2. Follow instructions of original Maskrcnn repository to install dependencies and maskrcnn itself
3. Run the script as indicated below!

Detection's save file format

All the script read and save in MOT challenge format

frame_id, bbox_id, x_pos, y_pos, width, height, score, x, y, z

Files explanation

Training

Dataset folder should contain train and val folder. Follow MaskRCNN rules.

python train.py --weight=[coco|last|imagenet] --dataset=/path/to/dataset

---

Ball Analysis

Detection

Return a txt with all the detection in mot format (det folder) and a video with the bboxes (output folder)

python detection.py detect --weight=[coco or path to your new .h5 weights] --video=/path/to/video

Tracking and Interpolation

Given the previous detection output, it tries to track them using CSRT.

python tracking.py --video=/path/to/video --det=/path/to/detections.txt

Try to fill all the frame without a detection, interpolating tracking and detection infos

python interpolation.py --video=/path/to/video --det=/path/to/tracking.txt

---

Player Analysis

Player Detection

Extract dominant color from player bboxes masks to indentify the team

python detection.py detect --weight=coco --video=/path/to/video

---

Statistics Extraction

Extract Statistics

Extract some base statistic, ball possession and ball position in the two half of the pitch

python stats.py --video=/path/to/video --det_ball=/path/to/ball_tracking.txt --det_player=/path/to/det.txt

Online Computation (Ball + Player detection and stat extration)

Chained and merged ball detection phase, player extraction and statistics

python realtime.py -d --video=/path/to/video --weight=[path to your new .h5 weights]

---

Network evaluation

Calculate mAP and FPS

python evaluate.py --dataset=/path/to/dataset/ --weights=/path/to/new_weights

Ball Network training fine-tunes

• Data Agugmentation using imgaug (Github repo)
• Reduced RPN_ANCHOR_SCALES for better recognition of small objects
• Increased WEIGHTS_DECAY
• Custom training steps:

   # Training network Heads
   model.train(dataset_train, dataset_val,
               learning_rate=config.LEARNING_RATE,
               epochs=int(epochs/2),
               augmentation=augmentation,
               layers='heads')

   # Training network 4+ layers
   model.train(dataset_train, dataset_val,
               learning_rate=config.LEARNING_RATE,
               epochs=epochs,
               layers='4+')
    
   # Training all network layers
   model.train(dataset_train, dataset_val,
               learning_rate=config.LEARNING_RATE/10,
               epochs=int(epochs*1.2),
               layers='all')