[Closed: Incorrect Branch] [PaddlePaddle Hackathon] Task 70: Add DALI GPU processing for PP-YOLO training

[gbstack]

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New features

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Describe

Hi,

This PR adds DALI processing for PP-YOLO training according to Task #4221

Changing COCODataSet to DALICOCODataSet in configuration file configs/datasets/coco_detection.yml will enable DALI preprocessing.

e.g.

TrainDataset:
  !DALICOCODataSet
    image_dir: train2017
    anno_path: annotations/instances_train2017.json
    dataset_dir: /dataset/coco2017
    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']

And the training command is same as before

python tools/train.py --config configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml

Thanks,

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✅ nemonameless
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❌ cnn
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