Learn how to train Object Detection Transformers using DETR on custom datasets in this comprehensive tutorial. Set up a Python environment, perform DETR model inference on example images, and download custom datasets from Roboflow Universe. Build custom PyTorch COCO Detection datasets, visualize COCO dataset entries, and create custom PyTorch data loaders. Construct a custom PyTorch Lightning DETR module for training your own object detection model. Follow step-by-step instructions for training DETR on your custom dataset, performing custom DETR model inference, and evaluating the model's performance. Gain practical insights into implementing advanced object detection techniques using transformers and custom datasets.