I Replaced My $500 GPU with a $75 Raspberry Pi: How Gemma 4 Makes Computer Vision 10x Cheaper

This is a submission for the Gemma 4 Challenge: Write About Gemma 4 Native object detection without YOLO, OpenCV, CUDA, or cloud APIs. Just Gemma 4 multimodal AI running 100% offline on a single-board computer. Metric Traditional CV Gemma 4 Vision Total Cost $500–2000 (GPU + cloud) $75 (Rasp