detection

Definition

Finding whether something is present and where — in vision, emitting a box and a class for every object in an image. It is strictly harder than classification, which assigns one label to the whole image, because the model must also propose regions and decide how many there are. Segmentation goes further and labels every pixel; detection stops at coarse extent, which is usually enough for tracking or counting downstream.

Explainers using this term

• Time-Series Anomaly Detection — The Math Behind the AlertsBayesian Online Changepoint Detection
• Object Detection from Scratch (from YOLO to DETR)End-to-End Object Detection with Transformers

In the textbook

• Detection and Segmentation