Institute for Telecommunication Sciences / Research / Video Quality Research / Guides and Tutorials / Video Resources / Tools for Video Quality in Public Safety / Guide to Defining Video Quality Requirements / Generalized Use Class Aspects / VQiPS Target Size

VQiPS Target Size

1. Identify
2. Generalize
3. Understand
4. Match


Specifies the size of the object of interest with respect to the field of view.

Target size example: Large
Task: Vehicle identification
Target size example: Small
Task: Facial recognition

The size of the region of interest (target) with respect to the size of the field of view directly affects the ability to recognize that target when the camera is at its maximum optical zoom. The larger the target, the more details can be discerned.

The perceived target size is dependent on the actual target size, its distance from the camera, and the camera’s field of view. As a basic concept, targets can be classified as large or small, as the figure shows. However, the VQiPS working group is developing measurements to more precisely define target size.

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