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Guide to Defining Video Quality Requirements

Revised May 29, 2012
Section 5 of 9 of step 2 -- Generalize Use Cases into Use Classes -- in the bar chart highlighing the 4-step process for definfing video quality requirements.

Target Size

Definition

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.

Scene Content

Lists usage target size consideration, scene, and content information.
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Jumps to use case page. Jumps to use classes page. Jumps to the video system tasks page. Jumps to the video system functions page. Jumps to the recommendations tool for video requirements. Button advances to the previous step in the process for determining video requirement recommendations. Button advances to the next step in the process for determining video requirement recommendations.