Automatic exposure and white balance control in video cameras: Time course characterization and preference

On a coarse level the lightness and chromatic adaptation of the human visual system (HVS) and signal processing in a video camera are comparable processes. Both adapt to changes in lighting environment and are time dependent. This study developed metrics for characterizing time-course of automatic e...

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Bibliographic Details
Main Authors: Nuutinen, Mikko, Valkonen, Valtteri, Oittinen, Pirkko, Virtanen, Toni
Format: Conference Proceeding
Language:English
Subjects:
Automatic exposure
Automatic white balance
Cameras
Color imaging
Digital video
Image color analysis
Image quality
Kelvin
Lighting
Observers
Steady-state
Online Access:Request full text
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Summary:On a coarse level the lightness and chromatic adaptation of the human visual system (HVS) and signal processing in a video camera are comparable processes. Both adapt to changes in lighting environment and are time dependent. This study developed metrics for characterizing time-course of automatic exposure (AE) and white balance (AWB) controls in video cameras. To evaluate subjective preference for AE and AWB videos, specific scenes with natural lighting changes were designed. Our results show that the subjective preference AE time course is fast and without overshoot. In addition preference speed for the time-course of AWB was about six seconds for videos used in this study.
ISSN:1845-5921
DOI:10.1109/ISPA.2013.6703709