Autofocus using image phase congruency.
Opt Express
; 19(1): 261-70, 2011 Jan 03.
Article
en En
| MEDLINE
| ID: mdl-21263565
ABSTRACT
The key issue in passive autofocus is to choose robust focus measures to judge optical blur in defocused images. Existing focus measures are sensitive to image contrast (illumination) as they use image intensity. In this report we demonstrate a focus measure using phase congruency. The proposed focus measure is robust for noisy imaging sensors in varying illumination conditions, and has great balance of defocus sensitivity and effective range. Its advantages are shown with a number of synthetic image sequences.
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Base de datos:
MEDLINE
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Estados Unidos