Range differentiators for auto-focusing in optical imaging systems

A range differentiator useful for auto-focusing, the range differentiator including an image generator providing an image of a scene at various physical depths, a depth differentiator distinguishing portions of the image at depths below a predetermined threshold, irrespective of a shape of the porti...

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Bibliographische Detailangaben
Hauptverfasser: SHNIT, OFIR, LUTSKER, ILIA, KATZIR, YIGAL, WISEMAN, SHAI, GOLDENBERG, CHAY
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:A range differentiator useful for auto-focusing, the range differentiator including an image generator providing an image of a scene at various physical depths, a depth differentiator distinguishing portions of the image at depths below a predetermined threshold, irrespective of a shape of the portions, and providing a depth differentiated image and a focus distance ascertainer ascertaining a focus distance based on the depth differentiated image.