Combined optical and digital zoom
First Claim
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1. Zoom apparatus for digital image processing comprising:
- an optical zoom lens arranged to provide an image across a continuous zoom range;
an image sensor arranged to receive an image from the optical zoom lens and to provide a digital representation of the image; and
digital zoom apparatus arranged to apply (a) one of at least two discrete zoom levels to the digital representation of the image such that the total apparent zoom level is the product of the discrete digital zoom level and the optical zoom level, and (b) digital interpolation to the digital representation of the image during a transition period between discrete zoom levels.
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Abstract
Digital and optical zoom are combined over a number of discrete digital zoom levels. Digital interpolation is provided during transition periods between the discrete digital zoom levels such that the total apparent zoom level appears continuous and uninterrupted.
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Citations
23 Claims
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1. Zoom apparatus for digital image processing comprising:
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an optical zoom lens arranged to provide an image across a continuous zoom range;
an image sensor arranged to receive an image from the optical zoom lens and to provide a digital representation of the image; and
digital zoom apparatus arranged to apply (a) one of at least two discrete zoom levels to the digital representation of the image such that the total apparent zoom level is the product of the discrete digital zoom level and the optical zoom level, and (b) digital interpolation to the digital representation of the image during a transition period between discrete zoom levels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 23)
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12. A method of operating a zoom apparatus, the method comprising:
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operating on optical zoom lens across a continuous zoom range to provide an optical image;
applying one of a plurality of discrete digital zoom levels to a digital representation of the optical image such that the total apparent zoom level is the product of the discrete digital zoom level and the optical zoom level; and
applying digital interpolation to the digital representation of the image during a transition period in which the level of discrete digital zoom is changed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification