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US 6,747,808 B2Granted
Electronic imaging device focusing
AssigneeHewlett-Packard Development Company, L.P.
InventorsJames S. Voss, William R. Voss
Life of this patent
Estimating the term…
Abstract
An electronic imaging device that is focused by capturing data samples from a region of at least one photodetector while changing focus settings and analyzing the data samples to identify an optimum focus setting. The size of the regions from which the data samples are captured is reduced during focusing to reduce the amount of data to be processed.
Claims24
A method of focusing an electronic imaging device, comprising:
- capturing a plurality of data samples from at least one region of at least one photodetector in said electronic imaging device while changing focus settings in said electronic imaging device;
- reducing a size of said at least one region from which said data samples are captured while said plurality of data samples are being captured, wherein said size of said at least one region is reduced by comparing at least two of said plurality of data samples to identify a plurality of pixels which are affected by focus changes, and selecting at least one smaller region that includes a majority of said plurality of pixels;
- and
- analyzing said plurality of data samples to identify an optimum focus setting.
1 more element
A method of focusing an electronic imaging device, comprising:
- capturing a plurality of data samples from at least one region of at least one photodetector in said electronic imaging device while changing focus settings in said electronic imaging device;
- reducing a size of said at least one region from which said data samples are captured while said plurality of data samples are being captured, wherein boundaries of said at least one region are determined based upon which pixels in at least one previous larger region are most affected by focus changes;
- and
- analyzing said plurality of data samples to identify an optimum focus setting.
1 more element
A method of focusing an electronic imaging device, comprising:
- capturing a plurality of data samples from at least one region of at least one photodetector in said electronic imaging device while changing focus settings in said electronic imaging device, wherein each of said plurality of data samples is captured at a different focus setting;
- reducing a size of said at least one region from which said data samples are captured while said plurality of data samples are being captured;
- and
- analyzing said plurality of data samples to identify an optimum focus setting.
1 more element
An electronic imaging device, comprising:
- at least one photodetector;
- an adjustable-focus lens assembly;
- a control system connected to said photodetector and adjustable-focus lens assembly, said control system having instructions for focusing said adjustable-focus lens assembly, said instructions comprising:
- instructions for changing a focus setting of said adjustable-focus lens assembly while capturing data samples from said at least one photodetector;
- instructions for reducing sizes of regions from which said data samples are captured later during said focusing;
- and
- instructions for analyzing said data samples to identify an optimum focus setting.
4 more elements
Dependencies are inferred from the claim text.