Devices and methods employing dual target auto exposure
DCFirst Claim
1. A device for obtaining images, said device comprising:
- an imaging subsystem comprising an image sensor array and an imaging assembly operative for focusing an image onto said image sensor array;
a housing incorporating said imaging subsystem;
wherein said device is configured to acquire a first plurality of images based on a first control parameter in which said first control parameter for a subsequent image of said first plurality of images is adjusted based on a prior image of said first plurality of images, configured to acquire a second plurality of images based on a second control parameter different from said first control parameter in which said second control parameter for a subsequent image of said second plurality of images is adjusted based on a prior image of said second plurality of images, and configured to acquire said first adjusted plurality of images interspersed with said second differently adjusted plurality of images.
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Abstract
The method includes automatically adjusting a first control parameter in a device for capturing a first plurality of images, automatically adjusting a second control parameter in the device for capturing a second plurality of images such that automatic adjustment of the first control parameter is interspersed with, separate from, and obtained generally concurrently with the automatic adjustment of the second control parameter. The adjustment of the first control parameter being determined differently compared to adjustment of the second control parameter. The method may include attempting to decode a decodable indicia utilizing one or more images of the first and second plurality of images.
598 Citations
32 Claims
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1. A device for obtaining images, said device comprising:
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an imaging subsystem comprising an image sensor array and an imaging assembly operative for focusing an image onto said image sensor array; a housing incorporating said imaging subsystem; wherein said device is configured to acquire a first plurality of images based on a first control parameter in which said first control parameter for a subsequent image of said first plurality of images is adjusted based on a prior image of said first plurality of images, configured to acquire a second plurality of images based on a second control parameter different from said first control parameter in which said second control parameter for a subsequent image of said second plurality of images is adjusted based on a prior image of said second plurality of images, and configured to acquire said first adjusted plurality of images interspersed with said second differently adjusted plurality of images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An indicia reading terminal comprising:
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an illumination subsystem operative for projecting an illumination pattern; an imaging subsystem comprising an image sensor array and an imaging assembly operative for focusing an image onto said image sensor array; a housing incorporating said illumination subsystem and said imaging subsystem; wherein said indicia reading terminal is configured to acquire a first plurality of images exposed during illuminated portions of said illumination pattern based on a first control parameter in which said first control parameter for a subsequent image of said first plurality of images is adjusted based on a prior image of said first plurality of images, configured to acquire a second plurality of images exposed during unilluminated portions of said illumination pattern based on a second control parameter different from said first control parameter in which said second control parameter for a subsequent image of said second plurality of images is adjusted based on a prior image of said second plurality of images, and configured to obtain said first adjusted plurality of images interspersed with said second differently adjusted plurality of images; and wherein said indicia reading terminal is operable to attempt to decode a decodable indicia comprising a bar code disposed on a substrate using at least one of said first plurality of images, and operable to attempt to decode a decodable indicia comprising a bar code disposed on a backlit display using at least one of said second plurality of images. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for use in obtaining images, the method comprising:
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automatically adjusting a first control parameter in a device for capturing a first plurality of images; automatically adjusting a second control parameter different from the first control parameter in the device for capturing a second plurality of images; and automatically obtaining the first adjusted plurality of images interspersed with the second differently adjusted plurality of images. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for decoding decodable indicia, the method comprising:
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projecting an illumination pattern from an indicia reading terminal onto a decodable indicia; automatically adjusting a first control parameter in the indicia reading terminal for capturing a first plurality of images exposed during illuminated portions of the illumination pattern; automatically adjusting a second control parameter different from the first control parameter in the indicia reading terminal for capturing a second plurality of images exposed during unilluminated portions of the illumination pattern; automatically obtaining the first adjusted plurality of images interspersed with the second differently adjusted plurality of images; and attempting to decode the decodable indicia utilizing one or more images of the first and second plurality of images. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification