Mark reader with reduced trigger-to-decode response time
First Claim
Patent Images
1. A handheld imaging device for imaging a target, the handheld imaging device comprising:
- a user-operated trigger configured to actuate acquisition of images;
an image acquisition sensor that acquires at least one pre-trigger image of the target prior to an actuation of the user-operated trigger and acquires at least one post-trigger image of the target after the actuation of the user-operated trigger;
a pre-trigger process that determines, for the at least one pre-trigger image, at least one pre-trigger image parameter;
an analysis process that analyses the at least one post-trigger image; and
a feedback process that uses the at least one pre-trigger image parameter to control at least one of a post-trigger image acquisition process and the analysis process for the post-trigger image.
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Abstract
Systems and methods for use with a handheld mark reader that reduce the time between activation of the reader'"'"'s trigger and the reader returning a successful decode response. Image processing may be performed prior to the user actuating the trigger and thus obtaining a decodable image with reduced delay. Separate pre-trigger and post-trigger parameters may be used for image decoding. A feedback loop may be incorporated for repeated parameter updates. An adjustable lens may be utilized either with illumination OFF or ON.
29 Citations
22 Claims
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1. A handheld imaging device for imaging a target, the handheld imaging device comprising:
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a user-operated trigger configured to actuate acquisition of images; an image acquisition sensor that acquires at least one pre-trigger image of the target prior to an actuation of the user-operated trigger and acquires at least one post-trigger image of the target after the actuation of the user-operated trigger; a pre-trigger process that determines, for the at least one pre-trigger image, at least one pre-trigger image parameter; an analysis process that analyses the at least one post-trigger image; and a feedback process that uses the at least one pre-trigger image parameter to control at least one of a post-trigger image acquisition process and the analysis process for the post-trigger image. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A handheld imaging device for imaging a target, the handheld imaging device comprising:
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a reader body supporting a user-operated trigger and an image acquisition sensor, the image acquisition sensor configured to acquire images; a pre-trigger image acquisition process that acquires a pre-trigger image of the target prior to an actuation of the user-operated trigger; a first pre-trigger calculation process that calculates, for the pre-trigger image, at least one pre-trigger image parameter; and a feedback process that uses the calculated at least one pre-trigger parameter to control at least one of a post-trigger image acquisition process that acquires a post-trigger image of the target after the actuation of the user-operated trigger and a post-trigger decode process that attempts to decode the post-trigger image. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for decoding an image of a target using a handheld reader, the handheld reader including an image acquisition sensor and a trigger that is configured to initiate a post-trigger acquisition of the image of the target when the trigger is actuated, with a processor being operatively coupled to the trigger and to the image acquisition sensor, the method comprising:
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a) acquiring a pre-trigger image of the target prior to actuation of the trigger; b) activating the processor to analyze the pre-trigger image; c) based upon the analyzing of the pre-trigger image, calculating a pre-trigger acquisition parameter; d) using the calculated pre-trigger acquisition parameter to adjust a subsequent pre-trigger image acquisition with the image acquisition sensor; e) repeating steps b) through d) until the trigger is actuated; and f) after the trigger is actuated, at least one of; acquiring a post-trigger image of the target using the calculated pre-trigger acquisition parameter; and analyzing the post-trigger image based upon the calculated pre-trigger acquisition parameter. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification