DEPTH SENSOR BASED AUTO-FOCUS SYSTEM FOR AN INDICIA SCANNER
First Claim
1. An indicia reading terminal comprising:
- a three dimensional depth sensor configured to capture a depth image of a field of view and create a depth map from the depth image, the depth map having one or more surface distances;
a two dimensional image sensor configured to receive incident light and capture an image therefrom;
an autofocusing lens assembly positioned proximate to the two dimensional image sensor such that the incident light passes through the autofocusing lens before reaching the two dimensional image sensor; and
a processor communicatively coupled to the two dimensional image sensor, the three dimensional depth sensor, and the autofocusing lens assembly.
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Accused Products
Abstract
An indicia reading terminal has a three-dimensional depth sensor, a two dimensional image sensor, an autofocus lens assembly, and a processor. The three dimensional depth sensor captures a depth image of a field of view and create a depth map from the depth image, the depth map having one or more surface distances. The two dimensional image sensor receives incident light and capture an image therefrom. The autofocusing lens assembly is positioned proximate to the two dimensional image sensor such that the incident light passes through the autofocusing lens before reaching the two dimensional image sensor. The processor is communicatively coupled to the two dimensional image sensor, the three dimensional depth sensor, and the autofocusing lens assembly.
179 Citations
20 Claims
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1. An indicia reading terminal comprising:
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a three dimensional depth sensor configured to capture a depth image of a field of view and create a depth map from the depth image, the depth map having one or more surface distances; a two dimensional image sensor configured to receive incident light and capture an image therefrom; an autofocusing lens assembly positioned proximate to the two dimensional image sensor such that the incident light passes through the autofocusing lens before reaching the two dimensional image sensor; and a processor communicatively coupled to the two dimensional image sensor, the three dimensional depth sensor, and the autofocusing lens assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for reading indicia, comprising the steps of:
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providing an indicia reading terminal having; a three dimensional depth sensor, a two dimensional image sensor, and an autofocusing lens assembly positioned proximate to the two dimensional image sensor such that the incident light passes through the autofocusing lens before reaching the two dimensional image sensor; capturing a first depth image of a field of view with the three dimensional depth sensor; determining distances from the indicia reading terminal to major surfaces in the depth image having areas greater than a predetermined threshold to create a depth map of the first depth image; calculating optimal focal distances from the autofocusing lens assembly to each of the major surfaces; capturing a first image with the two dimensional image sensor when the autofocusing lens assembly is focused at one of the optimal focal distances; and decoding an indicia in the captured first image. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification