Barcode-reading application for a mobile device with a high resolution color camera

Patent metadata

Field	Value
Publication number	US-9710685-B2
Application number	US-201414527735-A
Country	US
Kind code	B2
Filing date	Oct 29, 2014
Priority date	Oct 4, 2012
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

This patent specification describes a barcode reading application for a mobile device. The mobile device comprises a camera, which comprises an image sensor array and an output module coupled to the image sensor array. The image sensor array includes a plurality of pixels and the output module is capable of providing output in both: i) a primary color format wherein each pixel is represented by an intensity of each of three primary colors; and ii) a color space format wherein each pixel is represented by an intensity value and a plurality of chromatic values. The barcode reading application is configured to perform one of: i) confirming that the output module is set to provide output in the color space format; and ii) setting the output module to provide output in the color space format.

First claim

What is claimed is:

1. A barcode reading application for a mobile device, the mobile device being selected from the group consisting of smartphones and tablets and comprising a processor, a display screen, memory and a camera comprising an image sensor array, a camera lens focusing illumination from a camera field of view onto the image sensor array, and an output module coupled to the image sensor array, wherein the image sensor array includes a plurality of pixels and the output module being capable of providing output in both: i) a primary color format wherein each pixel is represented by an intensity of each of three primary colors; and ii) a color space format wherein each pixel is represented by an intensity value and a plurality of chromatic values, the barcode reading application comprising executable code stored in the memory that, when executed by the processor:
performs one of: i) confirming that the output module is set to provide output in the color space format; and ii) setting the output module to provide output in the color space format;
causes the camera to capture an image of a barcode within the camera field of view;
receives the color space format intensity value associated with each pixel; and
decodes the barcode using the intensity values independently of the chromatic values.

2. The barcode reading application of claim 1 , wherein an auto-white balance module coupled to the image sensor array is capable of performing an auto-white balance function and the barcode reading application, when executed by the processor, further performs one of: i) confirming that the auto-white balance function is disabled prior to causing the camera to capture the image of the barcode; and ii) disabling the auto-white balance function prior to causing the camera to capture the image of the barcode.

3. The barcode reading application of claim 1 , wherein the image sensor array is capable of providing output at a full resolution and at a reduced resolution, the full resolution comprising substantially all of the pixels of the image sensor array, the reduced resolution comprising binned pixels of a binned quantity less than a capture quantity of pixels that can be captured by the image sensor array,
wherein each binned pixel comprises a binned intensity value that is a function of intensity values of a plurality of contiguous pixels captured by the image sensor array, wherein the barcode reading application, when executed by the processor, further performs one of: i) confirming that the image sensor array is set to provide output at the reduced resolution; and ii) setting the image sensor array to provide output at the reduced resolution.

4. The barcode reading application of claim 1 , wherein the camera is capable of performing an autofocusing function which adjusts a camera focus distance of the camera, the camera focus distance being a distance from the camera lens at which light rays originating from the distance are focused on the image sensor array, wherein the barcode reading application, when executed by the processor, further performs at least one of: i) setting the camera lens to one of a plurality of predetermined focus positions; and ii) enabling autofocus of the camera within a limited range less than a full range of focus positions of the camera.

5. The barcode reading application of claim 4 , wherein an auto-white balance module coupled to the image sensor array comprises an auto-white balance function capable of performing auto-white balance, wherein the barcode reading application, when executed by the processor, further performs one of: i) confirming that the auto-white balance function is disabled prior to actuating the camera to capture the image of the barcode; and ii) disabling the auto-white balance function prior to causing the camera to capture the image of the barcode.

6. The barcode reading application of claim 4 , wherein the image sensor array is capable of providing output at a full resolution and at a reduced resolution, the full resolution comprising substantially all of the pixels of the image sensor array, the reduced resolution comprising binned pixels of a binned quantity less than a capture quantity of pixels that can be captured by the image sensor array,
wherein each binned pixel comprises a binned intensity value that is a function of the intensity values of a plurality of contiguous pixels captured by the image sensor array, wherein the barcode reading application, when executed by the processor, further performs one of: i) confirming that the image sensor array is set to provide output at the reduced resolution; and ii) setting the image sensor array to provide output at the reduced resolution.

7. The barcode reading application of claim 1 , wherein the memory comprises an operating system executable by the processor, the operating system controlling operation of the camera, wherein setting the image sensor array to provide output in the color space format comprises the barcode reading application instructing the operating system to signal the image sensor array to provide output in the color space format.

8. The barcode reading application of claim 7 , wherein an auto-white balance module coupled to the image sensor array comprises an auto-white balance function capable of performing auto-white balance, wherein the barcode reading application, when executed by the processor, further instructs the operating system to perform one of: i) confirming that the auto-white balance function is disabled prior to actuating the camera to capture the image of the barcode; and ii) disabling the auto-white balance function prior to causing the camera to capture the image of the barcode.

9. The barcode reading application of claim 7 , wherein the image sensor array is capable of providing output at a full resolution and at a reduced resolution, the full resolution comprising substantially all of the pixels of the image sensor array, the reduced resolution comprising binned pixels of a binned quantity less than a capture quantity of pixels that can be captured by the image sensor array,
wherein each binned pixel comprises a binned intensity value that is a function of the intensity values of a plurality of contiguous pixels captured by the image sensor array, wherein the barcode reading application, when executed by the processor, further instructs the operating system to perform one of: i) confirming that the image sensor array is set to provide output at the reduced resolution; and ii) setting the image sensor array to provide output at the reduced resolution.

10. The barcode reading application of claim 7 , wherein the operating system further comprises a camera auto focusing function which adjusts a camera focus distance of the camera, the camera focus distance being a distance from the camera lens at which light rays originating from the distance
are focused on the image sensor array, wherein the barcode reading application, when executed by the processor, further instructs the operating system to perform at least one of: i) setting the camera lens to one of a plurality of predetermined focus positions; and ii) enabling autofocus of the camera within a limited range less than a full range of focus positions of the camera.

11. The barcode reading application of claim 10 , wherein an auto-white balance module coupled to the image sensor array comprises an auto-white balance function capable of performing auto-white balance, wherein the barcode reading application, when executed by the processor, further instructs the operating system to perform one of: i) confirming that the auto-white balance function is disabled prior to actuating the camera to capture the image of the barcode;

Assignees

• Code Corp

Inventors

• Lei Ming
• Hoobler Ryan
• Russell Garrett
• Powell George
• Ashby Mark

Classifications

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title

• H01M2/1022

  Electricity · mapped topic

• G06K7/1404

  Methods for optical code recognition · CPC title

• G06K7/10811

  Focalisation · CPC title

• G06K7/0004

  Hybrid readers · CPC title