Reader for optical indicia presented under two or more imaging conditions within a single frame time

• US 10,311,274 B2
• Filed: 10/03/2018
• Issued: 06/04/2019
• Est. Priority Date: 11/16/2016
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Inventors: Giordano, Patrick A., Good, Timothy, Van Horn, Erik, Kearney, Sean P., Colavito, Stephen J., Xian, Tao, Feng, Chen, Bremer, Edward C.
• Primary Examiner(s): Frech, Karl D
• Application Number:
  US16/150,936
• Publication Number:
  US 20190034683A1
• Time in Patent Office: 244 Days
• Field of Search: 2354621, 23546211, 23546212, 23546241, 23546242
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 7/10554 Moving beam scanning
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/1417 2D bar codes

Abstract

The present invention embraces an optical indicia reader, e.g., barcode scanner, that captures images of optical indicia under multiple imaging conditions within the span of a single frame. The reader includes an image sensor having selectively-addressable pixels that can be divided into groups having regions of interest (ROIs) within the reader field of view. Each pixel group is shuttered separately to obtain independent partial frame images under separate imaging conditions.

Claims

1. A method comprising:

illuminating, an optical indicia, located in a field of view of an optical reader;

selectively obtaining, by plurality of pixels of an image sensor, image data from the field of view of the optical reader;

exposing a first group of pixels, from amongst the plurality of pixels of the image sensor to obtain a first partial frame of the image data, from a first region of interest, in the field of view, wherein exposing the first group of pixels has a first group start time and a first group end time;

exposing, separately from the first group of pixels, a second group of pixels, from amongst the plurality of pixels, of the image sensor, to obtain a second partial frame of the image data, from a second region of interest, in the field of view, wherein exposing the second group of pixels has a second group start time and a second group end time; and

wherein the first partial frame and the second partial frame of the image data are obtained within a single frame time, and wherein the first group start time and the first group end time are different from the second group start time and the second group end time.

2. The method of claim 1, further comprising:

providing a first illumination profile and a second illumination profile by an illuminator while exposing of the first group of pixels and the second group of pixels.

3. The method of claim 2, wherein the first illumination profile and the second illumination profile are different from each other.

4. The method of claim 3, wherein one of the first illumination profile or the second illumination profile is a single illumination pulse.

5. The method of claim 3, wherein one of the first illumination profile or the second illumination profile does not include an illumination pulse.

6. The method of claim 3, further comprising:

exposing the first group of pixels during a first exposure period defined by the first group start time and the first group end time, and exposing the second group of pixels during a second exposure period defined by the second group start time and the second group end time.

7. The method of claim 6, wherein the first exposure period and the second exposure period partially overlap within the single frame time.

8. The method of claim 6, wherein the first exposure period and the second exposure period occur sequentially within the single frame time.

9. The method of claim 6, wherein the first illumination profile and the first exposure period for the first group of pixels is optimized for reading optical indicia printed on a physical substrate.

10. The method of claim 9, wherein the second illumination profile and the second exposure period for the second group of pixels is optimized for reading electronically displayed optical indicia.

11. The method of claim 1, wherein the plurality of pixels are selectively addressable.

12. The method of claim 1, wherein at least a portion of the first region of interest and the second region of interest are interlaced.

13. The method of claim 12, wherein the first region of interest and the second region of interest are not interlaced.

14. The method of claim 1, further comprising:

processing the first partial frame of the image data and the second partial frame of the image data to identify and decode at least one optical indicia visually depicted therein.

15. A method of capturing images under two or more separate imaging conditions within a single frame time by an optical reader, the method comprising:

splitting, plurality of addressable pixels of an image sensor, between a first group of pixels and a second group of pixels,

illuminating, optical indicia located in a field of view of the optical reader;

exposing the first group of pixels and the second group of pixels, separately, to obtain partial frames of image data respectively;

configuring imaging settings for the first group of pixels to a first predetermined scanning mode optimized for reading optical indicia presented in one form,

configuring imaging settings for the second group of pixels to a second predetermined scanning mode optimized for reading optical indicia presented in at least one indicia another form, and

wherein imaging settings for each of the first and second predetermined scanning modes include an exposure period, and

wherein the exposure period for the first predetermined scanning mode having a different start time and end time from the exposure period for the second predetermined scanning mode.

16. The method of claim 15, wherein the first predetermined scanning mode includes imaging settings optimized for reading optical indicia printed on a physical substrate and the second predetermined scanning mode includes imaging settings optimized for reading optical indicia digitally displayed with an electronic device.

17. The method of claim 16, wherein the imaging settings of the first predetermined scanning mode includes a single illumination pulse directed to the field of view.

18. The method of claim 17, wherein the imaging settings for the second predetermined scanning mode include an exposure period for the second group of pixels having a start time after the first group of pixels has received reflected light from the single illumination pulse.

19. The method of claim 15, further comprising:

processing each of the partial frames of image data to identify and read optical indicia from at least one of the images obtained with optimized image settings.

20. A method for scanning and decoding a plurality of indicia including at least one of paper printed and digital barcodes, with a single frame of image data obtained from a field of view of an optical reader, the method comprising:

splitting, a plurality of addressable pixels in an image sensor into two or more group of pixels with regions of interest in the field of view;

illuminating, an object including at least one indicia, in the field of view of the optical reader with varying intensity and duration;

exposing the two or more group of pixels separately to obtain partial frames of image data;

configuring imaging settings for a first group of pixels to a first predetermined scanning mode optimized for reading paper barcodes,

configuring imaging settings for a second group of pixels to a second predetermined scanning mode optimized for reading digital barcodes, and

wherein imaging settings for each of the first and second predetermined scanning modes include an exposure period, and

wherein the exposure period for the first predetermined scanning mode having a different start time and end time from the exposure period for the second predetermined scanning mode.