# US 2014/0151453 A1 · Devices and Methods Employing Dual Target Auto Exposure

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- Number: US 2014/0151453 A1
- Document ID: US20140151453A1
- Status: Published application
- Kind: A1
- Application number: 14/176,417
- Filed: 2014-02-10
- Published: 2014-06-05
- Earliest claimed: 2011-09-30
- Assignees: Hand Held Products, Inc.
- Applicants: Hand Held Products, Inc.
- Inventors: Timothy P. Meier; Stephen P. Deloge
- Web page: https://patentgrep.com/patent/US20140151453A1

## CPC

- G06K 7/10732: {Light sources}
- G06K 7/10722: {Photodetector array or CCD scanning}
- G06K 7/10752: {Exposure time control}
- G06K 7/10792: {Special measures in relation to the object to be scanned}
- G06K 7/1465: {using several successive scans of the optical code}
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS

## 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.

## Claims

### Claim 1

A device for obtaining images comprising:
an imaging subsystem for capturing images, the imaging subsystem comprising an image sensor;
wherein the device is configured for:
acquiring a first plurality of images based on a first control parameter;
adjusting the first control parameter for a first subsequent image of the first plurality of images based on a first prior image of the first plurality of images;
acquiring a second plurality of images based on a second control parameter that is different from the first control parameter; and
adjusting the second control parameter for a second subsequent image of the second plurality of images based on a second prior image of the second plurality of images.

### Claim 2 (depends on 1)

The device of claim 1, wherein the device is configured for decoding an indicia in one or more images from the first plurality of images and/or the second plurality of images.

### Claim 3 (depends on 1)

The device of claim 1, wherein:
the first plurality of images and the second plurality of images are evenly interspersed;
the first control parameter for image N+2 is based on image N; and
the second control parameter for image N+3 is based on image N+1.

### Claim 4 (depends on 1)

The device of claim 1, wherein:
the first control parameter and the second control parameter are the same control parameter; and
the first control parameter and the second control parameter have different values.

### Claim 5 (depends on 1)

The device of claim 1, wherein:
the first control parameter comprises a first exposure control parameter; and
the second control parameter comprises a second exposure control parameter.

### Claim 6 (depends on 1)

The device of claim 1, wherein the device is configured for:
adjusting the first control parameter according to a first algorithm; and
adjusting the second control parameter according to a second algorithm.

### Claim 7 (depends on 6)

The device of claim 6, wherein the first algorithm and the second algorithm are different.

### Claim 8 (depends on 1)

The device of claim 1, wherein the device is configured for:
acquiring a third plurality of images based on a third control parameter that is different from the first control parameter and the second control parameter; and
adjusting the third control parameter for a third subsequent image of the third plurality of images based on a third prior image of the third plurality of images.

### Claim 9 (depends on 8)

The device of claim 8, wherein:
the first control parameter for image N+3 is based on image N;
the second control parameter for image N+4 is based on image N+1; and
the third control parameter for image N+5 is based on image N+2.

### Claim 10 (depends on 8)

The device of claim 8, wherein the device is configured for:
acquiring a fourth plurality of images based on a fourth control parameter that is different from the first control parameter, the second control parameter, and the third control parameter; and
adjusting the fourth control parameter for a fourth subsequent image of the fourth plurality of images based on a fourth prior image of the fourth plurality of images.

### Claim 11 (depends on 10)

The device of claim 10, wherein:
the first control parameter for image N+4 is based on image N;
the second control parameter for image N+5 is based on image N+1;
the third control parameter for image N+6 is based on image N+2; and
the fourth control parameter for image N+7 is based on image N+3.

### Claim 12

An indicia reader comprising:
an illumination subsystem for projecting an illumination pattern;
an imaging subsystem for capturing images, the imaging subsystem comprising an image sensor;
wherein the indicia reader is configured for:
acquiring a first plurality of images;
while acquiring the first plurality of images, projecting the illumination pattern based on a first control parameter;
adjusting the first control parameter for a first subsequent image of the first plurality of images based on a first prior image of the first plurality of images;
acquiring a second plurality of images;
while acquiring the second plurality of images, not projecting the illumination pattern based on a second control parameter that is different from the first control parameter; and
adjusting the second control parameter for a second subsequent image of the second plurality of images based on a second prior image of the second plurality of images.

### Claim 13 (depends on 12)

The indicia reader of claim 12, wherein:
the first plurality of images and the second plurality of images are evenly interspersed;
the first control parameter for image N+2 is based on image N; and
the second control parameter for image N+3 is based on image N+1.

### Claim 14 (depends on 12)

The indicia reader of claim 12, wherein:
the first control parameter and the second control parameter are the same control parameter; and
the first control parameter and the second control parameter have different values.

### Claim 15 (depends on 12)

The indicia reader of claim 12, wherein:
the first control parameter comprises a first exposure control parameter; and
the second control parameter comprises a second exposure control parameter.

### Claim 16 (depends on 12)

The indicia reader of claim 12, wherein the indicia reader is configured for:
acquiring a third plurality of images based on a third control parameter that is different from the first control parameter and the second control parameter; and
adjusting the third control parameter for a third subsequent image of the third plurality of images based on a third prior image of the third plurality of images.

### Claim 17 (depends on 12)

The indicia reader of claim 12, wherein:
the first control parameter for image N+3 is based on image N;
the second control parameter for image N+4 is based on image N+1; and
the third control parameter for image N+5 is based on image N+2.

### Claim 18

A method for obtaining images comprising:
acquiring, with an imaging subsystem, a first plurality of images based on a first control parameter;
adjusting the first control parameter for a first subsequent image of the first plurality of images based on a first prior image of the first plurality of images;
acquiring, with the imaging subsystem, a second plurality of images based on a second control parameter that is different from the first control parameter; and
adjusting the second control parameter for a second subsequent image of the second plurality of images based on a second prior image of the second plurality of images.

### Claim 19 (depends on 18)

The method of claim 18, comprising attempting to decode an indicia in one or more images from the first plurality of images and/or the second plurality of images.

### Claim 20 (depends on 18)

The method of claim 18, comprising projecting an illumination pattern while acquiring the first plurality of images and/or the second plurality of images.

### Claim 21 (depends on 18)

The method of claim 18, wherein the first plurality of images and the second plurality of images are evenly interspersed;
the first control parameter for image N+2 is based on image N; and
the second control parameter for image N+3 is based on image N+1.

### Claim 22 (depends on 18)

The method of claim 18, wherein:
the first control parameter and the second control parameter are the same control parameter; and
the first control parameter and the second control parameter have different values.

### Claim 23 (depends on 18)

The method of claim 18, wherein:
the first control parameter comprises a first exposure control parameter; and
the second control parameter comprises a second exposure control parameter.

### Claim 24 (depends on 18)

The method of claim 18, comprising:
adjusting the first control parameter according to a first algorithm; and
adjusting the second control parameter according to a second algorithm.

### Claim 25 (depends on 18)

The method of claim 18, comprising:
acquiring a third plurality of images based on a third control parameter that is different from the first control parameter and the second control parameter; and
adjusting the third control parameter for a third subsequent image of the third plurality of images based on a third prior image of the third plurality of images.

### Claim 26 (depends on 25)

The method of claim 25, wherein:
the first control parameter for image N+3 is based on image N;
the second control parameter for image N+4 is based on image N+1; and
the third control parameter for image N+5 is based on image N+2.

### Claim 27 (depends on 18)

The method of claim 18, comprising:
while acquiring the first plurality of images, projecting an illumination pattern based on the first control parameter; and
while acquiring the second plurality of images, not projecting an illumination pattern based on the second control parameter.