Method and system for configuring an imaging device for the reception of digital pulse recognition information

• US 9,398,190 B2
• Filed: 12/18/2012
• Issued: 07/19/2016
• Est. Priority Date: 07/26/2011
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Inventors: Ryan, Daniel, Staats, Peter, Sumner, Rob
• Primary Examiner(s): WONG, ALLEN C
• Application Number:
  US13/718,233
• Publication Number:
  US 20130208132A1
• Time in Patent Office: 1,309 Days
• Field of Search: 348/14.08, 348/61, 348/345, 701/208, 455/556.1
• US Class Current: 1/1
• CPC Class Codes: G01C 21/206 specially adapted for indoor navigation
• CPC Class Codes: G01S 17/46 Indirect determination of position data
• CPC Class Codes: G01S 7/484 Transmitters
• CPC Class Codes: G06T 5/50 using two or more images, e.g. averaging or subtraction
• CPC Class Codes: G06T 5/70 Denoising; Smoothing
• CPC Class Codes: H04B 10/1149 Arrangements for indoor wireless networking of information
• CPC Class Codes: H04B 10/116 Visible light communication
• CPC Class Codes: H04N 1/387 Composing, repositioning or otherwise geometrically modifying originals
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
• CPC Class Codes: H04N 23/71 Circuitry for evaluating the brightness variation
• CPC Class Codes: H04N 23/73 by influencing the exposure time
• CPC Class Codes: H04N 23/80 Camera processing pipelines; Components thereof
• CPC Class Codes: H04N 23/81 for suppressing or minimising disturbance in the image signal generation
• CPC Class Codes: H04N 25/531 by controlling rolling shutters in CMOS SSIS
• CPC Class Codes: H04N 25/60 Noise processing, e.g. detecting, correcting, reducing or removing noise
• CPC Class Codes: H04N 5/144 Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20
• CPC Class Codes: H04N 5/455 Demodulation-circuits

Abstract

In one aspect, the present disclosure related to a method for configuring one or more imaging sensors of an imaging device to capture digital images for digital pulse recognition demodulation. In some embodiments, the method includes initializing one or more imaging sensors of the imaging device, determining a subset of the one or more imaging sensors to configure, setting a configuration for each of the one or more imaging sensors of the subset by defining a region of interest as a metering area for each of the one or more imaging sensors of the subset and automatically adjusting a setting for each of the one or more imaging sensors of the subset, and adjusting input parameters of a demodulation function based on a device profile of the imaging device. In some embodiments, the adjusted setting is locked to prevent further adjustment of the adjusted setting.

Claims

1. A method comprising:

setting a capture configuration for an image sensor to capture an image, wherein the capture configuration of the image sensor optimizes a captured image for digital pulse recognition demodulation;

adjusting parameters of a demodulation function, wherein the demodulation function calculates a frequency content of the image based on a detected stripe width;

capturing an image using the image sensor according to the capture configuration; and

processing the captured image using the adjusted demodulation function to obtain information from light based communication.

2. The method of claim 1, comprising locking the capture configuration to prevent further adjustment of the adjusted setting.

3. The method of claim 1, comprising retrieving the capture configuration from a remote server.

4. The method of claim 1, wherein the capture configuration comprises a rolling shutter speed of the image sensor.

5. The method of claim 1, wherein the capture configuration comprises a frame rate, a data format, an encoding scheme, or a color space for the image sensor.

6. The method of claim 1, wherein the parameters of the demodulation function are adjusted based on the capture configuration of the image sensor.

7. The method of claim 1, wherein a frequency corresponding to each stripe width is adjusted based on a rolling shutter speed of the image sensor from the capture configuration.

8. A method comprising:

adjusting, by a processor of a mobile device, parameters of a demodulation function, wherein the demodulation function calculates a frequency content of an image based on a detected stripe width;

capturing an image using an image sensor of the mobile device; and

processing, by the processor of the mobile device, the captured image using the adjusted demodulation function to obtain information from light based communication.

9. The method of claim 8, comprising locking the capture configuration to prevent further adjustment of the adjusted setting.

10. The method of claim 8, comprising retrieving the capture configuration from a remote server.

11. The method of claim 8, wherein the capture configuration comprises a rolling shutter speed of the image sensor.

12. The method of claim 8, wherein the capture configuration comprises a frame rate, a data format, an encoding scheme, or a color space for the image sensor.

13. The method of claim 8, wherein a frequency corresponding to each stripe width is adjusted based on the rolling shutter speed of the image sensor from the capture configuration.

14. A method comprising:

overriding automatic parameter adjustments of an image sensor of a mobile device to set a capture configuration for the image sensor, the automatic parameter adjustments being made by a mobile operating system of the mobile device and the capture configuration being optimized to capture one or more images of visible light modulated with data;

adjusting, based on characteristics of the image sensor, parameters of a demodulation function of the mobile device to optimize the demodulation function for detection of one or more stripes, the one or more stripes resulting from image processing of modulated visible light;

capturing an image using the image sensor according to the capture configuration, the image including visible light modulated with data; and

processing the captured image to demodulate the data from the visible light.

15. The method of claim 14, wherein at least one overridden automatic parameter adjustment is related to exposure.

16. The method of claim 14, wherein at least one overridden automatic parameter adjustment is related to focus.

17. The method of claim 14, wherein at least one overridden automatic parameter adjustment is related to one of saturation, white balance, zoom, contrast, brightness, gain, sharpness, ISO, resolution, image quality, scene selection, or metering mode.

18. The method of claim 14, wherein the capture configuration comprises a rolling shutter speed of the image sensor.