Method and system for configuring an imaging device for the reception of digital pulse recognition information
In one aspect, the present disclosure relates 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.
1. A mobile device, comprising:
an image sensor;
a processor coupled to the image sensor;
a memory; and
software in the memory to be run by the processor, wherein running of the software by the processor configures the mobile device to implement functions, including functions to:
determine that the mobile device is in a location enabled with light sources that generate modulated visible light signals;
in response to the determination, initialize parameter settings of the image sensor including locking an exposure setting of the image sensor to optimize the image sensor to receive the modulated visible light signals generated by the light sources;
capture using the image sensor according to the initialized image sensor parameter settings an image containing a representation of a modulated visible light signal generated by one of the light sources in the location; and
obtain information from the visible light signal generated by the one light signal by demodulating the representation of the modulated visible light signal contained in the captured image.
2. The mobile device of claim 1 , wherein when running of the software by the processor to initialize the parameter settings of the image sensor, further configures the mobile device to implement functions, including a function to:
without reference to a mobile device image sensor profile, lock only the exposure setting of the image sensor, wherein locking only the exposure setting prevents automatic camera adjustments from filtering the representation of the modulated visible light signal from the captured image thereby facilitating demodulation of the representation of the modulated visible light signals in the captured image.
3. The mobile device of claim 1 , wherein the parameter settings for the image sensor in addition to the exposure time setting include parameter settings for focus, saturation, white balance, zoom, contrast, brightness, gain, sharpness, ISO, resolution, image quality, scene selection, and metering mode.
4. The mobile device of claim 1 , wherein running of the software by the processor configures the mobile device to implement functions, including functions to:
lock the image sensor parameter settings to prevent adjustment of any of the image sensor parameter settings after the initialization thereby facilitating demodulation of the representation in the captured image.
5. The mobile device of claim 1 , wherein:
the representation of the modulated visible light signal contained in the captured image are alternating dark and light stripes; and
running of the software by the processor configures the mobile device to implement functions, including functions to:
select a demodulation scheme based on a frequency, the frequency corresponding to a stripe width of the alternating dark and light stripes contained in the captured image.
6. The mobile device of claim 1 , wherein running of the software by the processor configures the mobile device to implement functions, including functions to:
adjust a shutter speed of the image sensor, based on a demodulation scheme selected for demodulating the modulated visible light signal represented in the captured image.
7. The mobile device of claim 1 , wherein the image sensor is a rolling shutter camera.
8. The mobile device of claim 7 , wherein running of the software by the processor configures the mobile device to implement functions, including functions to:
measure a speed of the rolling shutter camera; and
based on the measured rolling shutter camera speed, select a demodulation scheme for demodulating the representation of the visible light in the captured image.
9. The mobile device of claim 1 , wherein:
the representation of the modulated visible light signal contained in the captured image comprises alternating dark and light stripes; and
running of the software by the processor configures the mobile device to implement functions, including functions to:
identify a width of one stripe in the alternating dark and white stripes; and
based on the identified stripe width, select a demodulation scheme based on a frequency, the frequency corresponding to the identified stripe width.
10. A method, comprising:
determining based on an ambient light sensor signal, that a mobile device is in a location enabled with light sources that generate modulated visible light signals;
in response to the determination, initializing parameter settings of an image sensor of the mobile device including locking an exposure setting of the image sensor to optimize the image sensor to receive the modulated visible light signals generated by the light sources;
capturing an image containing a representation of a modulated visible light signal generated by one of the light sources in the location using the image sensor according to the image sensor parameter settings; and
obtaining information from the visible light signal generated by the one light source, by demodulating the representation of the modulated visible light signal in the captured image.
11. The method of claim 10 , wherein initializing the parameter settings of the image sensor, comprises a step of:
without reference to a mobile device profile image sensor profile, locking only the exposure setting of the image sensor, wherein locking only the exposure setting prevents automatic camera adjustments from filtering the representations of the modulated visible light signals from the captured image thereby facilitating the demodulation of the representation of the modulated visible light signals in the captured image.
12. The method of claim 10 , wherein the parameter settings for the image sensor in addition to the exposure time parameter setting include parameter settings for focus, saturation, white balance, zoom, contrast, brightness, gain, sharpness, ISO, resolution, image quality, scene selection, and metering mode.
13. The method of claim 10 , further comprising a step of:
locking the image sensor parameter settings to prevent adjustment of any of the image sensor parameter settings after the initialization thereby facilitating demodulation of the representation in the captured image.
14. The method of claim 10 , further comprising a step of:
adjusting a rolling shutter speed of the image sensor, based on a demodulation scheme selected for demodulating the modulated visible light signal represented in the captured image.
15. The method of claim 10 , wherein the representation of the modulated visible light signal in the captured image comprise alternating dark and white stripes contained in the captured image.
16. The method of claim 15 , further comprising a step of:
identifying a width of one stripe in the alternating dark and white stripes; and
based on the identified stripe width, selecting a demodulation scheme based on a frequency, the frequency corresponding to the identified stripe width.
17. The method of claim 15 , further comprising a step of:
selecting a demodulation scheme based on a frequency, the frequency corresponding to a stripe width of alternating dark and white stripes contained in the captured image.
18. The method of claim 15 , wherein the image sensor is a rolling shutter camera.
19. The method of claim 18 , wherein selecting a demodulation scheme further comprises steps of:
measuring a speed of the rolling shutter camera; and
selecting the demodulation scheme based on the measured speed of the rolling shutter camera.