Detecting encoded signals under adverse lighting conditions using adaptive signal detection
First Claim
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1. A method for controlling a portable apparatus, the portable apparatus comprising:
- a camera for capturing data representing imagery or video;
a touchscreen display;
a graphical user interface for providing an interface for display on the touchscreen display;
an encoded signal detector; and
one or more processors, said method comprising;
obtaining data representing imagery or video captured by the camera;
obtaining lighting information via the graphical user interface, the lighting information associated with the data representing imagery or video captured by the camera; and
adapting the encoded signal detector based on the lighting information, in which the adapted encoded signal detector is configured to detect whether auxiliary data is encoded within the data representing imagery or video captured by the camera.
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Abstract
The disclosure relates to image signal processing, encoded signals and fingerprinting. Lighting information, associated with image capture, is used to adapt a signal encoder to fingerprint generator. The encoder or generator can be adapted by applying different weightings to different color channels, the different weightings being associated with the lighting information.
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Citations
18 Claims
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1. A method for controlling a portable apparatus, the portable apparatus comprising:
- a camera for capturing data representing imagery or video;
a touchscreen display;
a graphical user interface for providing an interface for display on the touchscreen display;
an encoded signal detector; and
one or more processors, said method comprising;obtaining data representing imagery or video captured by the camera; obtaining lighting information via the graphical user interface, the lighting information associated with the data representing imagery or video captured by the camera; and adapting the encoded signal detector based on the lighting information, in which the adapted encoded signal detector is configured to detect whether auxiliary data is encoded within the data representing imagery or video captured by the camera. - View Dependent Claims (2, 3, 4, 5, 6)
- a camera for capturing data representing imagery or video;
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7. A method of operating a portable apparatus comprising:
- a camera for capturing data representing imagery or video;
a touchscreen display; and
one or more processors, said method comprising;obtaining data representing imagery or video, the imagery or video having been captured with the camera; obtaining lighting information associated with image capture of the imagery or video, in which the lighting information is associated with a light level or color temperature; adapting an encoded signal detector based on the lighting information; and controlling the adapted encoded signal detector to process the data representing imagery or video to determine whether auxiliary data is encoded therein. - View Dependent Claims (8, 9, 10, 11, 13, 14, 15)
- a camera for capturing data representing imagery or video;
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12. The method of 8 in which the data representing imagery or video comprises a plurality of color channels including at least a blue channel, and in which the blue channel is deemphasized by the adapted encoded signal detector.
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16. A method of operating a portable apparatus comprising:
- a camera for capturing imagery or video;
a touchscreen display; and
one or more electronic processors, said method comprising;obtaining lighting information associated with capturing of the imagery or video by the camera; changing a signal fingerprinting process to deemphasize signal contribution of a blue color channel with the lighting information; and analyzing the data representing imagery or video to derive fingerprint information therefrom with the changed signal fingerprinting process. - View Dependent Claims (17, 18)
- a camera for capturing imagery or video;
Specification