Digital camera with GNSS picture location determination
First Claim
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1. A location system for a digital camera, comprising:
- a global navigation satellite system (GNSS) signal sampler to sample a GNSS signal when a digital camera picture is taken to provide a sequence of samples of said GNSS signal and to apply a time tag to said GNSS signal samples corresponding to a time of said picture, said time tag having a receiver time error;
an event time calibrator to calibrate said time tag according to at least one prior or later said receiver time error that is resolved by processing said GNSS signal samples for at least one prior or later said picture, respectively; and
a computer apparatus to process said GNSS signal samples and said time tag to mutually resolve said receiver time error together with coordinates of a GNSS picture position.
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Abstract
A digital camera for providing a short burst of global navigation satellite system (GNSS) signal samples in a picture data file with an approximate time for reading by a computer apparatus some time later for determining the geographical location and an accurate time of the picture.
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Citations
21 Claims
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1. A location system for a digital camera, comprising:
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a global navigation satellite system (GNSS) signal sampler to sample a GNSS signal when a digital camera picture is taken to provide a sequence of samples of said GNSS signal and to apply a time tag to said GNSS signal samples corresponding to a time of said picture, said time tag having a receiver time error; an event time calibrator to calibrate said time tag according to at least one prior or later said receiver time error that is resolved by processing said GNSS signal samples for at least one prior or later said picture, respectively; and a computer apparatus to process said GNSS signal samples and said time tag to mutually resolve said receiver time error together with coordinates of a GNSS picture position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for providing a global navigation satellite system (GNSS)-based position for a picture, comprising:
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converting a scene into digital picture data; sampling a GNSS signal for providing a sequence of samples of said GNSS signal corresponding to said picture data; generating a time tag for said GNSS signal samples corresponding to a time of said picture data, said time tag having a receiver time error; calibrating said time tag according to at least one prior or later said receiver time error that is resolved by processing said GNSS signal samples for at least one prior or later said picture, respectively; and processing said GNSS signal samples and said time tag for mutually resolving said receiver time error together with coordinates of a GNSS picture position. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A tangible medium having computer-readable instructions for reading by a computer for carrying out the following steps:
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converting a scene into digital picture data; sampling a GNSS signal for providing a sequence of samples of said GNSS signal corresponding to said picture data; generating a time tag for said GNSS signal samples corresponding to a time of said picture data, said time tag having a receiver time error; calibrating said time tag according to at least one prior or later said receiver time error that is resolved by processing said GNSS signal samples for at least one prior or later said picture, respectively; and processing said GNSS signal samples for mutually resolving said receiver time error with coordinates of a GNSS picture position.
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Specification