Adaptive illumination for color-corrected underwater imaging
First Claim
1. An apparatus for color-corrected underwater imaging comprising:
- a plurality of optical sources each having a unique optical spectrum;
a range sensor adapted to determine a range to an underwater object to be imaged;
a memory module; and
a processor in communication with the range sensor and the memory module, the processor selecting a plurality of predetermined control values from the memory module in response to a range determined by the range sensor, the processor controlling an optical power of each of the optical sources in response to the selected predetermined control values for color-corrected imaging of the underwater object at the determined range.
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Abstract
Described are a method and an apparatus for color-corrected underwater imaging. A range to an underwater object to be imaged is determined and control values are selected according to the range. Control values are predetermined for a number of ranges according to an optimization of a color quality factor for each range based on the spectra of the optical sources used for illumination and the wavelength-dependent optical transmission of the water for the range. The optical power of each optical source is controlled according to a respective one of the selected control values. Advantageously, an acquired image requires no color correction as the adaptive illumination compensates for the wavelength-dependent losses in the light propagation path from the optical sources to the object and from the object to the imaging device.
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Citations
22 Claims
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1. An apparatus for color-corrected underwater imaging comprising:
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a plurality of optical sources each having a unique optical spectrum; a range sensor adapted to determine a range to an underwater object to be imaged; a memory module; and a processor in communication with the range sensor and the memory module, the processor selecting a plurality of predetermined control values from the memory module in response to a range determined by the range sensor, the processor controlling an optical power of each of the optical sources in response to the selected predetermined control values for color-corrected imaging of the underwater object at the determined range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for color-corrected underwater imaging, the method comprising:
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determining a range to an underwater object to be imaged; selecting a plurality of control values in response to the range, the control values being predetermined according to an optimization of a color quality factor for the range; and for each of the selected control values, controlling an optical power of an illumination of the underwater object, each illumination having a unique optical spectrum, wherein an image of the underwater object is color-corrected. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification