REDUCING NOISE IN A COLOR IMAGE
First Claim
1. Method of providing a low noise color image, the method comprising:
- exposing an image sensor to visible spectral energy and non-visible spectral energy, said image sensor comprising pixels for obtaining first image data associated with said visible spectral energy and pixels for obtaining second image data associated with said non-visible spectral energy;
generating first and second image data;
subjecting said first image data to a low-pass filter and said second image data to a high-pass filter;
forming a color image by adding at least part of the high frequency components of said second image data to at least part of the low frequency components of said first image data.
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Accused Products
Abstract
A method and an imaging system is described for providing a low noise color image. The method comprises the steps of: exposing an image sensor to visible spectral energy and non-visible spectral energy, said image sensor comprising pixels for obtaining first image data associated with said visible spectral energy and pixels for obtaining second image data associated with said non-visible spectral energy; generating first and second image data; subjecting said first image data to a low-pass filt and said second image data to a high-pass filter; and, forming a color image by adding at least part of the high frequency components of said second image data to at least part of the low frequency components of said first image data.
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Citations
17 Claims
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1. Method of providing a low noise color image, the method comprising:
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exposing an image sensor to visible spectral energy and non-visible spectral energy, said image sensor comprising pixels for obtaining first image data associated with said visible spectral energy and pixels for obtaining second image data associated with said non-visible spectral energy; generating first and second image data; subjecting said first image data to a low-pass filter and said second image data to a high-pass filter; forming a color image by adding at least part of the high frequency components of said second image data to at least part of the low frequency components of said first image data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16)
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11. Image processing apparatus, comprising:
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an input for receiving image data generated by exposing an image sensor to visible and non-visible spectral energy, said image data comprising first image data associated with visible spectral energy and second image data associated with non-visible spectral energy; a noise reduction unit configured to subject said first image data to a low-pass filter and said second image data to a high-pass filter; a blending unit for adding said high-pass filtered infrared image data to said low-pass filtered color image data.
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12. Imaging system, comprising:
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an image sensor configured for exposure to visible spectral energy and non-visible spectral energy, said image sensor comprising pixels for obtaining first image data associated with said visible spectral energy and pixels for obtaining second image data associated with said non-visible spectral energy;
an aperture system configured to control exposure of the image sensor to the visible and non-visible spectral energy, and,an image processing apparatus, comprising; an input for receiving image data generated by exposing the image sensor to visible and non-visible spectral energy, said image data comprising first image data associated with visible spectral energy and second image data associated with non-visible spectral energy; a noise reduction unit configured to subject said first image data to a low-pass filter and said second image data to a high-pass filter; a blending unit for adding said high-pass filtered infrared image data to said low-pass filtered color image data. - View Dependent Claims (13, 14, 17)
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15. A non-transitory computer-readable storage medium with an executable computer program product stored thereon, wherein the computer program product instructs a computer processor to perform a method comprising:
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exposing an image sensor to visible spectral energy and non-visible spectral energy, said image sensor comprising pixels for obtaining first image data associated with said visible spectral energy and pixels for obtaining second image data associated with said non-visible spectral energy; generating first and second image data; subjecting said first image data to a low-pass filter and said second image data to a high-pass filter; forming a color image by adding at least part of the high frequency components of said second image data to at least part of the low frequency components of said first image data.
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Specification