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US 7,734,110 B2Granted
Method for filtering the noise of a digital image sequence
AssigneeSTMicroelectronics S.r.l.
InventorsAngelo Bosco, Sebastiano Battiato
Life of this patent
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Abstract
The present invention sets out to make available a method for reducing noise in an image sequence. This method can be implemented in an acquisition device such as a digital video camera or the like. The aim of this invention is attained with a method for filtering a sequence of digital images in CFA format.
Claims20
A method for filtering the noise of a sequence of digital images in video format comprising:
- processing a first video image of the sequence to obtain a corresponding improved video image with reduced noise;
- processing at least one pixel of a second video image of the sequence that temporally follows said first video image, said processing the at least one pixel providing a corresponding filtered pixel and said processing the at least one pixel including:
- selecting a first set of pixels including the at least one pixel and a plurality of pixels of the second video image spatially adjacent to the at least one pixel;
- selecting a second set of pixels including pixels of the corresponding improved video image homologous with the pixels of said first set of pixels;
- carrying out a digital filtering of a first type using pixels from said first set of pixels selected from the second video image and pixels from said second set of pixels selected from the corresponding improved video image to generate the corresponding filtered pixel.
2 more elements
A method of filtering noise from a digital video image comprising:
- processing a first image to generate an improved image;
- processing a second, subsequent image after processing the first image;
- selecting a first pixel from the second, subsequent image during the processing of the second, subsequent image;
- selecting a first set of pixels in the second, subsequent image that have a predetermined spatial relationship to the first pixel;
- locating a second set of pixels in the first image that correspond to the first set of pixels in the second, subsequent image;
- and
- filtering the first pixel using data from both the first set of pixels and the second set of pixels.
4 more elements
Dependencies are inferred from the claim text.