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US 6,487,321 B1Granted
Method and system for altering defects in a digital image
AssigneeApplied Science Fiction, Inc.
InventorsAlbert D. Edgar, Raymond S. Lee
Life of this patent
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Abstract
One aspect of the invention is a method for altering defects in a digital image. At least a first pixel of a first channel of a digital image is filtered using digital circuitry to produce a filtered pixel by averaging the intensity of the first pixel and a plurality of additional pixels in the neighborhood of the first pixel. At least one of the pixels is weighted in response to the intensity value of at least one pixel in a defect channel associated with the digital image. A corrected digital image is produced using the digital circuitry in response to the filtered pixel and the first channel of the digital image.
Claims65
A method for altering defects in a digital image, comprising:
- storing on a computer readable storage medium a digital image comprising at least one channel, the at least one channel comprising a plurality of pixels each having an intensity value;
- storing on the computer readable storage medium a defect channel comprising a plurality of pixels each having an intensity value, at least some of the plurality of pixels in the defect channel having an intensity value proportional to defects in the digital image;
- filtering a first pixel of the at least one channel of the digital image to produce a filtered pixel the filtering of the first pixel responsive to the intensity of the first pixel and a plurality of additional pixels in the neighborhood of the first pixel, wherein at least one of the pixels used in filtering the first pixel is weighted in response to the intensity value of at least one pixel in the defect channel;
- and
- producing a corrected digital image in response to the filtered pixel and the at least one channel.
2 more elements
A method for altering defects in a digital image, comprising:
- filtering, using digital circuitry, a first pixel of a first channel of the digital image to produce a filtered pixel by averaging the intensity of the first pixel and a plurality of additional pixels in the neighborhood of the first pixel, wherein at least one of the pixels used for averaging is weighted in response to the intensity value of at least one pixel in a defect channel associated with the digital image;
- and
- producing a corrected digital image, using digital circuitry, in response to the filtered pixel and the first channel.
A digital image scanning system comprising:
- scanning hardware operable to scan an image and convert the image into a digital image having at least one channel and to produce a defect channel responsive to defects in the image;
- and
- computer software associated with the scanning hardware and operable to:
- filter a first pixel of the at least one channel of the digital image to produce a filtered pixel the filtering of the first pixel responsive to the intensity of the first pixel and a plurality of additional pixels in the neighborhood of the first pixel, wherein at least one of the pixels used in filtering the first pixel is weighted in response to the intensity value of at least one pixel in the defect channel;
- and
- produce a corrected digital image in response to the filtered pixel and the at least one channel.
3 more elements
A digital image processing system comprising:
- a computer readable storage medium;
- computer software stored on the computer readable storage medium and operable to:
- filter a first pixel of the at least one channel of the digital image to produce a filtered pixel the filtering of the first pixel responsive to the intensity of the first pixel and a plurality of additional pixels in the neighborhood of the first pixel, wherein at least one of the pixels used in filtering the first pixel is weighted in response to the intensity value of at least one pixel in the defect channel;
- and
- produce a corrected digital image in response to the filtered pixel and the at least one channel.
2 more elements
An altered digital image derived from a digital image having at least one channel, comprising:
- a computer readable storage medium;
- an altered digital image stored on the computer readable storage medium wherein the altered digital image was created by:
- filtering a first pixel of the at least one channel of the digital image to produce a filtered pixel the filtering of the first pixel responsive to the intensity of the first pixel and a plurality of additional pixels in the neighborhood of the first pixel, wherein at least one of the pixels used in filtering the first pixel is weighted in response to the intensity value of at least one pixel in the defect channel;
- and
- producing a corrected digital image in response to the filtered pixel and the at least one channel.
2 more elements
A method for altering defects in a digital image, comprising:
- storing on a computer readable storage medium a digital image comprising at least one channel, the at least one channel comprising a plurality of pixels each having an intensity value;
- storing on the computer readable storage medium a defect channel comprising a plurality of pixels each having an intensity value, at least some of the plurality of pixels in the defect channel having an intensity value proportional to defects in the digital image;
- creating, using digital circuitry, a plurality of filtered versions of the at least one channel, wherein pixels of the filtered versions of the at least one channel are determined by, for a particular pixel in a particular filtered version, computing a weighted average of the intensity values of the particular pixel and pixels within a region adjacent to the particular pixel in the at least one channel, wherein at least some of the intensity values used in the computation of the weighted average are weighted in response to the intensity value of at least one pixel in the defect channel;
- and
- producing a corrected digital image in response to the plurality of filtered versions of the at least one channel, the original at least one channel, and the defect channel.
2 more elements
Dependencies are inferred from the claim text.