Method and system for normalizing a plurality of signals having a shared component
AssigneeEastman Kodak Company
InventorAlbert D. Edgar
Life of this patent
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Abstract
One aspect of the invention is a method for normalizing a plurality of signals wherein the plurality of signals have a shared component and wherein at least one of the signals has been distorted in a nonlinear way. A distortion function is determined for at least one of the signals which is proportional to the distortion of that signal relative to at least one of the remaining signals. An inverse relative distortion function is generated for the distorted signal responsive to the distortion function that was determined for that signal. The signal is normalized by applying the inverse relative distortion function that was generated for the distorted signal.
Claims56
A method for normalizing a plurality of signals, wherein each of the plurality of signals have a shared component and wherein at least one of the plurality of signals has been distorted in a nonlinear way, comprising:
- determining a distortion function for at least one of the plurality of signals, wherein the distortion function for a particular one signal of the plurality of signals is proportional to the distortion of the particular one signal relative to at least one of the remaining signals in the plurality of signals;
- generating an inverse relative distortion function for the at least one of the plurality of signals, wherein the inverse relative distortion function for a particular one signal of the plurality of signals is responsive to the distortion function that was determined for the particular one signal;
- and
- normalizing the at least one of the plurality of signals by applying the inverse relative distortion function that was generated for that one of the plurality of signals.
A method of enhancing a digital image, comprising:
- determining a distortion function for at least one of a plurality of channels of the digital image, wherein the distortion function for a particular one channel of the plurality of channels is proportional to the distortion of the particular one channel relative to at least one of the remaining channels in the plurality of channels;
- generating an inverse relative distortion function for the at least one of the plurality of channels of the digital image, wherein the inverse relative distortion function for a particular one channel of the plurality of channels is responsive to the distortion function that was determined for the particular one channel;
- and
- normalizing the at least one of the plurality of channels by applying the inverse relative distortion function that was generated for that one of the plurality of channels.
A digital image scanning system comprising:
- scanning hardware operable to scan a photographic image and convert the photographic image into a digital image;
- and
- computer software associated with the scanning hardware and operable to:
- determine a distortion function for at least one of a plurality of channels of the digital image, wherein the distortion function for a particular one channel of the plurality of channels is proportional to the distortion of the particular one channel relative to at least one of the remaining channels in the plurality of channels;
- generate an inverse relative distortion function for the at least one of the plurality of channels of the digital image, wherein the inverse relative distortion function for the particular one channel of the plurality of channels is responsive to the distortion function that was determined for the particular one channel;
- and
- normalize the at least one of the plurality of channels by applying the inverse relative distortion function that was generated for that one of the plurality of channels.
A digital image processing system comprising:
- a computer readable storage medium;
- and
- computer software stored on the computer readable storage medium and operable to:
- determine a distortion function for each of a plurality of channels of a digital image, wherein the distortion function for a particular one channel of the plurality of channels is proportional to the distortion of the particular one channel relative to each of the remaining channels in the plurality of channels;
- generate an inverse relative distortion function for each of the plurality of channels of the digital image, wherein the inverse relative distortion function for a particular one channel of the plurality of channels is proportional to the distortion function that was determined for the particular one channel;
- and
- normalize each of the plurality of channels by applying, for each one of the plurality of channels, the inverse relative distortion function that was generated for that one of the plurality of channels.
A method of enhancing a digital image comprising at least two color channels, the method comprising:
- generating a first color channel alteration function to apply to a first color channel of the digital image, the first color channel alteration function selected such that when applied to the first color channel, the first color channel and a second color channel of the digital image will vary by approximately equal amounts across small distances in the digital image;
- and
- modifying the first color channel in response to the first color channel alteration function.
An altered digital image derived from a digital image, comprising:
- a computer readable storage medium;
- and
- an altered digital image stored on the computer readable storage medium wherein the altered digital image was created by:
- generating a first color channel alteration function to apply to a first color channel of the digital image, the first color channel alteration function selected such that when applied to the first color channel, the first color channel and a second color channel of the digital image will vary by approximately equal amounts across small distances in the digital image, and
- modifying the first color channel in response to the first color channel alteration function.
Dependencies are inferred from the claim text.