US6477271B1 Expired / Lapsed US ⏱️ 0.0 years remaining

Secondary color modification of a digital image

Assignee: Avid Technology Inc

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Filing: 2000-04-07

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Granted: 2002-11-05

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Expires: 2020-04-07

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Abstract

Abstract An ellipsoid chroma region of a chroma plane may be defined to specify a range of chromas for which a secondary chroma modification is to be applied, and to determine an output chroma for each chroma of the chroma plane based on the ellipsoid chroma region. Further, two or more different-shaped chroma regions of a chroma plane may be defined and manipulated, each chroma region specifying a range of chroma for which a secondary chroma modification is to be applied, and to determine an output chroma for each chroma of the chroma plane based on the two or more different-shaped chroma regions. Also, chroma-matching techniques may be used to define and manipulate the chroma region of a chroma plane that specifies a range of chroma for which a secondary chroma modification is to be applied, and an output chroma may be determined for each chroma of the chroma plane based on the chroma region.

Inventors

👤 Brian C. Cooper
👤 Robert Gonsalves
👤 Robert Alan Paoni

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-11-09 18:50

CPC Classifications

H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/62; H04N1/622

Claims Analysis

Total Claims: 17

Claim 1

Independent Claim 165 words

A method of determining output chromas from a plurality of chroma parameter sets, each chroma parameter set including a set of one or more chroma region parameters indicative of a chroma region and a corresponding set of one or more chroma modification parameters indicative of a chroma modification, the method comprising acts of: receiving the plurality of chroma parameter sets; determining, for each chroma parameter set, a chroma region of a first chroma plane corresponding to the chroma region parameters, the chroma region defining a range of chromas of the chroma plane for which a chroma modification is to be applied, wherein at least two of the determined chroma regions have different shapes; determining, for each chroma parameter set, the chroma modification to be applied to chromas in the chroma region; and for each chroma of the chroma plane, determining an output chroma based on the one or more determined chroma regions and the one or more determined chroma modifications corresponding to each chroma region.

Claim 2

Independent Claim 165 words

Claim 3

Independent Claim 207 words

A method of determining output chromas from one or more chroma parameter sets, each chroma parameter set including a set of one or more chroma region parameters indicative of a chroma region and a corresponding set of one or more chroma modification parameters indicative of a chroma modification, the method comprising acts of: for a first chroma parameter set including a set of chroma region parameters and a set of chroma modification parameters, determining at least one of either the chroma region parameter set or the chroma modification parameter set from one or more chromas selected from a chroma source; receiving the one or more chroma parameter sets, including the first chroma parameter set; determining, for each chroma parameter set, a chroma region of a first chroma plane corresponding to the chroma region parameters, the chroma region defining a range of chromas of the chroma plane for which a chroma modification is to be applied; determining, for each chroma parameter set, the chroma modification to be applied to chromas in the chroma region; and for each chroma of the chroma plane, determining an output chroma based on the one or more determined chroma regions and the one or more determined chroma modifications corresponding to each chroma region.

Claim 4

Independent Claim 207 words

Claim 5

Independent Claim 169 words

A method of determining output chromas from one or more chroma parameter sets, each chroma parameter set including a set of one or more chroma region parameters indicative of a chroma region and a corresponding set of one or more chroma modification parameters indicative of a chroma modification, the method comprising acts of: receiving the one or more chroma parameter sets; determining, for each chroma parameter set, a chroma region of a first chroma plane corresponding to the chroma region parameters, the chroma region defining a range of chromas of the chroma plane for which a chroma modification is to be applied, wherein at least one of the determined chroma regions has a shape of an ellipsoid; determining, for each chroma parameter set, the chroma modification to be applied to chromas in the chroma region; and for each chroma of the chroma plane, determining an output chroma based on the one or more determined chroma regions and the one or more determined chroma modifications corresponding to each chroma region.

Claim 6

Independent Claim 169 words

A method of determining output chromas from one or more chroma parameter sets, each chroma parameter set including a set of one or more chroma region parameters indicative of a chroma region and a corresponding set of one or more chroma modification parameters indicative of a chroma modification, the method comprising acts of: receiving the one or more chroma parameter sets; determining, for each chroma parameter set, a chroma region of a first chroma plane corresponding to the chroma region parameters, the chroma region defining a range of chromas of the chroma plane for which a chroma modification is to be applied, wherein at least one of the determined chroma regions has a shape of an ellipsoid; determining, for each chroma parameter set, the chroma modification to be applied to chromas in the chroma region; and for each chroma of the chroma plane, determining an output chroma based on the one or more determined chroma regions and the one or more determined chroma modifications corresponding to each chroma region.

Claim 7

Dependent Claim 32 words

The method of claim 3 , wherein, for each output chroma, the output chroma represents at least a change in a saturation of the chroma from which the output chroma was determined.

Claim 8

Dependent Claim 32 words

The method of claim 4 , wherein, for each output chroma, the output chroma represents at least a change in a hue of the chroma from which the output chroma was determined.

Claim 9

Dependent Claim 82 words

The method of claim 3 , further comprising an act of: providing a chroma lookup table, the lookup table having a number of entries equal to a number of legal chromas of the chroma plane, wherein each entry corresponds to a legal chroma of the chroma plane; and loading the chroma lookup table, including, for one or more output chromas, storing the output chroma in an entry of the lookup table corresponding to the chroma from which the output chroma was determined.

Claim 10

Dependent Claim 77 words

The method of claim 6 , wherein the act of determining an output chroma includes determining that one or more chromas of the chroma plane are not located within any of the determined chroma regions, and wherein the act of loading the chroma lookup table includes, for each chroma of the chroma plane not located within any of the determined chroma regions, storing the chroma in the entry of the chroma lookup table corresponding to the chroma.

Claim 11

Dependent Claim 28 words

The method of claim 6 , the method further comprising acts of: receiving a digital image; and modifying the digital image in accordance with the chroma lookup table.

Claim 12

Dependent Claim 59 words

The method of claim 8 , wherein the act of modifying the digital image includes, for each pixel of the digital image: determining a first chroma of the pixel; accessing an entry in the chroma lookup table corresponding to the determined chroma; and changing the first chroma of the pixel to the output chroma stored at the accessed entry.

Claim 13

Dependent Claim 95 words

The method of claim 9 , wherein the act of determining the output of each chroma of the chroma plane includes: if the chroma is located within any of the determined chroma regions, applying one or more determined chroma modifications to the chroma to produce the output chroma; and if the chroma is located outside of all of the determined chroma regions, assigning a grayscale value to the chroma, wherein pixels of the modified digital image that had a first chroma located outside of all of the determined chroma plane regions have a grayscale value.

Claim 14

Dependent Claim 67 words

The method of claim 9 , wherein the act of determining the output of each chroma of the chroma plane includes: if the chroma is located outside of all of the determined chroma region, applying one or more determined chroma modifications to the chroma to produce the output chroma; and if the chroma is located within any of the determined chroma plane regions, not modifying the chroma.

Claim 15

Dependent Claim 237 words

The method of claim 3 , wherein two or more chroma parameter sets are received, and, the act of determining the output chroma for each chroma of the chroma plane includes: for each chroma of the chroma plane, for a first chroma region: setting an input chroma variable equal to the chroma; determining whether the input chroma variable is located within the chroma region corresponding to the first chroma region; if the input chroma variable is located within the chroma region, applying to the input chroma variable the determined chroma modification corresponding to the chroma region to produce an intermediate chroma variable; and if the input chroma variable is not located within the chroma region, setting the intermediate chroma variable equal to the input chroma variable; and for a next chroma region: setting the input chroma variable equal to the intermediate chroma variable; determining whether the input chroma variable is located within the chroma region corresponding to the first chroma region; if the input chroma variable is located within the chroma region, applying to the chroma variable the determined chroma modification corresponding to the chroma region to produce an intermediate chroma variable; and if the input chroma variable is not located within the chroma region, setting the intermediate chroma variable equal to the input chroma variable, wherein if the next chroma region is a last chroma region; setting the output chroma equal to the intermediate chroma variable.

Claim 16

Dependent Claim 57 words

The method of claim 3 , further comprising acts of: receiving one or more chroma region signals indicative of a change to one of the chroma regions; re-determining the chroma region in accordance with the chroma region signals; and re-determining the chroma modification to be applied to the chroma region in accordance with the chroma region signals.

Claim 17

Dependent Claim 52 words

The method of claim 3 , further comprising acts of: receiving one or more chroma modification signals indicative of a change to one of the chroma modifications; and re-determining the chroma modification to be applied to the chroma modification's corresponding chroma region in accordance with the one or more chroma modification signals.

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2005-11-04	2006-05-06	2006-11-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2009-11-04	2010-05-06	2010-11-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2013-11-04	2014-05-06	2014-11-05	$7700.00	Window Closed / Lapsed

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