US5315694A — High-speed color saturation converter for digital…

Claim 1

Independent Claim 175 words

A high-speed saturation converter for a color image, comprising: first R, G, and B image memories for storing digital color image data separated into R, G, and B components, r, g, and b; matrix coefficient calculating means for calculating two types of matrix coefficients α and β defined by the following equation based on a predetermined saturation conversion coefficient a: α=1+2a, β=1-a; processor means for calculating R, G, and B components r*, g*, and b* of a first pixel position when saturation conversion S*=aS is performed with respect to vector S, in an RGB color space, of saturation components r, g, and b of a second pixel position of said first R, G, and B image memories that corresponds to the first pixel position, in accordance with the following matrix equation defined when an intensity before and after the conversion is constant: ##EQU10## and second R, G, and B image memories for storing the R, G, and B components r*, g*, and b* calculated by said processor means in a position of the first pixel.

Claim 2

Dependent Claim 175 words

A high-speed saturation converter for a color image, comprising: first R, G, and B image memories for storing digital color image data separated into R, G, and B components, r, g, and b; matrix coefficient calculating means for calculating two types of matrix coefficients α and β defined by the following equation based on a predetermined saturation conversion coefficient a: α=1+2a, β=1-a; processor means for calculating R, G, and B components r*, g*, and b* of a first pixel position when saturation conversion S*=aS is performed with respect to vector S, in an RGB color space, of saturation components r, g, and b of a second pixel position of said first R, G, and B image memories that corresponds to the first pixel position, in accordance with the following matrix equation defined when an intensity before and after the conversion is constant: ##EQU10## and second R, G, and B image memories for storing the R, G, and B components r*, g*, and b* calculated by said processor means in a position of the first pixel.

Claim 3

Dependent Claim 22 words

The high-speed saturation converter for a color image according to claim 1, wherein the matrix coefficient calculating means is a gate array.

Claim 4

Dependent Claim 26 words

The high-speed saturation converter for a color image according to claim 1, wherein the matrix coefficient calculating means includes storing means for storing the matrix coefficients.

Claim 5

Dependent Claim 22 words

The high speed saturation converter for a color image according to claim 1, where the processor means is a central processing unit.

Claim 6

Dependent Claim 24 words

The high speed saturation converter for a color image according to claim 1, where the processor means includes means for storing the matrix coefficients.

Claim 7

Dependent Claim 38 words

The high speed saturation converter for a color image according to claim 1, further comprising a display connected to the second imaging memories for displaying data according to the R, G, B, components of the second image memories.

Claim 8

Dependent Claim 127 words

A converter for changing a saturation of color data representing three primary colors, comprising: means for providing r, g, and b data corresponding to the primary color data; means for generating changeable matrix parameters α and β by which the saturation is defined; and means for converting the r, g, and b data into r*, g* and b* data using a conversion matrix such that a color saturation of the r*, g*, and b* data can be changed independently of an intensity of the r*, g* and b* data according to said matrix parameters α and β, said conversion matrix being defined in the following relation; ##EQU11## where K in the above relation is a proportional constant defining the intensity of the r*, g* and b* data.

Claim 9

Dependent Claim 127 words

A converter for changing a saturation of color data representing three primary colors, comprising: means for providing r, g, and b data corresponding to the primary color data; means for generating changeable matrix parameters α and β by which the saturation is defined; and means for converting the r, g, and b data into r*, g* and b* data using a conversion matrix such that a color saturation of the r*, g*, and b* data can be changed independently of an intensity of the r*, g* and b* data according to said matrix parameters α and β, said conversion matrix being defined in the following relation; ##EQU11## where K in the above relation is a proportional constant defining the intensity of the r*, g* and b* data.

Claim 10

Dependent Claim 40 words

A converter according to claim 7, wherein said generating means includes: means responsive to a given color saturation parameter a, for calculating (2a+1) to provide said matrix parameter α; and means for calculating (1-a) to provide said matrix parameter β.

Claim 11

Dependent Claim 42 words

A converter according to claim 7, wherein the converting means includes means for setting the proportional constant K to substantially "1/3," so that the color saturation of the r*, g*, and b* data is changed while the intensity thereof is substantially fixed.

Claim 12

Dependent Claim 112 words

A converter for changing a hue of color data representing three primary colors, comprising: means for providing r, g, and b data corresponding to the color data; and means responsive to variable parameters K and θ, for converting the r, g, and b data into r*, g*, and b* data using a conversion matrix, such that a hue of the r*, g*, and b* data can be changed independently of an intensity of the r*, g* and b* data according to said parameter θ, said conversion matrix being defined in the following relation: ##EQU12## where the parameters K and θ define the intensity and hue of the r*, g*, and b*, respectively.

Claim 13

Dependent Claim 112 words

A converter for changing a hue of color data representing three primary colors, comprising: means for providing r, g, and b data corresponding to the color data; and means responsive to variable parameters K and θ, for converting the r, g, and b data into r*, g*, and b* data using a conversion matrix, such that a hue of the r*, g*, and b* data can be changed independently of an intensity of the r*, g* and b* data according to said parameter θ, said conversion matrix being defined in the following relation: ##EQU12## where the parameters K and θ define the intensity and hue of the r*, g*, and b*, respectively.

Claim 14

Dependent Claim 153 words

A color processor for controlling a color saturation of a composite color signal including a luminance signal Y, a color-difference signal (R-Y), and a color-difference signal (B-Y), comprising: means for converting an analog composite color signal into digital signals Y, (R-Y), and (B-Y); means responsive to variable parameters K and a, for converting the digital signals Y, (R-Y), and (B-Y) into digital signals Y*, (R-Y)*, and (B-Y)* using a conversion matrix, such that a saturation of a color signal produced from the signals Y*, (R-Y)* and (B-Y)* can be changed independently of an intensity of the color signal according to said parameter a, said conversion matrix being defined in the following relation: ##EQU13## where k1, k2, and k3 are predetermined coefficients, and the parameters K and a define the intensity and saturation of the color signal, respectively; and means for converting the signal Y*, (R-Y)*, and (B-Y)* into a processed composite color signal.

Claim 15

Dependent Claim 153 words

A color processor for controlling a color saturation of a composite color signal including a luminance signal Y, a color-difference signal (R-Y), and a color-difference signal (B-Y), comprising: means for converting an analog composite color signal into digital signals Y, (R-Y), and (B-Y); means responsive to variable parameters K and a, for converting the digital signals Y, (R-Y), and (B-Y) into digital signals Y*, (R-Y)*, and (B-Y)* using a conversion matrix, such that a saturation of a color signal produced from the signals Y*, (R-Y)* and (B-Y)* can be changed independently of an intensity of the color signal according to said parameter a, said conversion matrix being defined in the following relation: ##EQU13## where k1, k2, and k3 are predetermined coefficients, and the parameters K and a define the intensity and saturation of the color signal, respectively; and means for converting the signal Y*, (R-Y)*, and (B-Y)* into a processed composite color signal.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-05-23	1997-11-22	1998-05-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-05-23	2001-11-22	2002-05-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-05-23	2005-11-22	2006-05-24	$7700.00	Window Closed / Lapsed

High-speed color saturation converter for digital color data

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