Package 'ColorNameR'

Title: Give Colors a Name
Description: A tool for transforming coordinates in a color space to common color names using data from the Royal Horticultural Society and the International Union for the Protection of New Varieties of Plants.
Authors: Marco Sánchez Beeckman [aut, cre]
Maintainer: Marco Sánchez Beeckman <[email protected]>
License: MIT + file LICENSE
Version: 0.1.0
Built: 2024-11-08 03:11:50 UTC
Source: https://github.com/msanchez-beeckman/colornamer

Help Index

Get the CIE76 color difference between two CIELab values.

Description

Get the CIE76 color difference between two CIELab values.

Usage

cie76(lab_color1, lab_color2)

Arguments

lab_color1

A vector with three components corresponding to a Lab value.
lab_color2

A vector with three components corresponding to another Lab value.

Value

The CIE76 color difference between the two given values.

References

Sharma, G., & Bala, R. (Eds.). (2017). Digital color imaging handbook. CRC press.

Get the CIE94 color difference between two CIELab values.

Description

Get the CIE94 color difference between two CIELab values.

Usage

cie94(
  lab_color1,
  lab_color2,
  k_L = 1,
  k_C = 1,
  k_H = 1,
  K1 = 0.045,
  K2 = 0.015,
  symmetric = FALSE
)

Arguments

lab_color1

A vector with three components corresponding to a Lab value.
lab_color2

A vector with three components corresponding to another Lab value.
k_L

Weighting factor for the L component.
k_C

Weighting factor for the C component.
k_H

Weighting factor for the H component.
K1

Application dependent weighting factor.
K2

Application dependent weighting factor.
symmetric

If TRUE, use the symmetric version of the formula.

Value

The CIE94 color difference between the two given values.

References

Sharma, G., & Bala, R. (Eds.). (2017). Digital color imaging handbook. CRC press.

Get the CIEDE2000 color difference between two CIELab values.

Description

Get the CIEDE2000 color difference between two CIELab values.

Usage

ciede2000(lab_color1, lab_color2, k_L = 1, k_C = 1, k_H = 1)

Arguments

lab_color1

A vector with three components corresponding to a Lab value.
lab_color2

A vector with three components corresponding to another Lab value.
k_L

Weighting factor for the L component.
k_C

Weighting factor for the C component.
k_H

Weighting factor for the H component.

Value

The CIEDE2000 color difference between the two given values.

References

Sharma, G., Wu, W., & Dalal, E. N. (2005). The CIEDE2000 color-difference formula: Implementation notes, supplementary test data, and mathematical observations. Color Research & Application: Endorsed by Inter-Society Color Council, The Colour Group (Great Britain), Canadian Society for Color, Color Science Association of Japan, Dutch Society for the Study of Color, The Swedish Colour Centre Foundation, Colour Society of Australia, Centre Français de la Couleur, 30(1), 21-30.

Get the color difference between values in the CIELab color space.

Description

Get the color difference between values in the CIELab color space.

Usage

colordiff(color, reference, metric = "CIEDE2000", ...)

Arguments

color

A matrix whose rows specify color coordinates in the CIELab color space.
reference

A reference color.
metric

The color metric, between CIE76, CIE94, and CIEDE2000.
...

Weighting factors k_L, k_C, k_H, K1, and/or K2 for CIE94 and CIEDE2000, if applicable. Also, symmetric=TRUE to use a symmetric version of CIE94.

Value

The color difference between the two given values.

References

Sharma, G., & Bala, R. (Eds.). (2017). Digital color imaging handbook. CRC press. Sharma, G., Wu, W., & Dalal, E. N. (2005). The CIEDE2000 color-difference formula: Implementation notes, supplementary test data, and mathematical observations. Color Research & Application: Endorsed by Inter-Society Color Council, The Colour Group (Great Britain), Canadian Society for Color, Color Science Association of Japan, Dutch Society for the Study of Color, The Swedish Colour Centre Foundation, Colour Society of Australia, Centre Français de la Couleur, 30(1), 21-30.

Examples

colordiff(rbind(c(50, 2.6772, -79.7751),
                c(50, 3.1571, -77.2803),
                c(50, 2.8361, -74.0200)), c(50, 0, -82.7485))
colordiff(rbind(c(50, 2.6772, -79.7751),
                c(50, 3.1571, -77.2803),
                c(50, 2.8361, -74.0200)), c(50, 0, -82.7485), metric="CIE94")
colordiff(rbind(c(50, 2.6772, -79.7751),
                c(50, 3.1571, -77.2803),
                c(50, 2.8361, -74.0200)), c(50, 0, -82.7485), metric="CIE94", symmetric=TRUE)

Get information about the closest RHS color to some CIELab coordinates.

Description

Get information about the closest RHS color to some CIELab coordinates.

Usage

get_closest_color(L, a, b, metric = "CIEDE2000")

Arguments

L

The lightness L* of the color.
a

The chromatic component a* (red-green).
b

The chromatic component b* (blue-yellow).
metric

The color distance to use.

Value

A one-row tibble.

Examples

get_closest_color(65, 20, -20)

Name a color given its coordinates in a specified color space.

Description

Name a color given its coordinates in a specified color space.

Usage

name(color, colorspace = "Lab", illuminant = NULL, language = "english")

Arguments

color

A matrix whose rows specify colors.
colorspace

The color space the coordinates of the colors are in.
illuminant

The reference white, or NULL if not needed.
language

The language of the color name, between English, French, German, and Spanish.

Details

The available color spaces are "XYZ", "sRGB", "Apple RGB", "CIE RGB", "Luv", and "Lab" (default). If the color space is an RGB variant, the coordinates must take values between 0 and 1.

Value

The name of the color, according to the UPOV.

Examples

name(c(65, 20, -20))
name(c(65, 20, -20), language="Spanish")
name(c(65, 20, -20), language="es")
name(c(244/255, 234/255, 184/255), colorspace="sRGB")
name(rbind(c(65, 20, -20), c(69, 4, -31)))

UPOV names and groups for RHS colors.

Description

Data set containing English, French, German, and Spanish names for the colors defined by the RHS in its sixth edition (2015), alongside their UPOV group number.

Usage

rhs_color_names_2015

Format

A data frame with 920 rows and 10 variables:

UPOVGroup

the UPOV group of the color

RHS

the RHS code of the color

english

the English name for the color

french

the French name for the color

german

the German name for the color

spanish

the Spanish name for the color

Source

UPOV https://www.upov.int/meetings/en/doc_details.jsp?meeting_id=50790&doc_id=426293

RHS colors in different color spaces.

Description

Data set containing the coordinates in RGB, CIELab, and CIELCh of the colors defined by the Royal Horticultural Society in its fifth edition (2007).

Usage

rhs_color_values_2007

Format

A data frame with 892 rows and 10 variables:

RHS

the RHS code of the color

R

the red component in sRGB

G

the green component in sRGB

B

the blue component in sRGB

L

the lightness component in CIELab (D65 / 10º)

a

the red-green component in CIELab (D65 / 10º)

b

the blue-yellow component in CIELab (D65 / 10º)

L2

the lightness component in CIELCh (D65 / 10º)

C

the colorfulness component in CIELCh (D65 / 10º)

h

the hue in CIELCh (D65 / 10º)

Source

http://rhscf.orgfree.com/