Colour Models

Tristimulus Values, CIE xyY Colourspace and Chromaticity Coordinates

colour

XYZ_to_xyY(XYZ[, illuminant]) Converts from CIE XYZ tristimulus values to CIE xyY colourspace and reference illuminant.
xyY_to_XYZ(xyY) Converts from CIE xyY colourspace to CIE XYZ tristimulus values.
XYZ_to_xy(XYZ[, illuminant]) Returns the xy chromaticity coordinates from given CIE XYZ tristimulus values.
xy_to_XYZ(xy) Returns the CIE XYZ tristimulus values from given xy chromaticity coordinates.
xyY_to_xy(xyY) Converts from CIE xyY colourspace to xy chromaticity coordinates.
xy_to_xyY(xy[, Y]) Converts from xy chromaticity coordinates to CIE xyY colourspace by extending the array last dimension with \(Y\) Luminance.

CIE L*a*b* Colourspace

colour

XYZ_to_Lab(XYZ[, illuminant]) Converts from CIE XYZ tristimulus values to CIE L*a*b* colourspace.
Lab_to_XYZ(Lab[, illuminant]) Converts from CIE L*a*b* colourspace to CIE XYZ tristimulus values.
Lab_to_LCHab(Lab) Converts from CIE L*a*b* colourspace to CIE L*C*Hab colourspace.
LCHab_to_Lab(LCHab) Converts from CIE L*C*Hab colourspace to CIE L*a*b* colourspace.

CIE L*u*v* Colourspace

colour

XYZ_to_Luv(XYZ[, illuminant]) Converts from CIE XYZ tristimulus values to CIE L*u*v* colourspace.
Luv_to_XYZ(Luv[, illuminant]) Converts from CIE L*u*v* colourspace to CIE XYZ tristimulus values.
Luv_to_LCHuv(Luv) Converts from CIE L*u*v* colourspace to CIE L*C*Huv colourspace.
LCHuv_to_Luv(LCHuv) Converts from CIE L*C*Huv colourspace to CIE L*u*v* colourspace.
Luv_to_uv(Luv[, illuminant]) Returns the \(uv^p\) chromaticity coordinates from given CIE L*u*v* colourspace array.
Luv_uv_to_xy(uv) Returns the xy chromaticity coordinates from given CIE L*u*v* colourspace \(uv^p\) chromaticity coordinates.
xy_to_Luv_uv(xy) Returns the CIE L*u*v* colourspace \(uv^p\) chromaticity coordinates from given xy chromaticity coordinates.

CIE 1960 UCS Colourspace

colour

XYZ_to_UCS(XYZ) Converts from CIE XYZ tristimulus values to CIE 1960 UCS colourspace.
UCS_to_XYZ(UVW) Converts from CIE 1960 UCS colourspace to CIE XYZ tristimulus values.
UCS_to_uv(UVW) Returns the uv chromaticity coordinates from given CIE 1960 UCS colourspace array.
UCS_uv_to_xy(uv) Returns the xy chromaticity coordinates from given CIE 1960 UCS colourspace uv chromaticity coordinates.
xy_to_UCS_uv(xy) Returns the CIE 1960 UCS colourspace uv chromaticity coordinates from given xy chromaticity coordinates.

CIE 1964 U*V*W* Colourspace

colour

XYZ_to_UVW(XYZ[, illuminant]) Converts from CIE XYZ tristimulus values to CIE 1964 U*V*W* colourspace.
UVW_to_XYZ(UVW[, illuminant]) Converts CIE 1964 U*V*W* colourspace to CIE XYZ tristimulus values.

Hunter L,a,b Colour Scale

colour

XYZ_to_Hunter_Lab(XYZ[, XYZ_n, K_ab]) Converts from CIE XYZ tristimulus values to Hunter L,a,b colour scale.
Hunter_Lab_to_XYZ(Lab[, XYZ_n, K_ab]) Converts from Hunter L,a,b colour scale to CIE XYZ tristimulus values.
XYZ_to_K_ab_HunterLab1966(XYZ) Converts from whitepoint CIE XYZ tristimulus values to Hunter L,a,b \(K_{a}\) and \(K_{b}\) chromaticity coefficients.

Hunter Rd,a,b Colour Scale

colour

XYZ_to_Hunter_Rdab(XYZ[, XYZ_n, K_ab]) Converts from CIE XYZ tristimulus values to Hunter Rd,a,b colour scale.
Hunter_Rdab_to_XYZ(R_d_ab[, XYZ_n, K_ab]) Converts from Hunter Rd,a,b colour scale to CIE XYZ tristimulus values.

DIN99 Colourspace

colour

Lab_to_DIN99(Lab[, k_E, k_CH]) Converts from CIE L*a*b* colourspace to DIN99 colourspace.
DIN99_to_Lab(Lab_99[, k_E, k_CH]) Converts from DIN99 colourspace to CIE L*a*b* colourspace.

CAM02-LCD, CAM02-SCD, and CAM02-UCS Colourspaces - Luo, Cui and Li (2006)

colour

JMh_CIECAM02_to_CAM02LCD(JMh) Converts from CIECAM02 \(JMh\) correlates array to Luo et al.(2006) CAM02-LCD colourspace \(J'a'b'\) array..
CAM02LCD_to_JMh_CIECAM02(Jpapbp) Converts from Luo et al.(2006) CAM02-LCD colourspace \(J'a'b'\) array to CIECAM02 \(JMh\) correlates array..
JMh_CIECAM02_to_CAM02SCD(JMh) Converts from CIECAM02 \(JMh\) correlates array to Luo et al.(2006) CAM02-SCD colourspace \(J'a'b'\) array..
CAM02SCD_to_JMh_CIECAM02(Jpapbp) Converts from Luo et al.(2006) CAM02-SCD colourspace \(J'a'b'\) array to CIECAM02 \(JMh\) correlates array..
JMh_CIECAM02_to_CAM02UCS(JMh) Converts from CIECAM02 \(JMh\) correlates array to Luo et al.(2006) CAM02-UCS colourspace \(J'a'b'\) array..
CAM02UCS_to_JMh_CIECAM02(Jpapbp) Converts from Luo et al.(2006) CAM02-UCS colourspace \(J'a'b'\) array to CIECAM02 \(JMh\) correlates array..

CAM16-LCD, CAM16-SCD, and CAM16-UCS Colourspaces - Li et al. (2017)

colour

JMh_CAM16_to_CAM16LCD(JMh) Converts from CAM16 \(JMh\) correlates array to Li et al.(2017) CAM16-LCD colourspace \(J'a'b'\) array..
CAM16LCD_to_JMh_CAM16(Jpapbp) Converts from Li et al.(2017) CAM16-LCD colourspace \(J'a'b'\) array to CAM16 \(JMh\) correlates array..
JMh_CAM16_to_CAM16SCD(JMh) Converts from CAM16 \(JMh\) correlates array to Li et al.(2017) CAM16-SCD colourspace \(J'a'b'\) array..
CAM16SCD_to_JMh_CAM16(Jpapbp) Converts from Li et al.(2017) CAM16-SCD colourspace \(J'a'b'\) array to CAM16 \(JMh\) correlates array..
JMh_CAM16_to_CAM16UCS(JMh) Converts from CAM16 \(JMh\) correlates array to Li et al.(2017) CAM16-UCS colourspace \(J'a'b'\) array..
CAM16UCS_to_JMh_CAM16(Jpapbp) Converts from Li et al.(2017) CAM16-UCS colourspace \(J'a'b'\) array to CAM16 \(JMh\) correlates array..

IPT Colourspace

colour

XYZ_to_IPT(XYZ) Converts from CIE XYZ tristimulus values to IPT colourspace.
IPT_to_XYZ(IPT) Converts from IPT colourspace to CIE XYZ tristimulus values.
IPT_hue_angle(IPT) Computes the hue angle in degrees from IPT colourspace.

hdr-CIELAB Colourspace

colour

XYZ_to_hdr_CIELab(XYZ[, illuminant, Y_s, …]) Converts from CIE XYZ tristimulus values to hdr-CIELAB colourspace.
hdr_CIELab_to_XYZ(Lab_hdr[, illuminant, …]) Converts from hdr-CIELAB colourspace to CIE XYZ tristimulus values.
HDR_CIELAB_METHODS Supported hdr-CIELAB colourspace computation methods.

hdr-IPT Colourspace

colour

XYZ_to_hdr_IPT(XYZ[, Y_s, Y_abs, method]) Converts from CIE XYZ tristimulus values to hdr-IPT colourspace.
hdr_IPT_to_XYZ(IPT_hdr[, Y_s, Y_abs, method]) Converts from hdr-IPT colourspace to CIE XYZ tristimulus values.
HDR_IPT_METHODS Supported hdr-IPT colourspace computation methods.

OSA UCS Colourspace

colour

XYZ_to_OSA_UCS(XYZ) Converts from CIE XYZ tristimulus values under the CIE 1964 10 Degree Standard Observer to OSA UCS colourspace.
OSA_UCS_to_XYZ(Ljg[, optimisation_parameters]) Converts from OSA UCS colourspace to CIE XYZ tristimulus values under the CIE 1964 10 Degree Standard Observer.

\(JzAzBz\) Colourspace

colour

XYZ_to_JzAzBz(XYZ_D65[, constants]) Converts from CIE XYZ tristimulus values to \(J_zA_zB_z\) colourspace.
JzAzBz_to_XYZ(JzAzBz[, constants]) Converts from \(J_zA_zB_z\) colourspace to CIE XYZ tristimulus values.

RGB Colourspace and Transformations

colour

XYZ_to_RGB(XYZ, illuminant_XYZ, …[, …]) Converts from CIE XYZ tristimulus values to RGB colourspace array.
RGB_to_XYZ(RGB, illuminant_RGB, …[, …]) Converts given RGB colourspace array to CIE XYZ tristimulus values.
RGB_to_RGB(RGB, input_colourspace, …[, …]) Converts given RGB colourspace array from given input RGB colourspace to output RGB colourspace using given chromatic adaptation method.
RGB_to_RGB_matrix(input_colourspace, …[, …]) Computes the matrix \(M\) converting from given input RGB colourspace to output RGB colourspace using given chromatic adaptation method.

Ancillary Objects

colour

XYZ_to_sRGB(XYZ[, illuminant, …]) Converts from CIE XYZ tristimulus values to sRGB colourspace.
sRGB_to_XYZ(RGB[, illuminant, …]) Converts from sRGB colourspace to CIE XYZ tristimulus values.

RGB Colourspace Derivation

colour

normalised_primary_matrix(primaries, whitepoint) Returns the normalised primary matrix using given primaries and whitepoint \(xy\) chromaticity coordinates.
chromatically_adapted_primaries(primaries, …) Chromatically adapts given primaries \(xy\) chromaticity coordinates from test whitepoint_t to reference whitepoint_r.
primaries_whitepoint(npm) Returns the primaries and whitepoint \(xy\) chromaticity coordinates using given normalised primary matrix.
RGB_luminance(RGB, primaries, whitepoint) Returns the luminance \(Y\) of given RGB components from given primaries and whitepoint.
RGB_luminance_equation(primaries, whitepoint) Returns the luminance equation from given primaries and whitepoint.

RGB Colourspaces

colour

RGB_Colourspace(name, primaries, whitepoint) Implements support for the RGB colourspaces dataset from colour.models.dataset.aces_rgb, etc….
RGB_COLOURSPACES Aggregated RGB colourspaces.

colour.models

ACES_2065_1_COLOURSPACE ACES2065-1 colourspace, base encoding, used for exchange of full fidelity images and archiving.
ACES_CC_COLOURSPACE ACEScc colourspace, a working space for color correctors, target for ASC-CDL values created on-set.
ACES_CCT_COLOURSPACE ACEScct colourspace, an alternative working space for colour correctors, intended to be transient and internal to software or hardware systems, and is specifically not intended for interchange or archiving.
ACES_PROXY_COLOURSPACE ACESproxy colourspace, a lightweight encoding for transmission over HD-SDI (or other production transmission schemes), onset look management.
ACES_CG_COLOURSPACE ACEScg colourspace, a working space for paint/compositor applications that don’t support ACES2065-1 or ACEScc.
ADOBE_RGB_1998_COLOURSPACE Adobe RGB (1998) colourspace.
ADOBE_WIDE_GAMUT_RGB_COLOURSPACE Adobe Wide Gamut RGB colourspace.
ALEXA_WIDE_GAMUT_COLOURSPACE ALEXA Wide Gamut colourspace.
APPLE_RGB_COLOURSPACE Apple RGB colourspace.
BEST_RGB_COLOURSPACE Best RGB colourspace.
BETA_RGB_COLOURSPACE Beta RGB colourspace.
BT470_525_COLOURSPACE ITU-R BT.470 - 525 colourspace.
BT470_625_COLOURSPACE ITU-R BT.470 - 625 colourspace.
BT709_COLOURSPACE ITU-R BT.709 colourspace.
BT2020_COLOURSPACE ITU-R BT.2020 colourspace.
CIE_RGB_COLOURSPACE CIE RGB colourspace.
CINEMA_GAMUT_COLOURSPACE Cinema Gamut colourspace.
COLOR_MATCH_RGB_COLOURSPACE ColorMatch RGB colourspace.
DCDM_XYZ_COLOURSPACE DCDM XYZ colourspace.
DCI_P3_COLOURSPACE DCI-P3 colourspace.
DCI_P3_P_COLOURSPACE DCI-P3+ colourspace.
DON_RGB_4_COLOURSPACE Don RGB 4 colourspace.
ECI_RGB_V2_COLOURSPACE ECI RGB v2 colourspace.
EKTA_SPACE_PS_5_COLOURSPACE Ekta Space PS 5 colourspace.
PROTUNE_NATIVE_COLOURSPACE Protune Native colourspace.
MAX_RGB_COLOURSPACE Max RGB colourspace.
NTSC_COLOURSPACE NTSC colourspace.
P3_D65_COLOURSPACE P3-D65 colourspace.
PAL_SECAM_COLOURSPACE Pal/Secam colourspace.
RED_COLOR_COLOURSPACE REDcolor colourspace.
RED_COLOR_2_COLOURSPACE REDcolor2 colourspace.
RED_COLOR_3_COLOURSPACE REDcolor3 colourspace.
RED_COLOR_4_COLOURSPACE REDcolor4 colourspace.
RED_WIDE_GAMUT_RGB_COLOURSPACE REDWideGamutRGB colourspace.
DRAGON_COLOR_COLOURSPACE DRAGONcolor colourspace.
DRAGON_COLOR_2_COLOURSPACE DRAGONcolor2 colourspace.
ROMM_RGB_COLOURSPACE ROMM RGB colourspace.
RIMM_RGB_COLOURSPACE RIMM RGB colourspace.
ERIMM_RGB_COLOURSPACE ERIMM RGB colourspace.
PROPHOTO_RGB_COLOURSPACE ProPhoto RGB colourspace, an alias colourspace for ROMM RGB.
RUSSELL_RGB_COLOURSPACE Russell RGB colourspace.
SMPTE_240M_COLOURSPACE SMPTE 240M colourspace.
S_GAMUT_COLOURSPACE S-Gamut colourspace.
S_GAMUT3_COLOURSPACE S-Gamut3 colourspace.
S_GAMUT3_CINE_COLOURSPACE S-Gamut3.Cine colourspace.
sRGB_COLOURSPACE sRGB colourspace.
V_GAMUT_COLOURSPACE V-Gamut colourspace.
XTREME_RGB_COLOURSPACE Xtreme RGB colourspace.

Ancillary Objects

colour.models

spectral_to_aces_relative_exposure_values(spd) Converts given spectral power distribution to ACES2065-1 colourspace relative exposure values.
ACES_RICD Implements support for the CIE RGB colour matching functions.

Colour Component Transfer Functions

colour

encoding_cctf(value[, function]) Encodes linear \(RGB\) values to non linear \(R'G'B'\) values using given encoding colour component transfer function (Encoding CCTF).
ENCODING_CCTFS Supported encoding colour component transfer functions (Encoding CCTFs), a collection of the functions defined by colour.LOG_ENCODING_CURVES, colour.OETFS, colour.EOTFS_REVERSE attributes and 3 gamma encoding functions (1 / 2.2, 1 / 2.4, 1 / 2.6).
decoding_cctf(value[, function]) Decodes non-linear \(R'G'B'\) values to linear \(RGB\) values using given decoding colour component transfer function (Decoding CCTF).
DECODING_CCTFS Supported decoding colour component transfer functions (Decoding CCTFs), a collection of the functions defined by colour.LOG_DECODING_CURVES, colour.EOTFS, colour.OETFS_REVERSE attributes and 3 gamma decoding functions (2.2, 2.4, 2.6).

Opto-Electronic Transfer Functions

colour

oetf(value[, function]) Encodes estimated tristimulus values in a scene to \(R'G'B'\) video component signal value using given opto-electronic transfer function (OETF / OECF).
OETFS Supported opto-electrical transfer functions (OETFs / OECFs).
oetf_reverse(value[, function]) Decodes \(R'G'B'\) video component signal value to tristimulus values at the display using given reverse opto-electronic transfer function (OETF / OECF).
OETFS_REVERSE Supported reverse opto-electrical transfer functions (OETFs / OECFs).

colour.models

oetf_ARIBSTDB67(E[, r, constants]) Defines ARIB STD-B67 (Hybrid Log-Gamma) opto-electrical transfer function (OETF / OECF).
oetf_reverse_ARIBSTDB67(E_p[, r, constants]) Defines ARIB STD-B67 (Hybrid Log-Gamma) reverse opto-electrical transfer function (OETF / OECF).
oetf_DCDM(XYZ[, out_int]) Defines the DCDM opto-electronic transfer function (OETF / OECF).
oetf_DICOMGSDF(L[, out_int]) Defines the DICOM - Grayscale Standard Display Function opto-electronic transfer function (OETF / OECF).
oetf_BT2020(E[, is_12_bits_system, constants]) Defines Recommendation ITU-R BT.2020 opto-electrical transfer function (OETF / OECF).
oetf_BT2100_HLG(E) Defines Recommendation ITU-R BT.2100 Reference HLG opto-electrical transfer function (OETF / OECF).
oetf_reverse_BT2100_HLG(E) Defines Recommendation ITU-R BT.2100 Reference HLG reverse opto-electrical transfer function (OETF / OECF).
oetf_BT2100_PQ(E) Defines Recommendation ITU-R BT.2100 Reference PQ opto-electrical transfer function (OETF / OECF).
oetf_reverse_BT2100_PQ(E_p) Defines Recommendation ITU-R BT.2100 Reference PQ reverse opto-electrical transfer function (OETF / OECF).
oetf_BT601(L) Defines Recommendation ITU-R BT.601-7 opto-electronic transfer function (OETF / OECF).
oetf_reverse_BT601(E) Defines Recommendation ITU-R BT.601-7 reverse opto-electronic transfer function (OETF / OECF).
oetf_BT709(L) Defines Recommendation ITU-R BT.709-6 opto-electronic transfer function (OETF / OECF).
oetf_reverse_BT709(V) Defines Recommendation ITU-R BT.709-6 reverse opto-electronic transfer function (OETF / OECF).
oetf_ProPhotoRGB(X[, bit_depth, out_int]) Defines the ROMM RGB encoding opto-electronic transfer function (OETF / OECF).
oetf_RIMMRGB(X[, bit_depth, out_int, E_clip]) Defines the RIMM RGB encoding opto-electronic transfer function (OETF / OECF).
oetf_ROMMRGB(X[, bit_depth, out_int]) Defines the ROMM RGB encoding opto-electronic transfer function (OETF / OECF).
oetf_SMPTE240M(L_c) Defines SMPTE 240M opto-electrical transfer function (OETF / OECF).
oetf_ST2084(C[, L_p, constants]) Defines SMPTE ST 2084:2014 optimised perceptual opto-electronic transfer function (OETF / OECF).
oetf_sRGB(L) Defines the sRGB colourspace opto-electronic transfer function (OETF / OECF).
oetf_reverse_sRGB(V) Defines the sRGB colourspace reverse opto-electronic transfer function (OETF / OECF).

Ancillary Objects

colour

function_gamma(a[, exponent, …]) Defines a typical gamma encoding / decoding function.
function_linear(a) Defines a typical linear encoding / decoding function, essentially a pass-through function.

Electro-Optical Transfer Functions

colour

eotf(value[, function]) Decodes \(R'G'B'\) video component signal value to tristimulus values at the display using given electro-optical transfer function (EOTF / EOCF).
EOTFS Supported electro-optical transfer functions (EOTFs / EOCFs).
eotf_reverse(value[, function]) Encodes estimated tristimulus values in a scene to \(R'G'B'\) video component signal value using given reverse electro-optical transfer function (EOTF / EOCF).
EOTFS_REVERSE Supported reverse electro-optical transfer functions (EOTFs / EOCFs).

colour.models

eotf_DCDM(XYZ_p[, in_int]) Defines the DCDM electro-optical transfer function (EOTF / EOCF).
eotf_DICOMGSDF(J[, in_int]) Defines the DICOM - Grayscale Standard Display Function electro-optical transfer function (EOTF / EOCF).
eotf_BT1886(V[, L_B, L_W]) Defines Recommendation ITU-R BT.1886 electro-optical transfer function (EOTF / EOCF).
eotf_reverse_BT1886(L[, L_B, L_W]) Defines Recommendation ITU-R BT.1886 reverse electro-optical transfer function (EOTF / EOCF).
eotf_BT2020(E_p[, is_12_bits_system, constants]) Defines Recommendation ITU-R BT.2020 electro-optical transfer function (EOTF / EOCF).
eotf_BT2100_HLG(E_p[, L_B, L_W, gamma]) Defines Recommendation ITU-R BT.2100 Reference HLG electro-optical transfer function (EOTF / EOCF).
eotf_reverse_BT2100_HLG(F_D[, L_B, L_W, gamma]) Defines Recommendation ITU-R BT.2100 Reference HLG reverse electro-optical transfer function (EOTF / EOCF).
eotf_BT2100_PQ(E_p) Defines Recommendation ITU-R BT.2100 Reference PQ electro-optical transfer function (EOTF / EOCF).
eotf_reverse_BT2100_PQ(F_D) Defines Recommendation ITU-R BT.2100 Reference PQ reverse electro-optical transfer function (EOTF / EOCF).
eotf_ProPhotoRGB(X_p[, bit_depth, in_int]) Defines the ROMM RGB encoding electro-optical transfer function (EOTF / EOCF).
eotf_RIMMRGB(X_p[, bit_depth, in_int, E_clip]) Defines the RIMM RGB encoding electro-optical transfer function (EOTF / EOCF).
eotf_ROMMRGB(X_p[, bit_depth, in_int]) Defines the ROMM RGB encoding electro-optical transfer function (EOTF / EOCF).
eotf_SMPTE240M(V_r) Defines SMPTE 240M electro-optical transfer function (EOTF / EOCF).
eotf_ST2084(N[, L_p, constants]) Defines SMPTE ST 2084:2014 optimised perceptual electro-optical transfer function (EOTF / EOCF).

Opto-Optical Transfer Functions

colour

ootf(value[, function]) Maps relative scene linear light to display linear light using given opto-optical transfer function (OOTF / OOCF).
OOTFS Supported opto-optical transfer functions (OOTFs / OOCFs).
ootf_reverse(value[, function]) Maps relative display linear light to scene linear light using given reverse opto-optical transfer function (OOTF / OOCF).
OOTFS_REVERSE Supported reverse opto-optical transfer functions (OOTFs / OOCFs).

colour.models

ootf_BT2100_HLG(E[, L_B, L_W, gamma]) Defines Recommendation ITU-R BT.2100 Reference HLG opto-optical transfer function (OOTF / OOCF).
ootf_reverse_BT2100_HLG(F_D[, L_B, L_W, gamma]) Defines Recommendation ITU-R BT.2100 Reference HLG reverse opto-optical transfer function (OOTF / OOCF).
ootf_BT2100_PQ(E) Defines Recommendation ITU-R BT.2100 Reference PQ opto-optical transfer function (OOTF / OOCF).
ootf_reverse_BT2100_PQ(F_D) Defines Recommendation ITU-R BT.2100 Reference PQ reverse opto-optical transfer function (OOTF / OOCF).

Log Encoding and Decoding Curves

colour

log_encoding_curve(value[, curve]) Encodes linear-light values to \(R'G'B'\) video component signal value using given log curve.
LOG_ENCODING_CURVES Supported log encoding curves.
log_decoding_curve(value[, curve]) Decodes \(R'G'B'\) video component signal value to linear-light values using given log curve.
LOG_DECODING_CURVES Supported log decoding curves.

colour.models

log_encoding_ACEScc(lin_AP1) Defines the ACEScc colourspace log encoding / opto-electronic transfer function.
log_decoding_ACEScc(ACEScc) Defines the ACEScc colourspace log decoding / electro-optical transfer function.
log_encoding_ACEScct(lin_AP1[, constants]) Defines the ACEScct colourspace log encoding / opto-electronic transfer function.
log_decoding_ACEScct(ACEScct[, constants]) Defines the ACEScct colourspace log decoding / electro-optical transfer function.
log_encoding_ACESproxy(lin_AP1[, bit_depth, …]) Defines the ACESproxy colourspace log encoding curve / opto-electronic transfer function.
log_decoding_ACESproxy(ACESproxy[, …]) Defines the ACESproxy colourspace log decoding curve / electro-optical transfer function.
log_encoding_ALEXALogC(x[, firmware, method, EI]) Defines the ALEXA Log C log encoding curve / opto-electronic transfer function.
log_decoding_ALEXALogC(t[, firmware, method, EI]) Defines the ALEXA Log C log decoding curve / electro-optical transfer function.
log_encoding_CanonLog2(x[, bit_depth, …]) Defines the Canon Log 2 log encoding curve / opto-electronic transfer function.
log_decoding_CanonLog2(clog2[, bit_depth, …]) Defines the Canon Log 2 log decoding curve / electro-optical transfer function.
log_encoding_CanonLog3(x[, bit_depth, …]) Defines the Canon Log 3 log encoding curve / opto-electronic transfer function.
log_decoding_CanonLog3(clog3[, bit_depth, …]) Defines the Canon Log 3 log decoding curve / electro-optical transfer function.
log_encoding_CanonLog(x[, bit_depth, …]) Defines the Canon Log log encoding curve / opto-electronic transfer function.
log_decoding_CanonLog(clog[, bit_depth, …]) Defines the Canon Log log decoding curve / electro-optical transfer function.
log_encoding_Cineon(x[, black_offset]) Defines the Cineon log encoding curve / opto-electronic transfer function.
log_decoding_Cineon(y[, black_offset]) Defines the Cineon log decoding curve / electro-optical transfer function.
log_encoding_ERIMMRGB(X[, bit_depth, …]) Defines the ERIMM RGB log encoding curve / opto-electronic transfer function (OETF / OECF).
log_decoding_ERIMMRGB(X_p[, bit_depth, …]) Defines the ERIMM RGB log decoding curve / electro-optical transfer function (EOTF / EOCF).
log_encoding_Log3G10(x[, legacy_curve]) Defines the Log3G10 log encoding curve / opto-electronic transfer function.
log_decoding_Log3G10(y[, legacy_curve]) Defines the Log3G10 log decoding curve / electro-optical transfer function.
log_encoding_Log3G12(x) Defines the Log3G12 log encoding curve / opto-electronic transfer function.
log_decoding_Log3G12(y) Defines the Log3G12 log decoding curve / electro-optical transfer function.
log_encoding_Panalog(x[, black_offset]) Defines the Panalog log encoding curve / opto-electronic transfer function.
log_decoding_Panalog(y[, black_offset]) Defines the Panalog log decoding curve / electro-optical transfer function.
log_encoding_PivotedLog(x[, log_reference, …]) Defines the Josh Pines style Pivoted Log log encoding curve / opto-electronic transfer function.
log_decoding_PivotedLog(y[, log_reference, …]) Defines the Josh Pines style Pivoted Log log decoding curve / electro-optical transfer function.
log_encoding_Protune(x) Defines the Protune log encoding curve / opto-electronic transfer function.
log_decoding_Protune(y) Defines the Protune log decoding curve / electro-optical transfer function.
log_encoding_REDLog(x[, black_offset]) Defines the REDLog log encoding curve / opto-electronic transfer function.
log_decoding_REDLog(y[, black_offset]) Defines the REDLog log decoding curve / electro-optical transfer function.
log_encoding_REDLogFilm(x[, black_offset]) Defines the REDLogFilm log encoding curve / opto-electronic transfer function.
log_decoding_REDLogFilm(y[, black_offset]) Defines the REDLogFilm log decoding curve / electro-optical transfer function.
log_encoding_SLog(x[, bit_depth, out_legal, …]) Defines the Sony S-Log log encoding curve / opto-electronic transfer function.
log_decoding_SLog(y[, bit_depth, in_legal, …]) Defines the Sony S-Log log decoding curve / electro-optical transfer function.
log_encoding_SLog2(x[, bit_depth, …]) Defines the Sony S-Log2 log encoding curve / opto-electronic transfer function.
log_decoding_SLog2(y[, bit_depth, in_legal, …]) Defines the Sony S-Log2 log decoding curve / electro-optical transfer function.
log_encoding_SLog3(x[, bit_depth, …]) Defines the Sony S-Log3 log encoding curve / opto-electronic transfer function.
log_decoding_SLog3(y[, bit_depth, in_legal, …]) Defines the Sony S-Log3 log decoding curve / electro-optical transfer function.
log_encoding_VLog(L_in[, bit_depth, …]) Defines the Panasonic V-Log log encoding curve / opto-electronic transfer function.
log_decoding_VLog(V_out[, bit_depth, …]) Defines the Panasonic V-Log log decoding curve / electro-optical transfer function.
log_encoding_ViperLog(x) Defines the Viper Log log encoding curve / opto-electronic transfer function.
log_decoding_ViperLog(y) Defines the Viper Log log decoding curve / electro-optical transfer function.

Colour Encodings

Y’CbCr Colour Encoding

colour

RGB_to_YCbCr(RGB[, K, in_bits, in_legal, …]) Converts an array of R’G’B’ values to the corresponding Y’CbCr colour encoding values array.
YCbCr_to_RGB(YCbCr[, K, in_bits, in_legal, …]) Converts an array of Y’CbCr colour encoding values to the corresponding R’G’B’ values array.
YCBCR_WEIGHTS Implements a case-insensitive mutable mapping / dict object.
RGB_to_YcCbcCrc(RGB[, out_bits, out_legal, …]) Converts an array of RGB linear values to the corresponding Yc’Cbc’Crc’ colour encoding values array.
YcCbcCrc_to_RGB(YcCbcCrc[, in_bits, …]) Converts an array of Yc’Cbc’Crc’ colour encoding values to the corresponding RGB array of linear values.

Ancillary Objects

colour

full_to_legal(CV[, bit_depth, in_int, out_int]) Converts given code value \(CV\) or float equivalent of a code value at a given bit depth from full range (full swing) to legal range (studio swing).
legal_to_full(CV[, bit_depth, in_int, out_int]) Converts given code value \(CV\) or float equivalent of a code value at a given bit depth from legal range (studio swing) to full range (full swing).
CV_range([bit_depth, is_legal, is_int]) Returns the code value \(CV\) range for given bit depth, range legality and representation.

YCoCg Colour Encoding

colour

RGB_to_YCoCg(RGB) Converts an array of R’G’B’ values to the corresponding YCoCg colour encoding values array.
YCoCg_to_RGB(YCoCg) Converts an array of YCoCg colour encoding values to the corresponding R’G’B’ values array.

\(IC_TC_P\) Colour Encoding

colour

RGB_to_ICTCP(RGB[, L_p]) Converts from ITU-R BT.2020 colourspace to \(IC_TC_P\) colour encoding.
ICTCP_to_RGB(ICTCP[, L_p]) Converts from \(IC_TC_P\) colour encoding to ITU-R BT.2020 colourspace.

RGB Representations

Prismatic Colourspace

colour

RGB_to_Prismatic(RGB) Converts from RGB colourspace to Prismatic \(L\rho\gamma\beta\) colourspace array.
Prismatic_to_RGB(Lrgb) Converts from Prismatic \(L\rho\gamma\beta\) colourspace array to RGB colourspace.

HSV Colourspace

colour

RGB_to_HSV(RGB) Converts from RGB colourspace to HSV colourspace.
HSV_to_RGB(HSV) Converts from HSV colourspace to RGB colourspace.

HSL Colourspace

colour

RGB_to_HSL(RGB) Converts from RGB colourspace to HSL colourspace.
HSL_to_RGB(HSL) Converts from HSL colourspace to RGB colourspace.

CMY Colourspace

colour

RGB_to_CMY(RGB) Converts from RGB colourspace to CMY colourspace.
CMY_to_RGB(CMY) Converts from CMY colourspace to CMY colourspace.
CMY_to_CMYK(CMY) Converts from CMY colourspace to CMYK colourspace.
CMYK_to_CMY(CMYK) Converts from CMYK colourspace to CMY colourspace.