Colour difference formulae, colour pairs with Extra large colour differences (ELCD)
WE89: 128 colour pairs with Extra large colour differences (ECD),
Calculations I of XYZ, visual and delta_E* data for data sets KR=KITTELMANN_Relative
WE90: 128 colour pairs with Extra large colour differences (ECD),
Calculations II of XYZ, visual and delta_E* data for data sets KR=KITTELMANN_Relative
Colour difference formulae, colour pairs
with Visual threshold colour differences (V=Visual) (VCD)
WE91: 330 colour pairs with Visual threshold differences (VCD),
XYZ, visual and delta_E* data for data sets RI=RICHTER
WE92: 392 colour pairs with Visual threshold differences (VCD),
XYZ, visual and delta_E* data for data sets KI=KITTELMANN
WE93: 132 colour pairs with Visual threshold differences (VCD),
XYZ, visual and delta_E* data for data sets AV=AVRAMOPOULOS
Colour difference formulae, colour pairs with small colour differences (S=small) (SCD)
WE94: 418 colour pairs with small colour differences (SCD),
XYZ, visual and delta_E* data for data sets WI=WITT
WE95: 312 colour pairs with small colour differences (SCD),
XYZ, visual and delta_E* data for data sets RD=RIT_DUPONT
WE96: 307 colour pairs with small colour differences (SCD),
XYZ, visual and delta_E* data for data sets LE=LEEDS
WE97: 2776 colour pairs with small colour differences (SCD),
XYZ, visual and delta_E* data for data sets BF=BFD_ALL
WE98: 446 colour pairs with small colour differences (SCD),
XYZ, visual and delta_E* data for data sets SS=BIGC_S_SG
Colour difference experiments
WE99: Examples of data sets WI_0418 and VR_0128,
Relative and scaled visual difference.
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Examples of test charts and/or colorimetric experiments and calculations
Examples of affine colorimetry; elementary hues
WE00: rgb* input data and LCh* output data
sRGB- and offset colours; 9 step colour series in CIELAB hue triangles.
example file (1 page, 100 KB)
WE00/WE00L0NP.PDF
Examples of affine colorimetry; colorimetric shifts in hue triangles
WE04: colorimetric filter transfer rgb* -> rgb*n (n=1 to 8)BR>
in six hue planes (1, 0, 0), (1,1,0), ... (1, 0, 1).
example file (6 pages, 200 KB)
WE04/WE04L0NP.PDF
Test of colour differences for complementary colour pairs
WE05: 9 step hue circle; grey surround.
example file (460 pages, 18 MB)
WE05/WE05L0NP.PDF
Colour difference formulae CIELAB, CIEDE2000, CIEDE2000_PF, CIEDE2000_CUI, LABJND
CIE contrast and sensitivity
WE09: results with CIELAB, CIEDE2000, LABJND,
experiment RI in WN-direction.
example file (5 pages, 200KB)
WE09/WE09L0NP.PDF
CIELAB and LABJND colour difference formulae
Formulae for dY, CIE contrast dY/Y, and CIE sensitivity Y/dY
WE16: CIELAB and LABJND lightness L*
and derivation dL*/dY
example file (1 page1, 200 KB)
WE16/WE16L0NP.PDF
Colour difference formulae, Test of implementation of CIEDE2000 formula,
without Power Function correction
WE17: 10 example pairs with intermediate data calculated
by Excel
and with intermediate data calculated with the Postscript programming language
example file (6 pages, 200 KB)
WE17/WE17L0NP.PDF
Colour difference formulae, tables with delta_E* distribution and STRESS
for data sets VCD, TCD, SCD und LCD
without Power Function correction with CMC formula according to CIE 15
WE22: 418 + 312 + 307 + 2776 + 446 colour pairs
with small colour differences (SCD)
for data sets WI, RD, LE, BF und SS
example file (3 pages, 200 KB)
WE22/WE22L0NP.PDF
Colour difference formulae, tables with delta_E* distribution and STRESS
for data sets VCD, TCD, SCD und LCD
with Power Function correction with CMC formula according to CIE 15
WE26: 418 + 312 + 307 + 2776 + 446 colour pairs
with small colour differences (SCD)
for data sets WI, RD, LE, BF und SS
example file (3 pages, 200 KB)
WE26/WE26L0NP.PDF
Original colour difference data, CIELAB data set with delta_E*=1
315 regular sample pairs of Kittelmann
WE28: CIELAB data set, delta_E*CIELAB=1
example file (8 pages, 200 KB)
WE28/WE28L0NP.PDF
Original colour difference data, CIELAB data set with delta_E*PF=1
with Power function correction (PF)
315 regular sample pairs of Kittelmann
WE32: CIELAB data set, delta_E*CIELAB,PF=1
example file (8 pages, 200 KB)
WE32/WE32L0NP.PDF
Colour difference formulae CIELAB, CIEDE2000, CIEDE2000_PF, CIEDE2000_CUI, LABJND
CIE contrast and sensitivity
WE36: results with CIELAB, CIEDE2000, LABJND,
experiment KI in WN-direction.
example file (5 pages, 200KB)
WE36/WE36L0NP.PDF
Colour threshold experiments of achromatic colours of Kittelmann
17 sample pairs for D65, least square fit of visual threshold data with 4 constants,
delta_T*=1 for achromatic colours
WE42: Achromatic colours in WN-direction
as function of tristimulus value Y; 4 constants Ai
example file (1 page, 200 KB)
WE42/WE42L0NP.PDF
Colour threshold experiments of achromatic colours of Richter
15 sample pairs for P4000,
least square fit of visual threshold data with 2 to 4 constants,
delta_T*=1 for achromatic colours
WE45: Achromatic colours in WN-direction
as function of tristimulus value Y; 2 constants Ai
example file (3 pages, 200 KB)
WE45/WE45L0NP.PDF
Colour difference experiments
WE51: Names, colorimetric properties and download of
colour difference data sets SCD, TCD, and VCD
example file (1 page1, 100 KB)
WE51/WE51L0NP.PDF
CIELAB and LABJND colour difference formulae
Formulae for dY, CIE contrast dY/Y, and CIE sensitivity Y/dY
WE53: CIELAB and LABJND threshold lightness L*
and derivation dL*/dY
example file (1 page1, 200 KB)
WE53/WE53L0NP.PDF
Colour difference experiments
WE56: Example of SCD data set: WI_0418; LABJND formulae
example file (1 page1, 200 KB)
WE56/WE56L0NP.PDF
Colour difference formulae, tables with delta_E* distribution and STRESS
for data sets VCD, TCD, SCD und LCD
without Power Function correction with modified CMC formula
WE62: 418 + 312 + 307 + 2776 + 446 colour pairs
with small colour differences (SCD)
for data sets WI, RD, LE, BF und SS
example file (3 pages, 200 KB)
WE62/WE62L0NP.PDF
Colour difference formulae, tables with delta_E* distribution and STRESS
for data sets VCD, TCD, SCD und LCD
with Power Function correction with modified CMC formula
WE66: 418 + 312 + 307 + 2776 + 446 colour pairs
with small colour differences (SCD)
for data sets WI, RD, LE, BF und SS
example file (3 pages, 200 KB)
WE66/WE66L0NP.PDF
Colour difference formulae, colour pairs with threshold (T) colour differences (TCD)
WE71: 100 colour pairs with threshold (T) colour differences (TCD),
XYZ, visual and delta_E* data for data sets WA=WANG
example file (3 pages, 100 KB)
WE71/WE71L0NP.PDF
Tables of colour threshold data in CIE spaces Yxy, CIELAB and others
WE78: RI-experiments: series WPN, GDR, BDY in directions
WN, GR, BY; CIE-Yxy- and CIE-Yxy difference data; LABJND with constants for A and D65
example file (1 pages, 100 KB)
WE78/WE78L0NP.PDF
WE79: RI-experiments: series WPN, GDR, BDY in directions
WN, GR, BY; CIE-Yxy- and CIE-Yxy difference data; LABJND with constants for D65
example file (1 pages, 100 KB)
WE79/WE79L0NP.PDF
WE80: RI-experiments: series WPN, WDN, GDR, BDY in directions
WN, GR, BY; CIE-Yxy- and CIE-Yxy difference data; LABJND with special constants 0,8 1,4 1,1
example file (1 pages, 100 KB)
WE80/WE80L0NP.PDF
Colour difference formulae, colour pairs
with large colour differences (L=large) (LCD)
WE81: 128 colour pairs with large colour differences (LCD),
XYZ, visual and delta_E* data for data sets OS=OSA
example file (4 pages, 100 KB)
WE81/WE81L0NP.PDF
Colour difference formulae, colour pairs
with visual (V) threshold colour differences (VCD)
WE91: 330 colour pairs
with visual threshold colour differences (VCD),
XYZ, visual and delta_E* data for data sets RI=RICHTER
example file (8 pages, 200 KB)
WE91/WE91L0NP.PDF
Colour difference experiments
WE99: Examples of data sets WI_0418 and VR_0128,
Relative and scaled visual difference.
Example file (1 pag, 100 KB)
WE99/WE99L0NP.PDF
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