Every effort has been made to present factual data. A reliable source that was there supplied me with this report. I arrived on the scene about two years later and shared an office with this individual. I was aware of his work with computer matching although my knowledge at the time was insufficient for any appreciation of the advanced state of his technology. Yes, the names were redacted to protect the GUILTY!
Anyone having actual industrial experience using CIEDE2000, please visit the message board and tell of your success or failures. Thank you.
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"Theoretical knowledge alone cannot make a successful colorist, but it certainly proves of great value in explaining the true causes of failure and in directing the conditions which lead to success"- by David Paterson, from The Science of Colour Mixing, 1900.
How true yet today, over 100 years later. We supply the theoretical knowledge and show you how it applies to your process. Color science classes, consulting, and application training custom designed to your special needs. Paint, plastics, textiles, & process printing. If you color it, we can help you get it right!
or Call (727) 391-8562 and ask for Ron.Click Here To Add This Site To Your Favorites!
Follow the external links below to find out more about color or browse this location using the menu to the right. As always we are not responsible for any content outside our own site.
These links will lead you to other links and other links...
CRAYOLA Color can be fun!
Color Science & Technology Color can be very technical.
Munsell Color Science Lab Color is sometimes for the educated.
Cornell U Color is psychophysical and very tricky.
The Paint Store Some practical application.
Below are some freebie programs (sometimes the best kind) for your enjoyment. Check back here regularly since plans are to have more free programs and utilities related to color and color control in the future.
If you are running late versions of Windows (98, ME, XP or Vista) the following programs might execute as stand alone programs without any necessary installation routines other than saving the executable (.exe) on your computer and then double clicking it or making yourself a shortcut if you wish. To find out if it will execute, click the link and then open the file. If it runs, then close it and reclick the link to choose save it on your computer for later use. You will probably get a virus warning, so if you don't want to execute the file, then download it and virus scan it to satisfy yourself it is safe. It will either run or tell you that a .dll file is missing. If you get the missing file message and still want the program then contact me. If there is enough interest I will make the installable downloads available.
Calculate DE -this calculates Delta E's using the latest methods, CIEDE2000, DIN99, CMC1, CMC2, and 1976CIE. Simply keyin the L*a*b* numbers.Color Matching Practice -this lets you practice matching random colors in RGB, CMY, LAB or LCh mode while your progress is plotted in Lab space. Try it. You'll have fun and quickly discover which is easiest for you! This program also displays 1976CIELAB D65/2Degree data based on the sRGB standard as well as CMC and CIEDE2000 color differences with related deltas. Playing around with this program will definitely sharpen your color eye as well as opening your eyes to some lesser known facts regarding RGB conversions and system precision. LAB numbers are converted to RGB and back and shown side by side. I have opinions but you can be the judge. Remember that in 10xRes mode the precision is 100 times more than my version of Photoshop 6.0! See Color Science for the Graphics Artist for more details of what can happen. Program plots the sRGB color solid along with all six of its orthographic projections in CIELAB space.
Sudoku Solver -nothing to do with color but is a program I wrote to help solve Sudoku Puzzles - the latest Japanese craze to catch America's attention. Run it in place or save it to your computer if you wish.
CryptoQuote Helper. -once again, nothing to do with color, just another fun program to aid solving King Features Syndicate Inc. Cryptoquote Puzzles published daily in many newspapers. It doesn't do any decoding (although I considered it), you must supply the brain power. It analyzes character frequencies and keeps track of your progress allowing you to focus on your task of figuring out the quotation. Takes out the drudgery yet leaves in the fun! Installable talking version.
The following program is a DOS/Windows executable (.exe) that can be downloaded or run in place as above. No other files or installation is needed. Be patient when running this program, it must make a jillion calculations to do the ellipse plotting and you might think it is frozen. Wait and it will do its thing.
Acceptability Ellipse Plots -this lets you plot your own CMC, DE2000, and DIN ellipses about the a*b* target you select with your own Commercial Factor.CMC Maximum Data -this is the raw data file described in presentation "DE2000 and CMC Differences Plotted". Click here to download to your computer. The file should be opened by your browser, Internet Explorer, Netscape, etc. Once the transfer is complete, use file save as option to put it where you want. It is a comma delimited text file that can be imported or opened by other programs for data manipulation. This file was opened with MS Excel to create the graph in the presentation.
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Comparison of Blues
Much has been written on this site regarding attempts to analyze the the ellipses and select samples for evaluation to verify the accuracy of CIEDE2000 in the strong blue region of color space. More definitive information is now available regarding the particular ellipse centered at a*=0, b*=-30, cf=0.5. If you are into instrumental color control or want to be, this is a must read.
The Shape of sRGB
Ever wondered about the true shape of color space? Excellent graphic representation of true three dimensional shape of sRGB color space. Way beyond the triangle often seen.
It's Easy to Fool the Eye.
Check out this illusion illustrating very well that seeing is not necessarily believing! It's amazing how quickly the eyes can get "tired" resulting in seeing something that's not really there!
More Fooling the Eye.
Humans prefer their color world ordered or at least appear that way. Good illustration of both the pitfalls and advantages of simultaneous contrast. Play around with drag and drop enabled color patches to see first hand what can be done with sorting and tapering.
CIELAB LCh Model.
10x10 unit Lightness/ Chroma maps made at 10 degree hue angle increments representing gamut of typical RGB monitor.
Soon to be updated - SAEJ1545 Recommended Practice for Automotive Color Control.
Dealing with standards and controls that are a little bit off.
Recent Developments - CIE releases DE2000. DIN99 Issued.
Slide presentation showing chromatic acceptability ellipses along with plots for CMC and 1976 CIELab. Excellent graphical comparison showing how these methods relate to each other in different regions of color space.
Curve Shifting - ABS vs PP.
Slide presentation detailing curve shifting ABS reference standards to synchronize with PP plaques.
Curve Shifting for Color Quality Control.
An in depth presentation detailing the need for curve shifting and how it can easily be achieved through direct reflectance manipulation, a technique requiring no pigmentation or colorant related information. A scaled down version was scheduled for the March ISCC conference in Philadelphia but health problems prevented that from happening.
Precise Instrumental Color Control.
Overview of instrumental color control from the birth of colorimetry to fine tuning the process through creating precision drift standards. This presentation contains narration files that work best on broadband connection.
Is there a problem?
CIE DE2000 exhibits some unusually shaped acceptability ellipses in strong blue region of color space. Resulting from averaging standard and batch Lab's for parametric calculation, ellipses are skewed towards increased chroma.
It looks like there is a problem!
Follow up to "Is there a problem?" showing the comparisons of the four blue test pairs proposed in that presentation.
Color Science for the Graphics Artist
Excellent detail of development of CIE color space and its use in graphics programs. Why 1976 CIELAB could be the best way to go.
DE2000 and CMC Differences Plotted
Detailed description and analysis of the DE2K equation and a graphical color space display showing magnitude of differences from CMC. Comparisons between the two systems are shown at ~26,000 points in color space. Complete raw data available on request.
Don't draw me no circles and triangles, just tell me what to add!
Did you ever wonder why some colors are much harder to match than others? This presentation shows a sure fire way of matching a color and outlines a method for learning how to color match. Graphical analysis of a color match is detailed and explained. Works well with Lab data input but can also be used on a purely visual basis.
Ever wondered about the true shape of color space? Excellent graphic representation of true three dimensional shape of sRGB color space. Way beyond the triangle often seen.
It's Easy to Fool the Eye.
Check out this illusion illustrating very well that seeing is not necessarily believing! It's amazing how quickly the eyes can get "tired" resulting in seeing something that's not really there!
More Fooling the Eye.
Humans prefer their color world ordered or at least appear that way. Good illustration of both the pitfalls and advantages of simultaneous contrast. Play around with drag and drop enabled color patches to see first hand what can be done with sorting and tapering.
CIELAB LCh Model.
10x10 unit Lightness/ Chroma maps made at 10 degree hue angle increments representing gamut of typical RGB monitor.
Soon to be updated - SAEJ1545 Recommended Practice for Automotive Color Control.
Dealing with standards and controls that are a little bit off.
Recent Developments - CIE releases DE2000. DIN99 Issued.
Slide presentation showing chromatic acceptability ellipses along with plots for CMC and 1976 CIELab. Excellent graphical comparison showing how these methods relate to each other in different regions of color space.
Curve Shifting - ABS vs PP.
Slide presentation detailing curve shifting ABS reference standards to synchronize with PP plaques.
Curve Shifting for Color Quality Control.
An in depth presentation detailing the need for curve shifting and how it can easily be achieved through direct reflectance manipulation, a technique requiring no pigmentation or colorant related information. A scaled down version was scheduled for the March ISCC conference in Philadelphia but health problems prevented that from happening.
Precise Instrumental Color Control.
Overview of instrumental color control from the birth of colorimetry to fine tuning the process through creating precision drift standards. This presentation contains narration files that work best on broadband connection.
Is there a problem?
CIE DE2000 exhibits some unusually shaped acceptability ellipses in strong blue region of color space. Resulting from averaging standard and batch Lab's for parametric calculation, ellipses are skewed towards increased chroma.
It looks like there is a problem!
Follow up to "Is there a problem?" showing the comparisons of the four blue test pairs proposed in that presentation.
Color Science for the Graphics Artist
Excellent detail of development of CIE color space and its use in graphics programs. Why 1976 CIELAB could be the best way to go.
DE2000 and CMC Differences Plotted
Detailed description and analysis of the DE2K equation and a graphical color space display showing magnitude of differences from CMC. Comparisons between the two systems are shown at ~26,000 points in color space. Complete raw data available on request.
Don't draw me no circles and triangles, just tell me what to add!
Did you ever wonder why some colors are much harder to match than others? This presentation shows a sure fire way of matching a color and outlines a method for learning how to color match. Graphical analysis of a color match is detailed and explained. Works well with Lab data input but can also be used on a purely visual basis.
Humans prefer their color world ordered or at least appear that way. Good illustration of both the pitfalls and advantages of simultaneous contrast. Play around with drag and drop enabled color patches to see first hand what can be done with sorting and tapering.
CIELAB LCh Model.
10x10 unit Lightness/ Chroma maps made at 10 degree hue angle increments representing gamut of typical RGB monitor.
Soon to be updated - SAEJ1545 Recommended Practice for Automotive Color Control.
Dealing with standards and controls that are a little bit off.
Recent Developments - CIE releases DE2000. DIN99 Issued.
Slide presentation showing chromatic acceptability ellipses along with plots for CMC and 1976 CIELab. Excellent graphical comparison showing how these methods relate to each other in different regions of color space.
Curve Shifting - ABS vs PP.
Slide presentation detailing curve shifting ABS reference standards to synchronize with PP plaques.
Curve Shifting for Color Quality Control.
An in depth presentation detailing the need for curve shifting and how it can easily be achieved through direct reflectance manipulation, a technique requiring no pigmentation or colorant related information. A scaled down version was scheduled for the March ISCC conference in Philadelphia but health problems prevented that from happening.
Precise Instrumental Color Control.
Overview of instrumental color control from the birth of colorimetry to fine tuning the process through creating precision drift standards. This presentation contains narration files that work best on broadband connection.
Is there a problem?
CIE DE2000 exhibits some unusually shaped acceptability ellipses in strong blue region of color space. Resulting from averaging standard and batch Lab's for parametric calculation, ellipses are skewed towards increased chroma.
It looks like there is a problem!
Follow up to "Is there a problem?" showing the comparisons of the four blue test pairs proposed in that presentation.
Color Science for the Graphics Artist
Excellent detail of development of CIE color space and its use in graphics programs. Why 1976 CIELAB could be the best way to go.
DE2000 and CMC Differences Plotted
Detailed description and analysis of the DE2K equation and a graphical color space display showing magnitude of differences from CMC. Comparisons between the two systems are shown at ~26,000 points in color space. Complete raw data available on request.
Don't draw me no circles and triangles, just tell me what to add!
Did you ever wonder why some colors are much harder to match than others? This presentation shows a sure fire way of matching a color and outlines a method for learning how to color match. Graphical analysis of a color match is detailed and explained. Works well with Lab data input but can also be used on a purely visual basis.
Dealing with standards and controls that are a little bit off.