Feb 21 2003 Xiaoyan Song Color Calculator Xiaoyan

Feb. 21, 2003 Xiaoyan Song Color Calculator Xiaoyan Song xas 2911@cis. rit. edu Feb. 21, 2003

Outline Motivation w Project Overview w Background w Flowchart, GUI, Features w Feb. 21, 2003 Xiaoyan Song 2

Motivation Present a handy tool for color calculation w A tool for color science short-course education w Feb. 21, 2003 Xiaoyan Song 3

Project Overview w CIE Standard Demo • Illuminants A and D 65 • Observer (1931 and 1964) Color Matching Function w Color Spaces Transformation w Color Difference Calculation w Feb. 21, 2003 Xiaoyan Song 4

Background w CIE • Commission Internationale DE ’ECLARAGE • International Commission on Illumination CIE Standard (Illuminants, Observer) w Tristimulus Calculation w Color Space w Color Difference w Feb. 21, 2003 Xiaoyan Song 5

Standard Illuminant w Light defined by a relative spectral power distribution Feb. 21, 2003 Xiaoyan Song 6

Standard Observer Feb. 21, 2003 Xiaoyan Song 7

Calculating Tristimulus Feb. 21, 2003 Xiaoyan Song 8

Color Space w It is used for color specification XYZ Chromaticity 1976 L*a*b* Feb. 21, 2003 Xiaoyan Song 9

Color Difference Delta E*ab Delta E*94 Delta E*00 Feb. 21, 2003 Xiaoyan Song 10

Feb. 21, 2003 Xiaoyan Song 11

Flowchart Database User’s Input Data Color Calculator Graphic Output Calculation Result Feb. 21, 2003 Xiaoyan Song 12

GUI Feb. 21, 2003 Xiaoyan Song 13

Features I: w Flexible Options for CMF • • Illuminant A OR Illuminant D 65 2 Degree OR 10 Degree Observer Wavelength ranges and interval Calculation Methods • CIE traditional method • ASTM 308 • Luminance Unit Feb. 21, 2003 Xiaoyan Song 14

Feature II: w Introduce new improvements in Color Difference Calculation • CIELAB • CIE 94 • CIE 2000 (new) Feb. 21, 2003 Xiaoyan Song 15

Feature III: Visualization w Visualization • Standard Observer • Standard Illuminant • Reflectance w Flexible results output • Data. txt file • Various image file (jpg, bmp, png, gif, tiff, …) Feb. 21, 2003 Xiaoyan Song 16

Future Work w Computer platforms compatibility Feb. 21, 2003 Xiaoyan Song 17

Thanks ! Feb. 21, 2003 Xiaoyan Song 18