CSE 591: Visual AnalyticsLecture 3: ColorKlaus MuellerComputer Science DepartmentStony Brook UniversityWith some material from Robert Kosara, UNCC, and Daniel Keim, U KonstanzSpectrum of WavelengthsPerception Curveshuman color sensitivity curvescolor generation with primariesPerceptional Color SpacesNon-Perceptional Color Spaces RGB HSVcompare to: CIE LAB in 3DMore on ColorMore on Color More on ColorUse of Color Luminance ContrastLuminance Contrast Color Contrast and HarmonyChromatic Aberration Color Adds More Dimensionssource: Maureen StoneColor Adds Aestheticssource: Maureen StoneBut… Mapping to Color Can Cause Problemssource: Maureen StoneColor Mapssource: Rogowitz/TreinishColor Map: Segmentation Taskssource: Rogowitz/TreinishColor Map: Rainbowsource: Rogowitz/TreinishColor Map: Linear Huesource: Rogowitz/TreinishColor Maps: Spatial Frequency Issuessource: Rogowitz/TreinishColor Maps: Low vs. High Frequencyweather modellow frequencyradar scanhigh frequencysource: Rogowitz/TreinishColor Maps: Highlightingsource: Rogowitz/TreinishBrewer ScaleNominal scales•distinct hues, but similar emphasisSequential scales•vary in lightness and saturation• vary slightly in hueDiverging scale•complementary sequential scales• neutral at “zero”source: Maureen StoneBrewer Scalessource: Maureen StoneExample for Proper Use of
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