Digital image processing (2nd ed.)
Digital image processing (2nd ed.)
Envisioning information
Computer graphics: principles and practice (2nd ed.)
Computer graphics: principles and practice (2nd ed.)
Guest Editors' Introduction: Using Color in Gomputer Graphics
IEEE Computer Graphics and Applications
Color Sequences for Univariate Maps: Theory, Experiments and Principles
IEEE Computer Graphics and Applications
Procedural annotation of uncertain information
Proceedings of the conference on Visualization '00
Visualizing Data with Bounded Uncertainty
INFOVIS '02 Proceedings of the IEEE Symposium on Information Visualization (InfoVis'02)
The Challenge of Missing and Uncertain Data
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Revealing uncertainty for information visualization
Information Visualization
Visualizing missing data: graph interpretation user study
INTERACT'05 Proceedings of the 2005 IFIP TC13 international conference on Human-Computer Interaction
Information Visualization - Special issue on State of the Field and New Research Directions
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Pseudocoloring is a frequently used technique in scientific visualization for mapping a color to a data value. When using pseudocolor and animation to visualize data that contain missing regions displayed as black or transparent, the missing regions popping in and out can distract the viewer from the more relevant information. Filling these gaps with interpolated data could lead to a misinterpretation of the data. This paper presents a method for combining pseudocoloring and grayscale in the same colormap. Valid data are mapped to colors in the colormap. The luminance values of the colors bounding areas of missing data are used in interpolating over these regions. The missing data are mapped to the grayscale portion of the colormap. This approach has the advantages of eliminating distracting gaps caused by missing data and distinguishing between those areas that represent valid data and those areas that do not. This approach was inspired by a technique used in the restoration of paintings.