Techniques for precision-based visual analysis of projected data

The analysis of high-dimensional data is an important, yet inherently difficult problem. Projection techniques such as PCA, MDS, and SOM can be used to map high-dimensional data to 2D display space. However, projections typically incur a loss in information. Often uncertainty exists regarding the precision of the projection as compared with its original data characteristics. While the output quality of these projection techniques can be discussed in terms of algorithmic assessment, visualization is often helpful for better understanding the results. We address the visual assessment of projection precision by an approach integrating an appropriately designed projection precision measure directly into the projection visualization. To this end, a flexible projection precision measure is defined that allows the user to balance the degree of locality at which the measure is evaluated. Several visual mappings are designed for integrating the precision measure into the projection visualizati...

• Type: Conference
• Year: 2010
• Where: VDA
• Authors: Tobias Schreck, Tatiana von Landesberger, Sebastian Bremm
• Keywords: Projection Precision, Projection Precision Measure, Projection Techniques, VDA 2010, Visualization