1. LensBar – Visualization for Browsing and Filtering Large Lists of Data Toshiyuki Masui Proceedings. IEEE Symposium on Information Visualization, 1998 元智資工所 系統實驗室 楊錫謦 2000/10/20

2. Outline Introduction Strategies Detailed Description Examples Compared to Donald ’ s scrollbar

3. Introduction Various visualization and information retrieval techniques have been proposed. In some systems, visualization and filtering are integrated. Most existing systems suffer from: applicable only to special application domains Special interaction techniques are usually required.

4. Introduction(Cont.) They propose a interface tool called LensBar for filtering and visualizing large data lists. an extension to a conventional scroll window

5. Strategies Browsing the list using a precisely-controllable slider and scroll window. Controlling the amount of data to be displayed by keyword filtering and zooming. Visualizing the distribution of filtered data in the background of the slider.

6. Detailed Description Integrated browsing and querying a slider & an extra text input area Entries that match the specified pattern are displayed in the scroll window. Corresponding positions in the slider background are highlighted to show the locations. Slider knob moves only on the highlighted portion.

7. Detailed Description(Cont.) Dynamic approximate string matching Zooming interface A DOI value is dynamically assigned to each entry. Entries whose DOI value is bigger than the zooming level are selected for display. Precise control of the slider Clicking the mouse on the slider knob allows the user to move the knob directly to any place on the bar.

8. Example 1 - dictionary

9. Example 1(Cont.)

10. Example 2 – message browser

11. Example 3 – program browser

12. Example 4 – hierarchical menu

13. Compared to Donald ’ s scrollbar