BIB-VERSION:: CS-TR-v2.0
          ID:: STAN//CSL-TR-94-607
       ENTRY:: November 28, 1994
ORGANIZATION:: Stanford University, Computer Systems Laboratory
       TITLE:: Spreadsheets for Images
        TYPE:: Technical Report
      AUTHOR:: Levoy, Marc
        DATE:: February 1994
       PAGES:: 12
    ABSTRACT:: We describe a data visualization system based on
               spreadsheets. Cells in our spreadsheet contain graphical
               objects such as images, volumes, or movies. Cells may also
               contain graphical widgets such as buttons, sliders, or movie
               viewers. Objects are displayed in miniature inside each cell.
               Formulas for cells are written in a programming language that
               includes operators for array manipulation, image processing,
               and rendering. Formulas may also contain control structures,
               procedure calls, and assignment operators with side effects.

               Compared to flow chart visualization systems, spreadsheets
               are more expressive, more scalable, and easier to program.
               Compared to numerical spreadsheets, spreadsheets for images
               pose several unique design problems: larger formulas, longer
               computation times, and more complicated intercell
               dependencies. We describe an implementation based on the Tcl
               programming language and the Tk widget set, and we discuss
               our solutions to these design problems. We also point out
               some unexpected uses for our spreadsheets: as a visual
               database browser, as a graphical user interface builder, as a
               smart clipboard for the desktop, and as a presentation tool.
       NOTES:: [Adminitrivia V1/Prg/19941128]
         END:: STAN//CSL-TR-94-607