--------
Data Set
--------

   http://graphics.stanford.edu/data/voldata/

-----------------------
Additional Related Work
-----------------------

- an interface for cutting and peeling volume data

   % See also chapter 7 of Shigeru Owada's PhD thesis,
   % which is in English.
   %
   % http://www-ui.is.s.u-tokyo.ac.jp/~o/
   %
   @inproceedings{owada2004cut,
     author = {Shigeru Owada and Ayumi Akaboya and Frank Nielsen
       and Fusako Kusunoki and Takeo Igarashi},
     title = {Kiru (``Cut'', in Japanese)},
     booktitle = {12th Workshop
           on Interactive Systems and Software (WISS 2004)},
     pages = {1--4},
     year = 2004
   }

- other related work

   Shoukat Islam and Swapnil Dipankar and Deborah Silver and Min Chen
   Spatial and Temporal Splitting of Scalar Fields in Volume Graphics
   Proceedings of IEEE/SIGGRAPH Symposium on Volume Visualization (VolVis) 2004
   pp. 87--94

- strategies for dealing with occlusion in 3D, using deformation or otherwise

   Anna Vilanova Bartrol\'{\i} and Rainer Wegenkittl
      and Andreas K\"{o}nig and Eduard Gr\"{o}ller
   Nonlinear Virtual Colon Unfolding
   Proceedings of IEEE Visualization (VIS) 2001

   Armin Kanitsar and Rainer Wegenkittl and Dominik Fleischmann
      and Meister Eduard Gr\"{o}ller
   Advanced Curved Planar Reformation: Flattening of Vascular Structures
   Proceedings of IEEE Visualization (VIS) 2003

   Maneesh Agrawala and Doantam Phan and Julie Heiser and John Haymaker
      and Jeff Klingner and Pat Hanrahan and Barbara Tversky
   Designing Effective Step-By-Step Assembly Instructions
   Proceedings of SIGGRAPH 2003

   Wilmot Li and Maneesh Agrawala and David Salesin
   Interactive Image-Based Exploded View Diagrams
   Proceedings of Graphics Interface (GI) 2004

   Henry Sonnet and Sheelagh Carpendale and Thomas Strothotte
   Integrating Expanding Annotations with a 3D Explosion Probe
   Proceedings of ACM Advanced Visual Interfaces (AVI) 2004

   Marcelo Cohen and Ken Brodlie
   Focus and Context for Volume Visualization
   Proceedings of the Theory and Practice of Computer Graphics 2004 (TPCG'04)
   pages 32--39
   http://ieeexplore.ieee.org/xpl/abs_free.jsp?arNumber=1314450
   http://csdl.computer.org/comp/proceedings/tpcg/2004/2137/00/21370032abs.htm

   Ivan Viola and Armin Kanitsar and Meister Eduard Gr\"{o}ller
   Importance-Driven Volume Rendering
   Proceedings of IEEE Visualization (VIS) 2004

   Edward W. Ishak and Steven K. Feiner
   Interacting with Hidden Content Using Content-Aware
      Free-Space Transparency
   ACM UIST 2004


- interaction techniques for controlling deformations:

   % the "Freddy" paper
   Geoffrey M. Draper and Parris K. Egbert
   A Gestural Interface to Free-Form Deformation
   Proceedings of Graphics Interface (GI) 2003

- ruffling / riffling through pages of a virtual book
  is comparable to flipping through layers.
  See Figure 3 in

    % http://doi.acm.org/10.1145/238386.238446
    @inproceedings{card1996,
      author = {Stuart K. Card and George G. Robertson and William York},
      title = {The {WebBook} and the {Web Forager}:
               An Information Workspace for the World-Wide Web},
      booktitle = {Proceedings of ACM CHI 1996
                  Conference on Human Factors in Computing Systems},
      year = 1996,
      pages = {111--117}
    }

  Also of interest in this context is work on RSVP
  (rapid serial visual presentation).

    @article{spence2002,
      author = {Robert Spence},
      title = {Rapid, Serial and Visual:
              a presentation technique with potential},
      journal = {Information Visualization},
      year = 2002,
      month = {March},
      volume = 1,
      number = 1,
      pages = {13--19},
      publisher = {Palgrave Macmillan Ltd}
    }

  More work on interacting with layers:

    Pierre Dragicevic
    Combining Crossing-Based and Paper-Based Interaction Paradigms
       for Dragging and Dropping Between Overlapping Windows
    ACM UIST 2004

    @inproceedings{agarawala2006,
      author = {Anand Agarawala and Ravin Balakrishnan},
      title = {Keepin' It Real:
         Pushing the Desktop Metaphor with Physics, Piles and the Pen},
      booktitle = conf_chi,
      year = 2006,
      pages = {1283--1292}
    }

---------
Omissions
---------

- In section 4, 8th paragraph, we say
     "Voxels near a surface of the data set have
     a normal computed from their neighbourhood"
  To be more precise, these normals are computed
  as the direction of the gradient of the data.

------
Errata
------

- section 4, 4th page, last paragraph of left column, 4th sentence:
  "(b) unselecting the outermost selected layer"
  should be "(b) unselecting the innermost selected layer"

- The reference to Callahan et al. [1988] has an incorrect paper title.
  The correct reference is

   @inproceedings{callahan1988,
      author = {Jack Callahan and Don Hopkins and Mark Weiser
                   and Ben Shneiderman},
      title = {An empirical comparison of pie vs. linear menus},
      booktitle = {Proceedings of ACM CHI Conference on
              Human Factors in Computing Systems},
      year = 1988,
      pages = {95--100}
   }

-----
Typos
-----

- section 4.4, 2nd paragraph: "Figures 8" should be "Figure 8"

- The reference to Kurtenbach and Buxton has a typo in the paper
  title, which should read "hierarchic", not "hierarchical".
  Also, the pages should be 482--487, not 35--42.