@InProceedings{PintoFrei:2006:TwInTr,
author = "Pinto, Francisco de Moura and Freitas, Carla Maria Dal Sasso",
affiliation = "UFRGS and UFRGS",
title = "Two-Level Interaction Transfer Function Design Combining Boundary
Emphasis, Manual Specification and Evolutive Generation",
booktitle = "Proceedings...",
year = "2006",
editor = "Oliveira Neto, Manuel Menezes de and Carceroni, Rodrigo Lima",
organization = "Brazilian Symposium on Computer Graphics and Image Processing, 19.
(SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "Volume visualization, transfer functions, volume rendering.",
abstract = "Direct volume rendering plays an important role in the
investigation of volumetric data. In order to display these data,
their values must be associated to optical properties. This task
is accomplished by transfer functions (TFs), which assign
properties like color and opacity to voxel values in the volume.
TFs are very important to produce informative images that reveal
volume features, but their specification is a non-trivial and
unintuitive problem. Without any help in the TF design process,
the user goes through a frustrating and time-consuming
trial-and-error process. This work proposes a two-level
interactive framework combining a few useful semi-automatic design
techniques for one-dimensional opacity and color transfer
functions. We use the histogram approach proposed by Kindlmann and
Durkin, manual design aided by dual domain interaction (space
domain and TF domain), stochastic evolutive design and qualitative
analysis of multiple TF possibilities using a Design
Galleries-inspired method (thumbnails in the first level of
interaction and refinement of zoomed-in images in the second
level). The combination of these strategies offers precise control
over the transfer function specification, plus some interactive
guidance, as well as semi-automatic and evolutive search in the TF
space.",
conference-location = "Manaus, AM, Brazil",
conference-year = "8-11 Oct. 2006",
doi = "10.1109/SIBGRAPI.2006.45",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2006.45",
language = "en",
ibi = "6qtX3pFwXQZG2LgkFdY/MepM4",
url = "http://urlib.net/ibi/6qtX3pFwXQZG2LgkFdY/MepM4",
targetfile = "pinto_transfer_functions.pdf",
urlaccessdate = "2025, Feb. 12"
}