SciVisFall2007/Assignment 3 - Revision history

Eranders: /* Problem 1: Basic iso-surfacing techniques */

2007-11-19T02:50:20Z

Problem 1: Basic iso-surfacing techniques

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	=== Grads only ===		=== Grads only ===

	c. This dataset has vectors as well as scalars at each data point. Find a pair of visualizations (one visualization for each of the two time-steps) that illustrates how this vector field changes from the initial conditions. How can these two data best be coupled into a single visualization? What techniques allow most of the data to be immediately apparent and understood by the scientist? Note: VTK is capable of automatically selecting vectors vs. scalars when drawing streamlines in multi-modal datasets.		c. This dataset has vectors as well as scalars at each data point. Find a pair of visualizations (one visualization for each of the two time-steps) that illustrates how this vector field changes from the initial conditions (from time-step 0, to time-step 2). How can these two data (vector + scalar data) best be coupled into a single visualization? What techniques allow most of the data to be immediately apparent and understood by the scientist? Note: VTK is capable of automatically selecting vectors vs. scalars when drawing streamlines in multi-modal datasets.

	== Problem 2: Visualization of Magnetic Resonance Volumes ==		== Problem 2: Visualization of Magnetic Resonance Volumes ==

Eranders at 18:32, 16 November 2007

2007-11-16T18:32:40Z

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	== Problem 1: Basic iso-surfacing techniques ==		== Problem 1: Basic iso-surfacing techniques ==
	In this problem, you will explore data using iso-surfaces. ~~This [http://en.wikipedia.org/wiki/Tokamak Wikipedia article] discusses some~~ of the ~~fundamental properties~~ of the ~~data you will be visualizing~~. The data are represented as a vertex-centered unstructured hexahedral mesh with each point containing a single scalar and a single vector and are based on the datasets [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0000_bin~~.vtk ~~fusion_0000_bin~~.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0110_bin~~.vtk ~~fusion_0110_bin~~.vtk].		In this problem, you will explore data using iso-surfaces. The data contained in these 2 files represents 2 separate timesteps during acquisition of salinity data as the tide moves in and out of the Columbia River Inlet Estuary in Oregon. The data are represented as a vertex-centered unstructured hexahedral mesh with each point containing a single scalar and a single vector and are based on the datasets [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/columbia_river_001.vtk columbia_river_001.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/columbia_river_002.vtk columbia_river_002.vtk]

	a. For each of the two time-steps (t = 0 and t = ~~110~~) generate an iso-surface visualization using 3 iso-values. Be sure to use an appropriate coloring scheme to highlight all iso-surfaces involved. Describe how modifying the iso-values being represented influences your understanding of the data. Comment on the problems intrinsic to the display of multiple iso-surfaces in the same rendering and potential methods for solving them.		a. For each of the two time-steps (t = 1 and t = 2) generate an iso-surface visualization using 3 iso-values. Be sure to use an appropriate coloring scheme to highlight all iso-surfaces involved. Describe how modifying the iso-values being represented influences your understanding of the data. Comment on the problems intrinsic to the display of multiple iso-surfaces in the same rendering and potential methods for solving them.

	b. For each time-step, generate an animation by varying the iso-value being rendered. Make sure to explore the full range of the scalar data here. Does this method of visualization enhance or detract from the investigation of the data? Why or why not? Since parameter explorations are not stored in the version tree in a way we can easily see, please describe the parameterization(s) for any relevant modules you used to generate them in the Notes section of the version.		b. For each time-step, generate an animation by varying the iso-value being rendered. Make sure to explore the full range of the scalar data here. Does this method of visualization enhance or detract from the investigation of the data? Why or why not? Since parameter explorations are not stored in the version tree in a way we can easily see, please describe the parameterization(s) for any relevant modules you used to generate them in the Notes section of the version.
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	== Problem 3: Iso-surface Analysis ==		== Problem 3: Iso-surface Analysis ==
	In this problem, the space of iso-values will be explored BEFORE any iso-surfaces are extracted. Analysis will be performed in order to accurately predict which iso-values contain the most meaningful information. The data for this problem is at [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0000_bin~~.vtk ~~fusion_0000_bin~~.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0110_bin~~.vtk ~~fusion_0110_bin~~.vtk]. As above, these data are unstructured hexahedral meshes. An excellent [http://www.pascucci.org/pdf-papers/spectrum.pdf paper] and [http://www.pascucci.org/pdf-presentations/contour-spectrum-slides97.pdf presentation] of The Contour Spectrum has been created by the [http://www.pascucci.org author]. Remember that there are several properties of the data interesting to scientists in this field: curvature, volume, surface area, and shape.		In this problem, the space of iso-values will be explored BEFORE any iso-surfaces are extracted. Analysis will be performed in order to accurately predict which iso-values contain the most meaningful information. The data for this problem is at [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/columbia_river_001.vtk columbia_river_001.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/columbia_river_002.vtk columbia_river_002.vtk]. As above, these data are unstructured hexahedral meshes. An excellent [http://www.pascucci.org/pdf-papers/spectrum.pdf paper] and [http://www.pascucci.org/pdf-presentations/contour-spectrum-slides97.pdf presentation] of The Contour Spectrum has been created by the [http://www.pascucci.org author]. Remember that there are several properties of the data interesting to scientists in this field: curvature, volume, surface area, and shape.

	Hints: VTK provides modules to extract properties of their data. Of particular interest are vtkCurvatures and vtkMassProperties. Also, remember that a single version can render to two spreadsheet cells given additional sub-pipelines consisting of Renderers and Cells. Locations for these can be specified using the CellLocation module.		Hints: VTK provides modules to extract properties of their data. Of particular interest are vtkCurvatures and vtkMassProperties. Also, remember that a single version can render to two spreadsheet cells given additional sub-pipelines consisting of Renderers and Cells. Locations for these can be specified using the CellLocation module.

Eranders: /* Data */

2007-11-16T18:28:55Z

Data

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	These are:		These are:
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/assignment3.vt assignment3.vt] A VisTrail to start you out (useful for problem 3).		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/assignment3.vt assignment3.vt] A VisTrail to start you out (useful for problem 3).
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0000_bin~~.vtk ~~fusion_0000_bin~~.vtk] ~~Tokamak fusion simulation~~, time-step 0.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/columbia_river_001.vtk columbia_river_001.vtk] Columbia River Inlet Data, time-step 1.
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0110_bin~~.vtk ~~fusion_0110_bin~~.vtk] ~~Tokamak fusion simulation~~, time-step ~~110~~.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/columbia_river_002.vtk columbia_river_002.vtk] Columbia River Inlet Data, time-step 2.
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/chest.vtk chest.vtk] CT scan of the chest.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/chest.vtk chest.vtk] CT scan of the chest.
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/tooth.vtk tooth.vtk] CT scan of a human tooth.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/tooth.vtk tooth.vtk] CT scan of a human tooth.

Eranders: /* Problem 3: Iso-surface Analysis */

2007-11-13T19:10:57Z

Problem 3: Iso-surface Analysis

← Older revision		Revision as of 19:10, 13 November 2007
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	== Problem 3: Iso-surface Analysis ==		== Problem 3: Iso-surface Analysis ==
	In this problem, the space of iso-values will be explored BEFORE any iso-surfaces are extracted. Analysis will be performed in order to accurately predict which iso-values contain the most meaningful information. The data for this problem is at [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0000_bin~~.vtk fusion_0110_bin.vtk]. As above, these data are unstructured hexahedral meshes. An excellent [http://www.pascucci.org/pdf-papers/spectrum.pdf paper] and [http://www.pascucci.org/pdf-presentations/contour-spectrum-slides97.pdf presentation] of The Contour Spectrum has been created by the [http://www.pascucci.org author]. Remember that there are several properties of the data interesting to scientists in this field: curvature, volume, surface area, and shape.		In this problem, the space of iso-values will be explored BEFORE any iso-surfaces are extracted. Analysis will be performed in order to accurately predict which iso-values contain the most meaningful information. The data for this problem is at [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0110_bin.vtk fusion_0110_bin.vtk]. As above, these data are unstructured hexahedral meshes. An excellent [http://www.pascucci.org/pdf-papers/spectrum.pdf paper] and [http://www.pascucci.org/pdf-presentations/contour-spectrum-slides97.pdf presentation] of The Contour Spectrum has been created by the [http://www.pascucci.org author]. Remember that there are several properties of the data interesting to scientists in this field: curvature, volume, surface area, and shape.

	Hints: VTK provides modules to extract properties of their data. Of particular interest are vtkCurvatures and vtkMassProperties. Also, remember that a single version can render to two spreadsheet cells given additional sub-pipelines consisting of Renderers and Cells. Locations for these can be specified using the CellLocation module.		Hints: VTK provides modules to extract properties of their data. Of particular interest are vtkCurvatures and vtkMassProperties. Also, remember that a single version can render to two spreadsheet cells given additional sub-pipelines consisting of Renderers and Cells. Locations for these can be specified using the CellLocation module.

Eranders: /* Problem 1: Basic iso-surfacing techniques */

2007-11-13T19:10:41Z

Problem 1: Basic iso-surfacing techniques

← Older revision		Revision as of 19:10, 13 November 2007
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	== Problem 1: Basic iso-surfacing techniques ==		== Problem 1: Basic iso-surfacing techniques ==
	In this problem, you will explore data using iso-surfaces. This [http://en.wikipedia.org/wiki/Tokamak Wikipedia article] discusses some of the fundamental properties of the data you will be visualizing. The data are represented as a vertex-centered unstructured hexahedral mesh with each point containing a single scalar and a single vector and are based on the datasets [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0000_bin~~.vtk fusion_0110_bin.vtk].		In this problem, you will explore data using iso-surfaces. This [http://en.wikipedia.org/wiki/Tokamak Wikipedia article] discusses some of the fundamental properties of the data you will be visualizing. The data are represented as a vertex-centered unstructured hexahedral mesh with each point containing a single scalar and a single vector and are based on the datasets [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0110_bin.vtk fusion_0110_bin.vtk].

	a. For each of the two time-steps (t = 0 and t = 110) generate an iso-surface visualization using 3 iso-values. Be sure to use an appropriate coloring scheme to highlight all iso-surfaces involved. Describe how modifying the iso-values being represented influences your understanding of the data. Comment on the problems intrinsic to the display of multiple iso-surfaces in the same rendering and potential methods for solving them.		a. For each of the two time-steps (t = 0 and t = 110) generate an iso-surface visualization using 3 iso-values. Be sure to use an appropriate coloring scheme to highlight all iso-surfaces involved. Describe how modifying the iso-values being represented influences your understanding of the data. Comment on the problems intrinsic to the display of multiple iso-surfaces in the same rendering and potential methods for solving them.

Eranders: /* Data */

2007-11-13T19:09:16Z

Data

← Older revision		Revision as of 19:09, 13 November 2007
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	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/assignment3.vt assignment3.vt] A VisTrail to start you out (useful for problem 3).		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/assignment3.vt assignment3.vt] A VisTrail to start you out (useful for problem 3).
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] Tokamak fusion simulation, time-step 0.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] Tokamak fusion simulation, time-step 0.
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/~~fusion_0000_bin~~.vtk fusion_0110_bin.vtk] Tokamak fusion simulation, time-step 110.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0110_bin.vtk fusion_0110_bin.vtk] Tokamak fusion simulation, time-step 110.
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/chest.vtk chest.vtk] CT scan of the chest.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/chest.vtk chest.vtk] CT scan of the chest.
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/tooth.vtk tooth.vtk] CT scan of a human tooth.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/tooth.vtk tooth.vtk] CT scan of a human tooth.

Csilva at 01:58, 13 November 2007

2007-11-13T01:58:05Z

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	The assignment is due at midnight on November ~~??th~~. You will need to		The assignment is due at midnight on November 27th. You will need to
	use the CADE handin functionality to turn in your assignment. The		use the CADE handin functionality to turn in your assignment. The
	class account is "cs5630".		class account is "cs5630".

Csilva: /* FAQ */

2007-11-13T00:13:37Z

FAQ

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	== FAQ ==		== FAQ ==

	See FAQ [[SciVisFall2007/Assignment_3/FAQ \| here]].		See FAQ [[SciVisFall2007/Assignment_3/FAQ \| here]]. (To be completed based on students' questions.)

	== Data ==		== Data ==

Csilva at 00:03, 13 November 2007

2007-11-13T00:03:19Z

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	c. Contour spectra can have an arbitrary number of components. For these two data, discuss the components you think are most important to highlighting interesting areas of the data. Present at least two visualizations of a single contour spectra comprised of these components. A minimum of 3 spectral elements should be used to generate the contour spectrum for each dataset.		c. Contour spectra can have an arbitrary number of components. For these two data, discuss the components you think are most important to highlighting interesting areas of the data. Present at least two visualizations of a single contour spectra comprised of these components. A minimum of 3 spectral elements should be used to generate the contour spectrum for each dataset.

	== Problem 4: Visualization of Medical Volumes Optional for Extra Credit ==		== Problem 4: Visualization of Medical Volumes (Optional for Extra Credit) ==
	In this problem, we will investigate different volume rendering techniques for structured grids. All of the datasets for this part are structured grids generated from CT scans. The data for this problem is at [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/chest.vtk chest.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/tooth.vtk tooth.vtk]. This is a difficult problem and it is important to realize that computing histograms in a PythonSource module is certainly possible, but using an additional utility (e.g. [http://teem.sourceforge.net Teem]) is much easier.		In this problem, we will investigate different volume rendering techniques for structured grids. All of the datasets for this part are structured grids generated from CT scans. The data for this problem is at [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/chest.vtk chest.vtk] and [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/tooth.vtk tooth.vtk]. This is a difficult problem and it is important to realize that computing histograms in a PythonSource module is certainly possible, but using an additional utility (e.g. [http://teem.sourceforge.net Teem]) is much easier.

Csilva: /* Data */

2007-11-13T00:02:41Z

Data

← Older revision		Revision as of 00:02, 13 November 2007
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	== Data ==		== Data ==
	All the data you need is available at http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/. These are:
			The data is available on /home/cs5630/data/assignment3 in the CADE lab.

			All the data you need is also available at http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/.

			These are:
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/assignment3.vt assignment3.vt] A VisTrail to start you out (useful for problem 3).		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/assignment3.vt assignment3.vt] A VisTrail to start you out (useful for problem 3).
	* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] Tokamak fusion simulation, time-step 0.		* [http://www.sci.utah.edu/~eranders/scivis_fall07/assignment3/fusion_0000_bin.vtk fusion_0000_bin.vtk] Tokamak fusion simulation, time-step 0.