Please answer the following two questions that pertain to Lecture 22.

  1. Similar to showing a histogram of the scalar values in a transfer function editor, the contour spectrum allows the user to explore the space of possible isosurface using a widget that encodes a variety of characteristic metrics. Describe two possible metrics that could be used and what types of isosurfaces (or isosurface features) they might help identify.

  2. Each node in a contour tree may be either a leaf (having valence one) or a branch point (having valence greater than one). Nodes are associated with different types of critical points in the scalar field (maximum, minima, or saddles). State which type of node corresponds to which type of critical point. Describe the correspondence between nodes and how the components of the isosurface change when sweeping through the space of function values.

Grading

Submit your quiz in a folder called quizzes in your git repo. Within this folder create a file Q08.txt that has your answers.

For each question, I’m expecting an answer of 150 words or less. Aim to answer each question in a single paragraph.

I plan to grade your answer on a scale of 0-5, where 5 indicates that you completely answered all portions of the question. Thus, you will receive a score of 0-10 for this quiz. This score will be scaled to the total value of this quiz for your final grade (1%).