Surface-based operations on volume

I have read several documents about semantic strative visualization paper that I didn't understand in the past two days,
The first is Discontinuous Displacement Mapping for Volume Graphics.
Vertex is used for location ing, but the normal is calculated at this time, and the vertex needs to be re-computed when the texture is obtained. In graphics
Displacement mapping is discarded Based on the constraints of normal direction ing. I started to think that this idea is very good. It is quite easy to think about it.
However, the normal needs to be re-computed, bringing a bunch of formulas to his article. It is estimated that his article is very strong.

The second is the author's article Feature-aligned Volume Manipulation. This article is actually the same as the basic method, it is necessary to identify a 3d texture in which vertex is moved, the operations are different when you map it to the volume vertex. The former is just a simple vertex shift. The latter samples medical equipment features such as peeler retractors and plier dilator and defines some different conversion methods. Therefore, the alignment must be taken into account when one part changes and the other part remains unchanged. How can we define this alignment? The author came up with the surface alignment. In fact, the distance filed is used, and the segment alignment doesn't feel much different.
Of course, this article is strong in that its operation is defined based on these surgical devices, making people feel really novel. But think about it, I suspect that these are the excuses he came up with after finishing his subsequent work.

Then Peter Rautek's Carcaturistic Visualization. At first glance, I think this article is very novel, and it is difficult to understand the previous estimation.
Today, I read it carefully and found that he just used the model to perform geometric transformation on the object B, that is, to modify the vertex coordinates of A 3d object. Of course, from the cartoon perspective, it is estimated that this is the case.

For Stefan Bruckner's exploded views for volume data, the segment using Newton mechanics is indeed very novel. Some mechanical formulas of graphics are defined and then implemented using a rigid physical engine. This idea is really awesome !! I have always admired bruckner!

Stefan Bruckner 07EG's Sytle Tranfer Function began to be confused by its definition of sphere shading for a while, and later found that his article is actually very simple, that is, using the x direction, the normal line in the y direction is used as the alpha Tranfer function of 2D. Of course, he felt that this article was not easy to write, so he defined an Au, Ad, a direction-related, and an irrelevant. Then, the calculation process of curvature is directly replaced by normal changes.

Next, ClearView: An Interactive Context Preserving Hotspot Visualization Technique. It seems nothing special. It combines surface rendering and volume rendering with xiaoru yuan04 Eurovis's article, it is actually a framework. Only the former integrates the existing transfer function and improves the composite mode. The latter only uses line to highlight the surface. Of course, in, there seems to be some people in Germany doing this.

Wei Chen's Shape-aware Volume authentication was carefully read again, and he found that this article was the first (as far as I know) to perform mesh deformation on the surface in visualization. In fact, I also thought about this idea when preparing PG in April this year. At that time, it was too troublesome to consider programming and later I gave up.

FinallySaliency-GuidedEnhancement for Volume Visualization. In this article, the user first specifies a saliencey field, and then the author uses some algorithms to propose an emphasis field from saliency field. I feel that this article is really meaningless. First, why is it so troublesome to get out of emphasis field. Why not let the user get the emphaiss field? Second, its algorithm is almost the same as the mesh saliency of their group for the year 05, but instead of the curvature. Think about how powerful the ox group is! It is estimated that I will not be able to write this article.

In fact, in all three aspects of work, one is to do some work on the volume Surface, such as deformation, line, stipple, and lighting. Second, it is quite difficult to modify the tranfer function of volume .. Third, add another field to volume, such as importance field and displacement texture.

After reading so many articles, I began to be intimidated by the idea source at the beginning of my article. The final methods in many articles are very simple, so I sometimes doubt whether these authors have added so many seemingly unrelated prefixes to make the articles easy. In other words, they may have a wealth of knowledge in other aspects. They can be connected with each other and find a good saying than their own work.