The frequently used model in computer graphics

Today, I searched the web for a more commonly used model in the form of learning. Think it's interesting, gather them up and summarize them.

1, Lena/lenna

This model is a beauty, named Lena, is a November 1972 "Playboy" (Domestic translation: Playboy) magazine an illustration.

I do not know why the Playboy magazine please go to Baidu.

Lena is a Swedish man. According to English standard pronunciation, translates as Lenna.

To come down Zhang:

The original of the Playboy: Http://www.ee.cityu.edu.hk/~lmpo/lenna/len_full.jpg

June 1973. An assistant professor and one of his graduate students at the University of Southern California's Signal Imaging Institute intends to find a digital photograph for an academic meeting. And they are bored with the piles of "boring" photos on hand. What they need is a photo of a human face. At the same time can make a person's eyes bright. Just then someone came into the lab with a Playboy magazine at the time. The results of the story happened ... It was confined to the laboratory equipment and the need to test the film. The picture of Lenna only the shoulder part of the original.

Lena Image compression algorithm is the most widely used standard test--her face and bare shoulders have become the industry standard. The graphs are moderately blended with details, smooth areas, shadows, and textures to test various image processing algorithms very well. At the same time, Lena is still a beautiful woman. The pictures were very appealing.

Test Site: http://blog.sina.com.cn/s/blog_53ebc106010007m2.html

2, Stanford Bunny

Stanford Bunny. This is supposed to be a famous one.

Anyone who does graphics should not know it.

the model was first used by Stanford University and is therefore called the Stanford Bunny. This rabbit is often used in graphic science, which consists of 69,451 triangles. It's 7.5 feet high. It can be used to test a variety of graphics algorithms, including polygon simplification, compression and smooth surface.

With the improvement of hardware level. The rabbit is already a simple model, but it is still best to hinder it from becoming one of the most classic graphical models. The rabbit has been around for nearly 20 years since 1993, when it was proposed.

Test Site: http://www.cc.gatech.edu/~turk/bunny/bunny.html

3, Utah teapot

Utah teapot. Or Neuville teapot, is widely used in the computer graphics academic reference objects. The styling comes from a simple teapot that is common in life. It is made into a mathematical model with solid, cylindrical and partial surfaces.

The teapot model was produced in 1975 by Martin Newville, an early computer graphics researcher who was a member of the University of Utah's pioneer graphic project team.

This teapot styling includes a number of important features that make it the ideal choice for computer graphics players at the time – sleek, with more saddle points, and a hole in the handle to make the surface more than 0, to form a projection on its own, and not to look distorted when the surface is free of complex texture textures.

4. Cornell Box

A model presented by Cornell University that contrasts the rendered scene with the actual scene picture to see the effect of the rendering.

The first appearance was at the SIGGRAPH meeting in 1984. Then fame.

The significance of this graph is that it can measure many factors in the rendering process, especially those related to light, such as ray tracing algorithms. Radiometric algorithm and so on.

5, Stanford Dragon

Stanforon.

This dragon is a Chinese-style dragon, not a big Western lizard.

The model of the Dragon was presented at Stanford University in 1996. It is a 3D scan of a real-life model to get. There are 871,414 triangles, much more complicated than the Stanford Bunny. It is expected that a foreign friend came to China or a Chinese student to send such a model out. Such models are expected only to be made in China.

Stanforon, like rabbits, is used to test a variety of graphical algorithms. Equivalent to an upgraded version of the rabbit.

6. Maitreya Buddha

This is not much to say, direct:

I don't know who made that. Also don't know when, should not be too early. This model is actually quite complicated.

This model also appeared several times at the SIGGRAPH meeting.

7. Summary

In addition to the above six, there are, of course, very many models.

The first Lena model belongs to the image domain, while the remaining five are in the graphics domain. Now, with the rapid development of technology, it is not difficult to transform some complex entities into computer models by scanning. So there's going to be a lot of other models coming up, but how many can be as classic as the Stanford Bunny?

Foreign researchers are very interesting, the choice of models are strange. There are all kinds of.

As for the study of Graphics, Stanford University and Cornell University have made great contributions to the development of graphics, as well as early and fruitful research. The two universities ' research on computer graphics still represents the world's highest level.

references: 1, http://www.cnblogs.com/bite_the_bullet/archive/2010/09/16/1828420.html

2. Http://en.wikipedia.org/wiki/List_of_common_3D_test_models

3. Http://zh.wikipedia.org/wiki/Utah_Teapot

4. http://baike.baidu.com/view/5223473.htm

5. Http://en.wikipedia.org/wiki/Cornell_Box

6. Http://en.wikipedia.org/wiki/Stanford_Dragon

The End

Original Practice Level: http://blog.csdn.net/szchtx/article/details/7046989

The frequently used model in computer graphics