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彩虹色斑光效模拟 – 译学馆
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彩虹色斑光效模拟

Iridescent Light Simulations | Two Minute Papers #165

亲爱的学霸们 这里是由Károly Zsolnai-Fehér带来的两分钟论文
Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér.
还记得童年我们钟爱的 五彩斑斓的泡泡
From many fond childhood memories, most of us are quite fond of the colorful physical
和颜色漂亮的油水混合物吗
appearance of bubbles and fuel-water mixtures.
但我们并不了解这种奇怪的现象
We also know surprisingly little about this peculiar phenomenon where the color of an
一个物体的颜色随着我们头的转动 或者光线的变化而改变
object changes when we either turn our head or change the lighting.
这种现象通常色彩丰富 物理学家称其为彩虹色斑
This happens in a very colorful manner, and physicists like to call this iridescence or
或者虹彩现象
goniochromism.
更加鲜为人知的是 如果我们尝试用光模拟程序模拟出一张皮革制品的图像
What is even less known, is that if we try to use a light simulation program to make an image with leather,
我们会惊讶地发现 这张图像也会显示出明显的彩虹色斑效果
we’ll be surprised to see that it also shows a pronounced goniochromatic effect.
比这个还要鲜有人知的是 许多鸟类 昆虫 矿物 贝类
An even more less known fact is that quite a few birds, insects, minerals, sea shells,
甚至还有一些水果 都有彩虹色斑的效果
and even some fruits are iridescent as well.
我在视频描述里放了些很酷的链接 是本文的拓展阅读 你们可以看看
I’ve added links to some really cool additional readings to the video description for your enjoyment.
这种效果是由物体将不同颜色的光散射至不同方向而产生的
This effect is caused by materials that scatter different colors of light in different directions.
一束白色入射光被散射至无数
A white incoming light is therefore scattered not in one direction, but in a number of different
不同方向 按颜色依次排列
directions, sorted by their colors.
所以我们才能看到这些人见人爱的 美丽的 彩虹色的图案
This is why we get these beautiful, rainbow-colored patterns that we all love so much.
现在 我们知已经道了什么是彩虹色斑 下一步明显是
Now that we know what iridescence is, the next step is obviously to infuse our light
把这个酷炫的效果用光模拟程序展现出来
simulation programs to have this awesome feature.
这篇论文主要讲用微平面模拟这个效果 微平面是粗糙物体表面上
This paper is about simulating this effect with microfacets, which are tiny microstructures
一个个小的微型结构
on the surface of rough objects.
有了这些小的微型结构 我们才能把彩虹色斑薄膜加在虚拟物体上
And with this, it is now suddenly possible to put a thin iridescent film onto a virtual
制造出真实的图像效果
object and create a photorealistic image out of it.
如果你对数学感兴趣 并且想了解利用频率空间的傅里叶变换进行光谱合成的话
If you are into math and would like to read about some tasty spectral integration in the
那么这篇论文很适合你
frequency space with Fourier transforms, this paper is for you.
如果你不是很擅长数学 那一定要看
If you are not a mathematician, also make sure to have a look because the production
因为这篇论文的质量高到超乎想象
quality of this paper is through the roof.
从方法 推导 到对比都无可挑剔
The methodology, derivations, comparisons are all really crisp.
爱死它了
Loving it.
如果你看一眼 你就能知道做出这种质量的作品
If you have a look, you will get a glimpse of what it takes to create a work of this
需要什么
quality.
这是我这段时间以来见过的 在表现逼真图像方面 最棒的论文
This is one of the best papers in photorealistic rendering I’ve seen in a while.
与此同时 我从大家那里收到的反馈也越来越多
In the meantime, I am getting more and more messages from you Fellow Scholars who tell
他们是怎么因为这个视频系列而改变人生
their stories on how they chose to turn their lives around and started studying science
走上研习科学之路的故事
because of this series.

Wow.
我觉得受宠若惊 我不知道要如何表达我的喜悦之情
That’s incredibly humbling, and I really don’t know how to express my joy for this.
我总是说 能成为未来的一分子是很棒的事 我也很高兴能见到
I always say that it’s so great to be a part of the future, and I am delighted to see that
你们中的一些人想要成为未来的一分子 不仅仅是作为旁观者 而是作为科研人员
some of you want to be a part of the future and not only as an observer, but as a research scientist.
这个系列视频的冲击性的效果 比我预想的
This sort of impact is stronger than the absolute best case scenario I have ever dreamed of
还要好上很多
for the series.
感谢收看 也感谢大家的支持 我们下次见
Thanks for watching and for your generous support, and I’ll see you next time!

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视频概述

如何用光模拟程序制作出观感真实的彩虹色斑效果?带你走近真实感图形绘制

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