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O'Reilly Platform
book
量子计算机编程:从入门到实践
by
Eric R. Johnston
,
Nicholas Harrigan
,
Mercedes Gimeno-Segovia
July 2021
Beginner to intermediate
274 pages
7h 10m
Chinese
Posts & Telecom Press
Content preview from
量子计算机编程:从入门到实践
177
第
11
章
量子超采样
从基于像素的冒险游戏到逼真的电影效果,计算机图形学一直处于创新前沿。
量子图像处
理
(
quantum
image
processing
,
QIP
)采用
QPU
来增强图像处理能力。尽管还处于非常早
期的阶段,但
QIP
技术已经出现了一些令人兴奋的用例。这些用例展现了
QPU
如何影响
计算机图形学领域。
11.1
QPU
能为计算机图形学做什么
本章将探讨一个特殊的
QIP
用例——
量子超采样
(
quantum
supersampling
,
QSS
)。如图
11-1
所示,
QSS
利用
QPU
对计算机图形学中的超采样任务进行了有趣的改进。超采样是
一种传统的计算机图形学技术,它通过对像素进行选择性采样,将计算机以高分辨率生成
的图像压缩为低分辨率图像。在根据计算机生成的图像生成可用输出图形的过程中,超采
样是重要的一步。
QSS
最初是作为使用
QPU
加速
超采样的一种方法而开发的,不过以这个目标来衡量,它
失败了。然而,对结果的数值分析揭示了一些有趣的事情。虽然
QSS
的最终图像质量(以
像素误差衡量)与现有的传统方法差不多,但输出图像具有不同的优点。
图
11-1
显示,传统采样图像和
QSS
采样图像中的平均像素噪声
1
大致相同,但噪声的特征
非常不同。在传统采样图像中,每个像素点都有一些噪声。在
QSS
采样图像中,一些像素
的噪声很大(黑白斑点),而其他像素则是完美的。
注
1
:
像素噪声是指采样结果和理想结果之间的差异。
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ISBN: 9787115566355