所以就有一种技术叫抗锯齿下采样(Anti-aliasing/down-sampling),这个技术也比较简单,就是两个流程: 1.首先先对图片进行box filter,得到较为平滑的图片。 2. 对平滑的图片进行下采样。 卷积 卷积的计算如上图所示(图片来自),简单来讲就是我们设定好一个滤波核,然后这个滤波核从左上角到左小角进行移动,并且...
可以看到右边明显有很厉害的锯齿。 抗锯齿下采样(Anti-aliasing/down-sampling) 我们肯定希望是下采样的结果也尽可能平滑,因为那样子看起来更美观。所以就有一种技术叫抗锯齿下采样(Anti-aliasing/down-sampling),这个技术也比较简单,就是两个流程: 1.首先先对图片进行box filter,得到较为平滑的图片。 2. 对平滑...
现代计算机在渲染的时候,一般都会打开 Anti-aliasing。 💡 怎么做 AA? SSAA - Super-sample AA 超采样,假如要绘制一个 1024*768 的图像,我们把所有尺寸 double 一下,变成 2048*1536 的尺寸,得到这个 4x 的图像后,做 down sampling,做一个小的滤波,就能得到上图左边的结果。 代价大,Depth Buffer 、Frame ...
1.3 Resampling 重采样 假设采样信号的采样点坐标是整数序列,间隔为1,则有时我们需要使用重采样来使采样点间隔变为 a ,当 a > 1 时会缩小信号(downsampling),a < 1 时会放大信号(upsampling)。 对于上一节中使用的理想滤波器sinc filter恢复出的连续信号(下图左),在重构信号上使用双倍采样率进行重采样(下图...
MSAA: Multi Sampling Anti-Aliasing MLAA: Morphological Anti-Aliasing SRAA: Sub-pixel Reconstruction Anti-Aliasing 当然,AA算法的种类实在是很多,还有CSAA,ADAA,Transparent AA等等。本文就简单介绍上面四种吧。 首先,什么是走样呢?我们在现实生活中观察到的物体经常是细节非常丰富的,而大部分信息的频率远远高于人眼...
抗锯齿下采样(Anti-aliasing/down-sampling)-python-numpy 实现 抗锯齿下采样(Anti-aliasing/down-sampling)-python-numpy 实现这篇内容会涉 python 深度学习 开发语言 算法 numpy 原创 Longlongaaago 2023-06-09 14:26:39 283阅读 HTML5 Canvas disableanti-aliasingdrawing - HTML5 Canvas 如何取消反锯齿绘图 ...
Anti-aliasing works by sampling multiple points within each pixel and calculating an average color value. This process effectively blurs the edges of objects, creating the illusion of smoother lines. There are several methods of anti-aliasing, each with its own approach to achieving this smoothing...
This can be worked around by downsampling (with results similar to SSAA). Usually quite taxing on resources. Post-processing methods can be used as alternative for lesser performance hit. Doesn't counter the most extreme cases of temporal aliasing.[3] Super-Sampling Anti-Aliasing (SSAA) Also...
I also read that the antialias-effect can be achieved with downsampling. As it would be no problem for me to create the lines and curves in an array with higher resolution, this could also be an option. But I don't have any idea how to perform downsampling, and everything I can fi...
Signal processing theory tells us that optimal decimation requires low-pass filtering with a suit able cut-off frequency followed by down-sampling. In doing so, we need to remove lots of details. Subpixel-based down-sampling, taking advantage of the fact that each pixel on a color LCD is ...