Questions tagged [antialiasing]

Techniques for minimizing artifacts when representing a high-resolution image at a lower resolution, or rendering an image from a scene with small details.

In digital signal processing, spatial anti-aliasing is the technique of minimizing the distortion artifacts known as aliasing when representing a high-resolution image at a lower resolution. Anti-aliasing is used in digital photography, computer graphics, digital audio, and many other applications. Anti-aliasing means removing signal components that have a higher frequency than is able to be properly resolved by the recording (or sampling) device. This removal is done before (re)sampling at a lower resolution.

In signal acquisition and audio, anti-aliasing is often done using an analog anti-aliasing filter to remove the out-of-band component of the input signal prior to sampling with an analog-to-digital converter. In digital photography, optical anti-aliasing filters are made of birefringent materials, and smooth the signal in the spatial optical domain. The anti-aliasing filter essentially blurs the image slightly in order to reduce resolution to below the limit of the digital sensor (the larger the pixel pitch, the lower the achievable resolution at the sensor level). See the articles on signal processing and aliasing for more information about the theoretical justifications for anti-aliasing.

(Summarized from http://en.wikipedia.org/wiki/Spatial_anti-aliasing)

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JOGL mipmaps and texture shimmering

I've a wall and a brick texture in my OpenGL 2 scene that keeps shimmering and flashing no matter what I set. When I'm zoomed in close (and can see clearly the texture), then the flashing and shimmering stops. But when I'm zoomed out and moving…
user439441
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Why is my SVG not showing as anti-aliased?

No matter what I do, my logo won't anti-alias in my HTML page. This problem is annoying, and I can't seem to find any solution online at all. What is causing this to happen? The vector graphic shows normally when viewing it locally on Chrome, but…
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Add anti-aliasing/bandlimit for looped wav sample (NOT Fourier transform)

How to build antialiasing interpolation using c++ code? I have a simple 4096 or 1024 buffer. Of course when I play this at high frequencies I get aliasing issues. to avoid this, the signal must be limited by the bandwidth at high frequencies.…
user1195202
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how do i set UV coordination from Texture value without noise in HLSL

i have UV render pass ( RG image ) i want to set the uv pass texture value to UV Coordinate without noise when i test it the result should pixlate noise like the below image i have tested it in other shader languages like cgprogramm and…
ehsan wwe
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C# Anti Aliasing Algorithm

I want to write my own Anti Aliasing Algorithm in C#. My picture has only two colors; black and white. On Wikipedia (https://en.wikipedia.org/wiki/Spatial_anti-aliasing) I found the following pseudecode: Define function PlotAntiAliasedPoint ( number…
Tim Hovius
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Canvas blocky font rendering in JavaScript

i want to draw Blocky Font (Atari-Like) on a big Canvas. I have already made a Canvas which copies the rendered scene from a small 40-by-40 pixel canvas. But it looks like the Font is smoothed-out by the small canvas. How can I disable that?
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How to fix these jagged lines?

I want to know is there a way around to fix these jagged lines (edges of a div). I used CSS perspective and rotate to give my tiles block (shown in the image below) a 3d click effect just as happens in Windows 8 Start Menu Tiles. Rotating the divs…
Rohit Kumar
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Graphics2D - Antialias a Nearest-Neighbor along pixel borders

I have a (small) BufferedImage wich needs to be enlarged using nearest neighbor interpolation and then drawn to a Graphics2D. The Image has 1-bit alpha information and rendering it with antialiasing on and this code AffineTransform oldT =…
AlexR
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stopping anti-aliasing of textures in JOGL

I'm fairly new to JOGL and i was trying to make all of my textures have antialiasing disabled. though for some reason it only works on a texture of the Letter 'S'. here are all of my classes: Main: pastebin.com/qxCJKbbE Room:…
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Magnification Windows API - How to add Smoothing/Anti Aliasing

Context Since Windows 10 version 2004 update, the Magnifier windows application was updated. And as with every update, there are some issues with it. Since those issues might take a long time to fix, I've decided to implement my own small project…
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Xcode 8 Beta 6 text is choppy and distorted

After I installed Xcode 8 beta 6 I immediately realised that the text is very aliased. Even though it is of minor importance, I want it to be anti aliased. Zoom into the image and you will see that it is clearly choppy and aliased. My MacBook Pro…
Coding Tunes
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wu's antialiasing algorithm

function plot(x, y, c) is plot the pixel at (x, y) with brightness c (where 0 ≤ c ≤ 1) function ipart(x) is return integer part of x function round(x) is return ipart(x + 0.5) function fpart(x) is return fractional part of…
nman84
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How does Instagram have 'clean' fonts?

left is Instagram, right is mine.. Same font, Same color.. but mine (right) has some kind of RGB leak?
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