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Topic: Antialiasing

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	Antialiasing Tutorial
		antialiasing affects the perceived width of lines -- more aa will give the impression of a thicker line, and making the aa colors closer to the actual line color will also 'thicken' the line.
		this is simple: you just add more or less antialiasing adjacent to the line, and tweak its brightness, to achieve the appearance of the line thickness you want, and the smoothing of the line.
		this illustrates two points: good antialiasing relies on you having a good idea of the shape you want to convey[ here, there is no clear shape], and, don't antialias when surrounded on all 4 sides by same colored pixels.
	noadi.cywh.com /antialiasing.html (1030 words)

	GameDev.net - Fast Antialiasing
		The basic premise of Wu antialiasing is almost ridiculously simple: As the algorithm steps one pixed unit at a time along the major (longer) axis of a line, it draws the two pixels bracketing the line along the minor acis at each point.
		You might expect that the implementation of Wu antialiasing would fall into two distinct areas: tracing out the line (that is, finding the appropriate pixel pairs to draw) and calculating the appropriate weightings for each pixel pair.
		Notes on Wu Antialiasing Wu antialiasing can be applied to any curve for which it's possible to calculate at each step the positions and intensities of two bracketing pixels, although the implementation will generally be nowhere near as efficient as it is for lines.
	www.gamedev.net /reference/articles/article382.asp (2933 words)

	Antialiasing and Transparency Tutorial
		In the context of rasterizing images, antialiasing refers to the reduction of the jagged borders between colors.
		Because we were antialiasing, the image was created with fl foreground pixels, white background pixels, and many levels of gray in between.
		Antialiasing and transparency are two tools that depend upon each other to get good results.
	www.lunaloca.com /tutorials/antialiasing (1837 words)

	Tutorial: antialiasing, transparency, and the WWW
		Antialiasing smooths out the discretization* of an image by padding pixels with intermediate colors.
		We didn't use transparency in the antialiasing example: the image is just surrounded in white which blends into the color of the page.
		Recall that antialiasing works by interpolating* between the foreground and the background (like the grays between fl and white).
	www.lunaloca.com /tutorials/antialiasing-original (1189 words)

	SEGGER Microcontroller Systeme GmbH, Embedded Software Solutions - emWin, Antialiasing
		Antialiasing is the smoothing of lines and curves.
		Antialiasing smoothes curves and diagonal lines by "blending" the background color with that of the foreground.
		The general purpose of using antialiased fonts is to improve the appearance of text.
	www.segger.com /emwingsc_antialiasing.html (552 words)

	nV News - NVIDIA GeForce3 Preview - Antialiasing Performance - OpenGL
		Antialiasing methods are varied in their implementation as to how they eliminate the affects of aliasing.
		With multisampling, the graphics processing unit is aware that antialiasing is being used and carries with it the samples needed to generate a final pixel color.
		Edge antialiasing with multisampling is comparable to that of supersampling although it's not as effective as supersampling on curved surfaces.
	www.nvnews.net /previews/geforce3/antialiasing.shtml (1081 words)

	3.2 Antialiasing (Site not responding. Last check: 2007-10-09)
		Antialiasing of a point, line, or polygon is effected in one of two ways depending on whether the GL is in RGBA or color index mode.
		The reason is that high-quality antialiasing may take into account perceptual issues as well as characteristics of the monitor on which the contents of the framebuffer are displayed.
		In some implementations, varying degrees of antialiasing quality may be obtained by providing GL hints (section 5.6), allowing a user to make an image quality versus speed tradeoff.
	www.cs.bham.ac.uk /resources/ums/OpenGL/glspec/node43.html (517 words)

	Micrium Products : GUI : µC/GUI Antialiasing (Site not responding. Last check: 2007-10-09)
		Increasing the antialiasing factor further does not improve the result dramatically, but increases the calculation time.
		While the effect of using high-quality antialiasing will be more visually pleasing than low-quality, computation time and memory consumption will increase proportionally.
		When drawing items using antialiasing, the same coordinates are used as for regular (non-antialiasing) drawing routines.
	www.ucos-ii.com /contents/products/GUI/Antialias.htm (491 words)

	Antialiasing methods
		Antialiasing methods were developed to combat the effects of aliasing.
		In this algorithm, each pixel is given an intensity depending on the area of overlap of the pixel and the line.
		So, due to the blurring effect along the line edges, the effect of antialiasing is not very prominent, although it still exists.
	www.cs.wpi.edu /~matt/courses/cs563/talks/antialiasing/methods.html (673 words)

	IsoCalc.com - Tutorials: Antialiasing Explained
		Antialiasing is a method of representing perfect, continuous vectors on imperfect, discontinuous display devices so that they look as perfect as possible.
		The actual shade of mid-colour that is used in antialiasing is determined by the percent of each pixel that is of one colour or another, the percentage tints of those colours are then mixed.
		Another factor is that for very thin lines, the antialiased representation may be as much as two or three pixels wide at some points, it may be only one pixel wide at others.
	www.isocalc.com /tutorials/antialias.htm (1080 words)

	Type: Antialiasing (Site not responding. Last check: 2007-10-09)
		ANTIALIASING is a technique for making the edges of letters look smooth on screen by rendering some pixels in shades of gray.
		Antialiasing is generally helpful for presenting text on screen at large sizes (12 pixels and higher), but it can make small text difficult to read.
		Some designers prefer to use bitmap fonts, which are designed to be displayed without antialiasing, for small text on screen.
	www.designwritingresearch.org /thinkingwithtype.com/letter/antialiasing.htm (96 words)

	Antialiasing
		Antialiasing for real-time applications is supported in graphics hardware, but its quality is limited by many factors, including a small number of samples per pixel, a narrow filter support, and the use of a simple box filter.
		In this article, I describe a simple method that improves the quality of edge antialiasing by redrawing silhouette edges using prefiltered lines.
		One problem with the antialiasing of commodity graphics hardware is that most of them consider samples only within a single pixel area.
	people.csail.mit.edu /ericchan/articles/prefilter (2186 words)

	accelenation.com
		From this it is clear that the 1-in-2 rotation of samples distributes the three intermediate shades evenly along the edge, producing the optimum smoothing of the edge as it descends through this row of pixels.
		However, the purpose of sub-sample antialiasing is not purely to improve the appearance of edges, but to also render small shapes in a consistent and recognizable form.
		In truth, sub-sample antialiasing is merely trying to maintain a consistent appearance should that tree fall in the centre of a single pixel, between two pixels, or between four pixels.
	accelenation.com /?ac.id.227.1 (1797 words)

	Menus with Beauty and Brains 3: Production Graphics with Wendy Peck at webreference.com
		To overcome this effect, antialiasing mixes the object color with the color behind the object to create pixels of mixed color where they meet.
		This setting is the least invasive antialiasing you can apply, and is the one that I use most often.
		In each sample, the antialiased sample is shown first, with no antialiasing in the second.
	www.webreference.com /graphics/column44 (934 words)

	Antialiasing Image Patterns For GeForce3
		Here is the NVIDIA description of generic solutions for antialiasing of images on PC.
		From the theory simulating results of the antialiasing image patterns for GeForce3 showed in Table 1, it could be found that "4x AA" has the best antialiasing image quality, while "Quincunx AA" has better antialiasing image quality than "2x AA".
		Comparing with the antialiasing screenshots that have been posted on Tomshardware, Rivastation and Hardocp by further magnifying, the patterns in Table 1 come close the real ones considerably.
	www.geocities.com /tnaw_xtennis/NV20-9.htm (384 words)

	IsoCalc.com - Tutorials: Antialiasing Examples from Real Applications
		The antialiasing samples below are divided into two groups: sans serif text, which demonstrates regular, uniform-weight lines and shapes, and serif text, which demonstrates lots of thing detail which is easily lost.
		My selection is not all down to quality of antialiasing: other factors come into play in flexibility and simplicity of creating the raster images, or bitmaps.
		Its antialiasing is not very impressive, either, as it is far too dark and heavy.
	www.isocalc.com /tutorials/antialias-examples.htm (1405 words)

	What is antialiasing? - A Word Definition From the Webopedia Computer Dictionary
		In computer graphics, antialiasing is a software technique for diminishing jaggies - stairstep-like lines that should be smooth.
		Jaggies occur because the output device, the monitor or printer, doesn't have a high enough resolution to represent a smooth line.
		Antialiasing reduces the prominence of jaggies by surrounding the stairsteps with intermediate shades of gray (for gray-scaling devices) or color (for color devices).
	www.webopedia.com /TERM/a/antialiasing.html (298 words)

	NVIDIA GeForce 7800 GTX 256MB PCI-E Part 4: Transparent antialiasing
		NVIDIA improved antialiasing modes, that were already available in NV4x, having added gamma correction as well as transparent antialiasing modes to the new generation of its video chips.
		It should be added that activating the new antialiasing modes is completely orthogonal to the AA level, chosen by an application or forced by a user in the control panel.
		In this case transparent antialiasing is successfully applied to the multisampling part.
	www.digit-life.com /articles2/video/g70-part4.html (1193 words)

	MERL – TR2000-021 – Antialiasing with Line Samples
		An antialiased image is produced by convolving the scene with an antialiasing filter and sampling the result, or equivalently by solving the antialiasing integral at each pixel.
		The segment is intersected with scene polygons, visible subsegments are determined, and the antialiasing integral is computed with those subsegments and a one-dimensional reparameterization of the integral.
		Complex scenes can be antialiased by combining multiple line samples weighted according to the orientation of the edges they intersect.
	www.merl.com /reports/TR2000-21 (242 words)

	Antialiasing and Raytracing (Site not responding. Last check: 2007-10-09)
		Antialiasing is the name given to the process that attempts to eliminate or reduce the impact of aliasing artifacts in rendered images.
		Antialiasing algorithms can be classified as either analytic or discrete.
		The method antialiases scenes through the use of a special sample distribution which replaces most aliased image artifacts with noise of the correct average intensity.
	astronomy.swin.edu.au /pbourke/rendering/aliasing (888 words)

	Making your graphics look great with antialiasing
		Antialiasing is the smoothing or blurring of the images edges.
		Antialiasing can include adjusting pixel positions or setting pixel intensities so that there is a more gradual transition between the color of a line and the background color.
		Indexed color mode defines a set number of colors (a palette) that can be used in the image and antialiasing essentially creates colors in-between the colors of an image and it's background.
	www.bignosebird.com /antialias.shtml (478 words)

	About antialiasing (Site not responding. Last check: 2007-10-09)
		Antialiasing improves the quality of your images but can slow down performance.
		Antialiasing does not increase the weight of an object but it requires processing power to smooth the jaggies.
		Only the objects whose Antialiasing parameter is on are rendered with antialisasing.
	www.mindavenue.com /en/support/onlineHelp/09_web32.htm (185 words)

	Full-Scene Antialiasing (DirectX 9.0 C++) (Site not responding. Last check: 2007-10-09)
		Full-scene antialiasing refers to blurring the edges of each polygon in the scene as it is rasterized in a single pass; no second pass is required.
		Full-scene antialiasing is done in Direct3D by using multisampling on each pixel.
		When multisampling is enabled, all subsamples of a pixel are updated in one pass but when used for other effects that involve multiple rendering passes, the application can specify that only some subsamples are to be affected by a given rendering pass.
	msdn.microsoft.com /library/en-us/directx9_c/directx/graphics/programmingguide/advancedtopics/pixelpipe/antialiasing/fullsceneantialiasing.asp?frame=true (538 words)

	Marko Karppinen \| On antialiasing type
		Sunday, 14 April 2002 — Now that everyone and their brother are downloading Chimera and getting on the non-grid-fitted antialiasing craze (even Unix Mozillans are getting their share with this Xft patch), let’s take a look under the hood and see what this means for online typography.
		Grid-fitting, in the context of antialiased type, is the process of making sure that the principal strokes of a letter — the stems and the arms — fall on exact pixel boundaries.
		Whether or not antialiasing was turned on, the systems insisted on using 12-pixel hints for rendering a 12-pixel letter.
	www.markokarppinen.com /20020414.html (585 words)

	Usability First: Usability Glossary: antialiasing
		When a line is drawn on a computer screen, the common way to draw it in the early days was with fl and white pixels on a grid -- the line thus had jagged edges.
		Antialiasing is a method for drawing the line using intermediate gray pixels to smooth it out.
		Antialiasing can be used for any graphic shape and is used to render letters also (sometimes called "font smoothing").
	www.usabilityfirst.com /glossary/term_508.txl (125 words)

	CGTalk - Get rid of Jagged Lines without Antialiasing
		When I use the Camera Antialiasing, all of my objects loose their sharpness and look too washed out, fuzzy....
		No, you decrease antialiasing, increase the resolution x 2, and scale the image back down to the original resolution in PS.
		Using adaptive antialiasing should leave your image mostly pure, except for the parts that fall within the threshold you set yourself.
	forums.cgsociety.org /printthread.php?t=69459 (706 words)

	Accuview Antialiasing (Site not responding. Last check: 2007-10-09)
		The NVIDIA Accuview Antialiasing (AA) subsystem tackles difficult antialiasing problems by providing a unique and flexible technology architecture that delivers high-quality graphics at unbeatable levels of performance.
		For the first time, end users can choose high-resolution antialiasing as their default display mode, without suffering any performance degradation in their favorite games and applications.
		With Accuview technology, antialiased operations can now be the default mode of all PC users, delivering unprecedented visual quality without any degradation in performance.
	www.nvidia.com /object/feature_accuview.html (288 words)

	High-Resolution Antialiasing
		While other antialiasing solutions and their methods have been offered before, only GeForce3 can offer the unique combination of high resolutions and high frame rates in combination with high-quality antialiasing.
		A graphics processor that uses supersampling renders the screen image at a much higher resolution than the current display mode, and then scales and filters the image to the final resolution before it is sent to the display.
		This animation demonstrates the visual difference between when there is no antialiasing and when GeForce3's Quincunx antialiasing is turned on.
	www.nvidia.com /object/feature_hraa.html (671 words)

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