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How are line segments and polygons in world-space converted into illuminated pixels on the screen?

Note coversie large complex objects are often reduced down to a large number of triangles i. The application of scan conversion is wide and covers video projectors, cinema equipment, TV and video capture cards, standard and HDTV televisionsLCD monitors, radar displays and many different aspects of picture processing.

It may also be performed using a specialized scan converter vacuum tube. There are two distinct methods for changing a picture’s data rate:. A scan converter can be made in its basic structure using some high speed integrated circuits congersie a circuit board however there are some integrated circuits which perform this function plus other picture processing functions like scissoring, change of aspect ratio and … tekstverwerkingg easy to use example was SDA Display technology Television terminology Video Video signal.


August Learn how and when to remove this template message. This article needs additional citations for verification.

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To generate the outline of a triangular 2D polygon in world-space using OpenGL a programmer can write code like the following: Views Read Edit View history. Please help improve this article by adding citations to reliable sources.

Calculate which pixels will be highlighted using the midpoint algorithm to draw a line from 5,8 to 9, Articles lacking in-text citations from August All articles lacking in-text citations Articles needing additional references from August All articles needing additional references Articles with multiple maintenance issues. In a language such as OpenGL a programmer can generate a 2D line segment in world-space with code like the following: This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations.

This conversion is done using large numbers of delay cells and is appropriate for analog video.

Retrieved from ” https: Timing, interference between digital and analog signals, clocks, noise and exact synchronization have important roles convresie the circuit.

Retrieved August 19, Please help to improve this article by introducing more precise citations. This allows a logical separation of the world from the view of that world. For conversion of vector images to raster images, see Rasterisation.

Scan conversion

Please help improve it or discuss these issues on the talk page. This scene is then rendered into the frame buffer. In this convereie, a picture is stored in a line or frame buffer with n1 speed data rate and is read with n2 speed, several picture processing techniques are applicable when the picture is stored in buffer memory including kinds of interpolation from simple to smart high order comparisons, motion detection and … to improve the picture quality and prevent the conversion artifacts.


The basic improvement of this algorithm over the purely braindead one is that instead of calculating Y for each X from the equation of a line one multiplication and one additionwe will calculate it from the previous Y by just adding a fixed constant one addition only. In a language such as OpenGL polygons are very restricted to improve speed: Learn how and when to remove these template messages.

The process of representing continuous graphics objects tekstgerwerking a collection of discrete pixels is called scan conversion. By using this site, you agree to the Terms of Use and Privacy Policy.

From Wikipedia, the free encyclopedia. This is the topic we will discuss now. We like to think about a scene as mathematical tekatverwerking in a world-space. This article has multiple issues.