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Computer Graphics Zooming
Computer Graphics Zooming with Computer Graphics Tutorial, Line Generation Algorithm, 2D Transformation, 3D Computer Graphics, Types of Curves, Surfaces, Computer Animation, Animation Techniques, Keyframing, Fractals etc.
Computer Graphics ZoomingZooming is a transformation often provided with an imaginary software. The transformation effectively scales down or blows up a pixel map or a portion of it with the instructions from the user. Such scaling is commonly implemented at the pixel level rather than at the coordinates level. A video display or an image is necessarily a pixel map, i.e., a collection of pixels which are the smallest addressable elements of a picture. The process of zooming replicates pixels along successive scan lines. Example: for a zoom factor of two Each pixel value is used four times twice on each of the two successive scan lines. Figure shows the effect of zooming by a factor of 2. 
Such integration of pixels sometimes involves replication using a set of ordered patterns, commonly known as Dithering. The two most common dither types are:
There are widely used, especially when the grey levels (share of brightness) are synthetically generated. 
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