in computer graphics, refers to altering the size of a sprite to make the sprite appear nearer or farther from the player's point of view. It is a transformation that change the size or shape of an object . Scalling with respect to horizion can be carried out by multipling the corrdinate value x,y of a polygon , each end point of a line by scalling factor Sx and Sy to to produce the corrdinate x',y' .
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In case of raster image scaling results in lost of graphics as the image is extended. But scaling is most applicable to vector graphics where the objectresolution is not affected by scaling.