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problem 1: Compare the object-space and image-space visibility tests in synthesizing an image for display.

describe one visibility test in detail.

problem 2: When scan-converting items for display, a Z-buffer is sometimes employed to avoid some sorting. Outline its operation and limitations. The use of an A-buffer will enhance matters. Describe why.

problem 3: A certain image comprises a number Q of differently colored pixels. There are not adequate different pixel values accessible to represent these and so a method of approximation is required.

describe an approach and comment on its performance.

problem 4: RasterOp is the name given to operation that produces, from a number of raster’s of pixel values, another raster of pixel values.

describe appropriate versions which could be used:

a) To move a window on screen while preserving the background.

b) To blend two images in proportions given by a mask.

Computer Graphics, Computer Science

  • Category:- Computer Graphics
  • Reference No.:- M98915

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