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Image data resolution change apparatus and process utilizing boundary compression coding of objects

  • US 4,124,871 A
  • Filed: 08/31/1977
  • Issued: 11/07/1978
  • Est. Priority Date: 08/31/1977
  • Status: Expired due to Term
First Claim
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1. Apparatus for resolution changing objects in a black and white image, the objects being patterned black picture elements stored in a bit addressable random access memory store, said apparatus comprising:

  • means for accessing the image in the memory store in a predetermined sequential order;

    means for indicating memory coordinates of each picture element in encountered objects of the image accessed from the memory store;

    border follower means responsive to said accessing means for following the connected picture elements of the borders of the object;

    multiplier means for scale factor multiplying the memory coordinates of each picture element of the encountered objects; and

    encoder means responsive to said following means for encoding the relative position of each picture element according to its multiplied memory coordinates into a machine usable coded format of the resolution changed object.

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