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Image processing apparatus, image processing method and program

  • US 10,650,294 B2
  • Filed: 01/03/2017
  • Issued: 05/12/2020
  • Est. Priority Date: 06/18/2014
  • Status: Active Grant
First Claim
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1. An image processing apparatus which converts an input image into a halftone image using a threshold value matrix including a plurality of threshold values, the image processing apparatus comprising:

  • one or more circuits configured to cause the image processing apparatus to function as;

    a target value obtaining unit configured to obtain a target value relating to a target tone for a predetermined region based on pixel values of respective pixels included in the predetermined region and the threshold values corresponding to the respective pixels of the threshold value matrix;

    an evaluation value determination unit configured to determine evaluation values for respective pixels included in the predetermined region; and

    an output value determination unit configured to determine an output value of at least one pixel included in the predetermined region in the halftone image according to the target value and the evaluation values for the predetermined region.

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