Patent ID: 9715636
Date: 2017-07-25
CPC Classifications: B41J,G06K,H04N

Claim:
1. An image processing apparatus comprising a processor executing a program to function as: an acquisition unit configured to acquire image data resulting from reading an image printed sequentially in a first direction; a setting unit configured to set a division size in the first direction and a second direction of a division area for dividing the image data, the second direction crossing the first direction, as well as a shift amount in the first direction and the second direction of the division area; a processing unit configured to perform a predetermined process including an averaging process on the image data according to the division size and the shift amount, a quantization process for quantizing a value obtained by performing the averaging process on image data in each division area shifted in accordance with the shift amount, and an addition process for adding values obtained by the quantization process; and an extraction unit configured to extract a unique portion from image data on which the predetermined process has been performed; wherein the setting unit sets (i) the division size greater in the first direction than in the second direction; and/or (ii) the shift amount greater in the first direction than in the second direction.