Patent ID: 8452100
Filing Date: 2013-05-28
Classification: G06K

Abstract:
1. An image processing apparatus comprising: a first feature point calculator configured to specify a consecutive component in which pixels are connected based on document image data, and to extract a centroid of the specified consecutive component as a feature point; an invert processor configured to obtain image data that a pixel value of the document image data is inverted; a second feature point calculator configured to specify a consecutive component in which pixels are connected based on the image data that the document image data is inverted, and to extract a centroid of the specified consecutive component as a feature point; a feature point adder configured to add the centroid calculated by the first feature point calculator and the centroid calculated by the second feature point calculator; a features calculator configured to obtain features of the document image data based on the centroid added in the feature point adder; a memory configured to store in advance the calculated features and the document image in association with each other; and a similarity determining component configured to determine, based on the features obtained by the features calculator and features of a document image which has been stored in advance, whether or not the document image and the stored document image are similar to each other.