Patent ID: 8050501
Filing Date: 2011-11-01
Classification: G03G,G06K

Abstract:
1. An image matching apparatus, comprising: a features extraction section for extracting features of an image from input image data, said apparatus (i) causing the features extraction section to extract the features from input image data of a target document to be matched, and (ii) determining whether or not the target document has a similar image to that of a preliminarily stored reference document based on a comparison of the features thus extracted with features of the image of the reference document; said apparatus, further comprising: a resolution conversion section that converts a resolution of the input image data into a default resolution so that the resolution of the input image data is decreased, before the features are extracted from the input image data; an N-up document determination section that determines (i) whether or not the target document is an N-up document on which plural documents are laid out, and (ii) the number of images laid out on the N-up document when it is determined that the target document is an N-up document; and a document size detection section that detects a document size of the target document, when the N-up document determination section determines that the target document is an N-up document, the resolution conversion section converting a resolution of the image data of the target document into not the default resolution but a resolution which varies depending on the number of the images laid out on the N-up document and the document size that are found and detected by the N-up document determination section and the document size detection section, respectively.