Image processing device and method for identifying an input image, and copier scanner and printer including same
First Claim
1. An image processing device to detect a specified reference pattern, comprising:
- a pattern detection device to detect a potential pattern within an image data by a rough search which matches a gradated image obtained by reducing a resolution of said image data against a gradated image of said specified reference pattern, said potential pattern being a potential match for said specified reference pattern which is predetermined;
a pattern extracting device to extract said detected potential pattern from said image data; and
a pattern matching device to match said extracted potential pattern with said specified reference pattern;
wherein said specified reference pattern comprises a number of cells having a characteristic.
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Accused Products
Abstract
An image processing device is disclosed which can reliably detect documents which may not be copied, which has a very small probability of false positives, and which can handle newly issued documents which may not be copied. In addition, an image processing scheme is disclosed which would accurately obtain the location of a pattern indicating a document to be detected; which would extract that pattern; which would determine correctly whether it is the right pattern; and which would make it difficult for anyone to tamper with the pattern. To achieve this, a specified pattern is imprinted before use on a document which may not be copied, and a previously specified number of positioning marks and dummy marks which identify the location of the pattern may also be imprinted. The device is able to detect a wide variety of documents and perform the required processing at high speed.
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Citations
12 Claims
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1. An image processing device to detect a specified reference pattern, comprising:
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a pattern detection device to detect a potential pattern within an image data by a rough search which matches a gradated image obtained by reducing a resolution of said image data against a gradated image of said specified reference pattern, said potential pattern being a potential match for said specified reference pattern which is predetermined; a pattern extracting device to extract said detected potential pattern from said image data; and a pattern matching device to match said extracted potential pattern with said specified reference pattern; wherein said specified reference pattern comprises a number of cells having a characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A copy machine to copy a transcript, comprising:
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a scanning device to scan said transcript and generate an image data of said transcript; a conversion device which is connected to said scanning device and which converts said image data into color signals for printing; a printing device, which receives said color signals from said conversion device and performs specified processing needed for printing; and an image processing device to detect a specified reference pattern in said transcript, said image processing device is connected in parallel with said conversion device, comprising; a pattern detection device to detect a potential pattern within an image data by a rough search which matches a gradated image obtained by reducing a resolution of said image data against a gradated image of said specified reference pattern, said potential pattern being a potential match for said specified reference pattern which is predetermined; a pattern extracting device to extract said detected potential pattern from said image data; and a pattern matching device to match said extracted potential pattern with said specified reference pattern; wherein said specified reference pattern comprises a number of cells having a characteristic; and a control device to control said printing device when it has determined that said specified reference pattern is present in said transcript in order to prohibit said specified processing needed for printing.
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Specification