Scan image processing

Details Scan image processing Scan image processing

H - Electricity

04

N

H04N 1/32 (2006.01) H04N 1/19 (2006.01) H04N 1/401 (2006.01) H04N 1/407 (2006.01)

Patent

CA 2077326

The method of scanning a document by providing a test patch to be scanned, initially scanning the test patch and storing the signal response of each reading element to the test patch in a pixel threshold table, providing a document to be scanned, scanning the document and comparing the signal response of each reading element with the corresponding signal response in the pixel threshold table, and printing a mark or not printing a mark in response to the comparison for each reading element. The method includes an extended threshold table to cover halftone cells.

L'invention est une méthode de balayage de documents qui est constituée par les opérations suivantes : production d'une zone de test à balayer, balayage initial de cette zone de test et stockage du signal de réponse à la zone de test de chaque élément de lecture dans une table de seuils de pixel, production d'un document à balayer, balayage de ce document et comparaison du signal de réponse de chaque élément de lecture avec le signal de réponse correspondant contenu dans la table de seuils de pixel et impression ou non impression d'une marque en réponse à la comparaison pour chaque élément de lecture. La méthode inclut une table de seuils étendue pour couvrir les cellules en simili.

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