Methods, apparatus and program storage device for removing...

G - Physics – 06 – T

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G06T 5/00 (2006.01) G06T 5/20 (2006.01) H04N 1/38 (2006.01) H04N 1/409 (2006.01)

Patent

CA 2211350

Methods and apparatus for removing scratch and wire noise from digitized images handle the difficult case of non-uniformly shaded images which is the common situation in real applications. The methods and apparatus also utilize a soft edge noise mask to allow a smoother blending of the reconstructed noise and the image around the noise. wire noise removal from digitized images wherein a scratched portion of a digitized image which requires repair or noise removal is identified and a binary mask is generated which distinguishes the defined scratched portion from the other portions of the digitized image. The methods and apparatus utilize both the spatial and frequency domains to effectively reconstruct many contiguous noisy pixels, reconstruct textures even when they are large featured, maintain sharpness and maintain continuity of features across a noisy region. A set of instructions for executing the methods is contained in a program storage device. Also, a recording media contains digital data generated using the methods.

L'invention est constituée par des méthodes et un appareil servant à éliminer le bruit dû aux rayures dans les images qui peuvent traiter les cas difficiles d'images à ombrage non uniforme, cas qui sont courants dans les applications réelles. Les méthodes et l'appareil de l'invention utilisent un masque de produits à bordure graduelle pour permettre une fusion plus harmonieuse du bruit reconstruit et de l'image. La partie de l'image numérisée comportant un bruit dû à des rayures est délimitée et un masque binaire distinguant la partie rayée des autres parties de l'image numérisée est créé. Les méthodes et l'appareil de l'invention utilisent les domaines spatial et fréquentiel pour reconstruire de nombreux pixels bruités contigus, reconstruire des textures même quand celles-ci ont des caractéristiques étendues, maintenir la netteté de l'image et maintenir la continuité des caractéristiques dans les zones bruitées. Des instructions d'utilisation des méthodes de l'invention sont fournies dans un dispositif de stockage de programmes. Un support d'enregistrement contenant des données numériques produites à l'aide des méthodes de l'invention est également fourni.

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