Image processing device, image processing method, storage...

G - Physics – 06 – T

Patent

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Details

G06T 5/10 (2006.01) A61B 6/00 (2006.01) G06T 1/00 (2006.01) G06T 5/00 (2006.01) G06T 5/40 (2006.01) H04N 1/407 (2006.01) H04N 1/409 (2006.01) H04N 5/20 (2006.01) H04N 7/26 (2006.01)

Patent

CA 2427462

There are disclosed an image processing apparatus and method, and the like, which can obtain a high-quality image, the dynamic range or partial pixel value range of which has been changed while suppressing or avoiding collapse of the edge structure of an image or generation of overshoot. Also, there are disclosed an image processing apparatus and method, and the like, which can obtain a high-quality image, desired spatial frequency components of which have been emphasized or suppressed while suppressing or avoiding collapse of the edge structure of an edge portion contained in an objective image. For example, an image processing apparatus includes tone conversion means for executing tone conversion of an image, frequency transformation means for decomposing the image that has undergone tone conversion by the tone conversion means into frequency components of a plurality of frequency bands, and component conversion means for converting the frequency components of the plurality of frequency bands obtained by the frequency transformation means, on the basis of values of the frequency components and the tone conversion characteristics of the tone conversion means.

Dispositif et procédé de traitement d'images permettant d'obtenir une excellente image à modification de la plage dynamique ou de la plage de valeur de pixel partielle tout en évitant ou en supprimant l'effondrement de la structure de bord de l'image ou un dépassement. La présente invention concerne également un autre dispositif et un autre procédé de traitement d'images permettant d'obtenir une excellente image dont la composante de fréquence spatiale désirée est accentuée ou supprimée tout en évitant ou en supprimant l'effondrement de la structure de la partie bord contenue dans l'image à traiter. Par exemple, ledit dispositif de traitement d'images comporte un moyen de conversion de gradation pour convertir la gradation d'une image, un moyen de conversion de fréquence pour décomposer l'image convertie en gradation par le moyen de conversion de gradation en composantes de fréquence d'une pluralité de bandes de fréquence et un moyen de conversion de composantes pour convertir les composantes de fréquence des bandes de fréquence acquises par le moyen de conversion de fréquence, selon les valeurs des composantes de fréquence et les caractéristiques de conversion de gradation du moyen de conversion de gradation.

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