초록 ▼

Radiation images recorded serially on a plurality of sheets overlapping partially are positioned accurately. An image positioning processing apparatus comprises overlap area detection means for detecting an overlap area between two radiation images overlapping partially, rotation correction means fo

Radiation images recorded serially on a plurality of sheets overlapping partially are positioned accurately. An image positioning processing apparatus comprises overlap area detection means for detecting an overlap area between two radiation images overlapping partially, rotation correction means for rotating, based on the overlap area, a lower image out of the two images, template setting means for setting a plurality of templates within the overlap area of the lower image, rank setting means for setting a reliability rank for each of the templates, matching position determining means for determining, based on the ranks of the templates, a matching position at which an image portion within each of the templates almost matches up with an image portion within the overlap area of an upper image, and positioning means for carrying out positioning of the two images based on the matching position having been determined.

대표청구항 ▼

Radiation images recorded serially on a plurality of sheets overlapping partially are positioned accurately. An image positioning processing apparatus comprises overlap area detection means for detecting an overlap area between two radiation images overlapping partially, rotation correction means fo

Radiation images recorded serially on a plurality of sheets overlapping partially are positioned accurately. An image positioning processing apparatus comprises overlap area detection means for detecting an overlap area between two radiation images overlapping partially, rotation correction means for rotating, based on the overlap area, a lower image out of the two images, template setting means for setting a plurality of templates within the overlap area of the lower image, rank setting means for setting a reliability rank for each of the templates, matching position determining means for determining, based on the ranks of the templates, a matching position at which an image portion within each of the templates almost matches up with an image portion within the overlap area of an upper image, and positioning means for carrying out positioning of the two images based on the matching position having been determined. d discriminating means has judging means for judging continuity of an edge. 6. An apparatus according to claim 1, wherein said calculating means refers to a plurality of different predetermined areas and peripheral areas of the predetermined areas and calculates the isolated amount based on the number of pixels having a predetermined value in each of the areas. 7. An image processing method in which a line image portion is extracted, comprising the steps of: calculating an isolated amount of a pixel value in each of plural areas respectively having different sizes, the isolated amount representing isolation of a pixel with respect to plural directions in the plural areas; adding isolated amounts calculated for at least one of the plural areas to obtain one or more sums; comparing one or more sums of isolated amounts with one or more respective predetermined values; discriminating a dot image portion according to an output value of said comparing step; and extracting the line image portion from an image including plural image portions respectively having different attributes, according to a result obtained in said discriminating step. 8. A computer-readable medium containing program codes for extracting a line image portion, said medium containing program codes for performing the steps of: calculating an isolated amount of a pixel value in each of plural areas respectively having different sizes, the isolated amount representing isolation of a pixel with respect to plural directions in the plural areas; adding isolated amounts calculated for at least one of the plural areas to obtain one or more sums; comparing one or more sums of isolated amounts with one or more respective predetermined values; discriminating a dot image portion according to an output value of said comparing step; and extracting the line image portion from an image including plural image portions respectively having different attributes, according to a result obtained in said discriminating step.