초록 ▼

An optical image processing method and system in a radiographic system, wherein an image of an object is produced by an image intensifier and converted to video signal by a television (TV) camera system. A liquid crystal display (LCD) is placed bewteen the image intensifier and the T.V. camera syste

An optical image processing method and system in a radiographic system, wherein an image of an object is produced by an image intensifier and converted to video signal by a television (TV) camera system. A liquid crystal display (LCD) is placed bewteen the image intensifier and the T.V. camera system at a location shifted from a focal plane of the T.V. camera system. The liquid crystal display defines plural pixels which are controllable so that light produced by the image intensifier and impinging on the plural LCD pixels can be selectively attenuated by application of selected control signals to the LCD. Control signals are generated selectively based on predetermined parameters of the radiographic system and the image. These control signals are applied to the LCD to perform selective attenuation and corresponding dynamic range compression of light passing through respective LCD pixels, thereby to perform unsharp masking of the image produced by the image intensifier using the LCD.

대표청구항 ▼

An optical image processing method in a radiographic system in which an image of an object is produced by an image intensifier and converted to video signals by means of a television (TV) camera system, comprising: placing a liquid crystal display (LCD) between said image intensifier and said T.V. c

An optical image processing method in a radiographic system in which an image of an object is produced by an image intensifier and converted to video signals by means of a television (TV) camera system, comprising: placing a liquid crystal display (LCD) between said image intensifier and said T.V. camera system at a location shifted from a focal plane of said TV camera system, said LCD defining plural pixels which are controllable so that light from said image produced by said image intensifier and impinging on said plural LCD pixels can be selectively attenuated by application of selected control signals to said LCD; and generating said control signals selectively based on predetermined parameters of said radiographic system and said image; and applying said selectively generated control signals to said LCD to perform selective attenuation and corresponding dynamic range compression of light passing through respective ones of said plural LCD pixels, thereby to perform unsharp masking of said image produced by said image intensifier using said LCD.