Method of and apparatus for correcting image sharpness in image reading system
AssigneeFuji Photo Film Co., Ltd.
InventorHiroaki Yasuda
Life of this patent
Estimating the term…
Abstract
Radiation image information is read from a stimulable phosphor sheet by line sensors and corrected for shading by a shading corrector. Thereafter, the radiation image information is corrected for sharpness independently in main and auxiliary directions by a sharpness corrector using spatial filters which are selected from a spatial filter memory by a spatial filter selector according to recording or reading conditions.
Claims16
A method of correcting the sharpness of image information in an image reading system for moving a line sensor having an array of photoelectric transducers arranged in a main direction, in an auxiliary direction substantially perpendicular to the main direction with respect to a recording medium and two-dimensionally reading image information recorded on the recording medium with the photoelectric transducers, said method comprising the step of:
- correcting the sharpness of the image information read in said main direction and the sharpness of the image information read in said auxiliary direction such that the sharpness of the image information read in said main direction and the sharpness of the image information read in said auxiliary direction are substantially the same as each other.
An apparatus for correcting the sharpness of image information in an image reading system for moving a line sensor having an array of photoelectric transducers arranged in a main direction, in an auxiliary direction substantially perpendicular to the main direction with respect to a recording medium and two-dimensionally reading image information recorded on the recording medium with the photoelectric transducers, said apparatus comprising:
- a spatial filter memory for storing a spatial filter for correcting the sharpness of the image information read in said main direction and the sharpness of the image information read in said auxiliary direction such that the sharpness of the image information read in said main direction and the sharpness of the image information read in said auxiliary direction are substantially the same as each other:
- a spatial filter selector for selecting said spatial filter from said spatial filter memory according to a recording condition to record the image information on said recording medium and/or a reading condition to read the image information from said recording medium;
- and
- a sharpness corrector for correcting the sharpness of said image information with the selected spatial filter.
Dependencies are inferred from the claim text.