title: Image calibration of laser digitizers, printers, and gray-scale displays.
abstract: Laser film digitizers, interactive gray-scale monitors, and laser film printers are necessary to transmit digital image information. These devices must be standardized so that hard- and soft-copy images are as similar as possible. Standardization of appropriate calibration procedures is necessary to attain this goal. Radiographs are converted into digital data representations by a laser film digitizer. These representations (and those obtained with other modalities) are transferred to a laser film printer or to an interactive monitor with gray-scale display. To obtain the best gray-level fidelity, printer output optical densities should be identical to those of the input film. Laser printers should be calibrated regularly to ensure uniform results. A gray-scale controller functions as an adjunct to the host computer and can automate the calibration process. Gray-scale controller functions may someday be incorporated into an accelerator or array-processor board.
authors.affiliation: Department of Diagnostic Radiology, Bell Memorial Hospital, University of Kansas Medical Center, Kansas City 66103.
authors.forename: E L
authors.initials: EL
authors.lastname: Siegel
authors.forename: A W
authors.initials: AW
authors.lastname: Templeton
authors.forename: L T
authors.initials: LT
authors.lastname: Cook
authors.forename: D A
authors.initials: DA
authors.lastname: Eckard
authors.forename: L A
authors.initials: LA
authors.lastname: Harrison
authors.forename: S J
authors.initials: SJ
authors.lastname: Dwyer
mesh_terms: D002138:Calibration; D003116:Color; D003199:Computer Systems; D003626:Data Display; D003720:Densitometry / Q000295:instrumentation; D004867:Equipment Design; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D007834:Lasers; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation