Duplicating radiographic, medical or other black and white images using laser thermal digital halftone printing

摘要

Continuous tone black and white images are duplicated using laser thermal digital halftone printing. A continuous tone black and white image signal is provided by a source (16) such as a medical imaging source. The image signal is screened with a digital halftone screen (30), such that each pixel of said image signal is represented by a predetermined matrix of micropixels, so that to produce a digital halftone image signal corresponding to the continuous tone black and white image signal. A master is created by printing (12) the digital halftone image onto a dye ablated medium (34) by means of laser thermal recording. A duplicate of the master is produced (14) by contact printing onto a duplicating medium.