Method of and apparatus for correcting image signal

摘要

An object such as a stimulable phosphor sheet on which image information is recorded is scanned by a light beam such as a laser beam, and light bearing the image information from the object is photoelectrically detected to produce an image signal representing the image information. A monitor signal representing the light beam is divided into a high-frequency component and a low-frequency component. A corrective signal is produced multiplying a ratio of the high-frequency component to the low-frequency component by a constant. The corrective signal is then subtracted from the image signal.