Concentration of the image field which is amendment manner of image concentration and

摘要

PROBLEM TO BE SOLVED: To provide a method for measuring image density by which exact density values similar to the density value in the central part of the image region may be obtained even at the ends of an image region in the method for measuring the image density for measuring the densities of the image on a carrier by an optical scanner having a light emitting part and elements for detecting the quantity of the light emitted from the light emitting part and reflected at the surface of the image. SOLUTION: This method for measurement has a first stage for previously specifying the influence that the flare formed by the reflection of the light emitted from the light emitting part at the parts adjacent to the image and infiltration of the light into the image region exerts on the measured value of the density, a second stage for measuring the density of the image by a light quantity measuring means 91 and a third stage for correcting the measured density value obtained by the light quantity measuring means 91 in the second stage in accordance with the influence degree specified in the first stage.