BACKGROUND CORRECTION PROCESSOR, BACKGROUND CORRECTION PROCESSING METHOD, PROGRAM FOR MAKING COMPUTER EXECUTE THE METHOD AND IMAGE PROCESSOR

摘要

PPROBLEM TO BE SOLVED: To provide a background correction processor capable of following a two-dimensional fluctuation in background density and performing background elimination that causes little deterioration in image quality without increasing a variation in an image signal of a background part. PSOLUTION: In this background correction processor for outputting input image data with the input image data almost uncorrected when the intensity of an image signal of a background part of a target image is equal to that of the image signal on a reference background level, and correcting the image signal of the background level of the target image to the reference background level and outputting an almost black image signal with the image signal almost uncorrected when the intensity of the image is lower, an image data input-output conversion function when the background level C of the target image is lower than the reference background level A is represented by y = ∫(x) when the strength of the image signal on the reference background level is defined as A, the intensity of a black image signal as B, the intensity of the image signal of the background level of the target image as C, input image data as x, micro-displacement as Δ, and output data after background correction processing as y. PCOPYRIGHT: (C)2006,JPO&NCIPI