AUTOMATIC HISTOGRAM SPECIFICATION BASED ON FUZZY SET OPERATIONS FOR IMAGE-ENHANCEMENT

In this letter, an automatic histogram specification method is propose d for image enhancement. Parameterized Fuzzy Number (PFN) is adopted f or the representation of image histogram. The desired histogram PFN is automatically constructed by the fuzzy addition of the tuning PFN and the original one. The tuning PFN is implied from the fuzzy inference rules. And, the mapping function is decided by the relations between t he desired PFN and the original one. The effectual results are demonst rated by the mapping functions which meet the image enhancement requir ements. The performance and effectiveness are shown by the analysis an d the resultant image in comparison with other methods.