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

In this letter, an automatic histogram specification method is proposed for image enhancement. Parameterized Fuzzy Number (PFN) is adopted for 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 the desired PFN and the original one. The effectual results are demonstrated by the mapping functions which meet the image enhancement requirements. The performance and effectiveness are shown by the analysis and the resultant image in comparison with other methods.