Title :
Automatic histogram specification based on fuzzy set operations for image enhancement
Author :
Chen, Bor-Tow ; Chen, Yung-Sheng ; Hsu, Wen-Hsing
Author_Institution :
Inst. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
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. 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.<>
Keywords :
fuzzy set theory; image enhancement; image representation; inference mechanisms; automatic histogram specification; fuzzy addition; fuzzy inference rules; fuzzy set operations; image enhancement; image histogram representation; mapping functions; parameterized fuzzy number; performance; tuning PFN; Frequency; Fuzzy set theory; Fuzzy sets; Histograms; Humans; Image analysis; Image enhancement; Lighting; Performance analysis; Student members;
Journal_Title :
Signal Processing Letters, IEEE
