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提出能同时消除亮度和反差分布不均匀现象的分块均值方差变换法,重点对插值匀光法、MASK匀光法、同态滤波匀光法、Retinex匀光法以及分块均值方差变换法的校正效果进行了实验比较。研究表明:分块均值方差变换法既能消除亮度分布不均匀现象,又能消除反差分布不均匀现象,而MASK匀光法、插值匀光法、Retinex匀光法只能解决亮度分布不均匀问题,同态滤波匀光法仅能减弱亮度分布不均匀现象;在匀光效果方面,分块均值方差变换法最好,MASK匀光法次之,插值匀光法紧随其后,接下来是Retinex匀光法,同态滤波匀光法最差。 更多还原

【Abstract】 After the brief introduction of existing dodging methods,the piecewise mean-variance adjustment is presented for both brightness and contrast homogenization.Then,the focus of the paper is put on the experimental comparison among the results obtained by the following five algorithms:MASK dodging,interpolation dodging,homomorphic filtering dodging, retinex dodging,and piecewise mean-variance adjustment.The experiments indicate that the piecewise mean-variance adjustment can deal with non-uniform b... 更多还原