APPLICATION oF Robust DATA SCALE ESTIMATES for
improving THE accuracy of the noise variance evaluation on images
V.V. Abramova,
S.K. Abramov
A method for blind evaluation of additive noise
variance based on mode evaluation of distribution of the local variance estimates
obtained on the image homogeneous regions, is
considered. The possibility of accuracy improvement by means of robust local
variance estimates applying is studied. The comparative analysis of several robust
estimates is carried out, their distributions’ features are analyzed, the modifications of the methods for the mode position determining
are proposed. The results of numerical simulations for different test images
confirming the efficiency of the proposed blind variance evaluation method are presented.
Key words: additive noise, blind variance evaluation, mode
evaluation, robust methods.