It is very urgent to build an evaluation criterion in image compression

enhancement

restoration and analysis fields.In this paper

fractal dimension is utilized to be an image quality assessment index and describe image luminance and texture characteristics from non-linear aspects.Lacunarity changes can also describe image quality.Therefore fractal dimension difference and lacunarity difference are integrated into one single mathematics model by linear regression analysis.Experiment results show that against traditional model such as PSNR

SSIM and so on

the proposed approach can not only assess different distortion types

same distortion type with different distortion levers accurately

but also has stronger correlation with MOS

more agreement with the perceptual of human beings

and can assess image quality accurately and effectively.