An enhancement method for low contrast image based on fractal
Min‐Jie Zhang · Journal of Zhejiang University of Technology · 2006
In general,an image collected from industrial field is a kind of low contrast and noisy image.According to the theory of nonlinear fractional Brownian random field model,a new enhancement method is proposed in this paper,in which the image is transformed from gray space into fractal parameter space after the image is filtered through nonlinear filter.The normalized fractal dimension of each pixel in the image acting as weight will enhance the image.In contrast with the gray enhancement of histogram equalization,fractal enhancement method has the advantages in standing out the edges of gray target with no distinct difference and strong power in anti-noise.It would be a good prepare for the image to be recognized in future.