An Improved SROD Blotch Detection Method in Old Film
一种基于改进的SROD算法的电影胶片

Digital film archives are often damaged by aging and multiple playing,such as dust spots,dirt,blotches,film unsteadiness,line scratches,flicker,noises,color variations and blurs,witch may cause some artifacts on the films. This paper introduces a method for blotch detection. The initial detection is gained by using an improved SROD algorithm. And then postprocessing module is achieved through two EM steps,thus eliminating the effect of noise and determining blotch. Experimental results show that the blotch detection method proposed in this paper is effective and can be easily implemented.