Restoring Out-of-Focus JPEG Image Based on Stochastic Image Model
Koji Kadono, Kazuhiro A. Fujita, Nobuyuki Nakamori · The Journal of The Institute of Image Information and Television Engineers · 2010
The out-of-focus blurred JPEG images are degraded by being out-of-focus as well as blocking artifacts and mosquito noise caused by quantization on block DCT domain. The purpose of this paper is to sharpen out-of-focus JPEG images without enhancing the blocking artifacts and the mosquito noise. This proposed method is based on the edge-adaptive restoration method: the regularizing operator depends on the edge orientation, and the regularizing parameter depends on the local activity. The variance of the quantization on block DCT domain is taken into consideration.