Digital autofocusing of multiple objects based on image restoration. - Chungnam Cho; SangKyu Kang; Joonshik Yoon; Joon Ki Paik (VCIP, 2000)

Out-of-focus blur estimation using isotropic step responses and its application to image restoration. - Joonshik Yoon; Chungnam Cho; Inkyung Hwang; Joon Ki Paik (VCIP, 2000)