Enhanced-MMSE inverse halftoning using table-lookup vector quantization. - Pao-Chi Chang; Tien-Hsu Lee; Che-Sheng Yu (VCIP, 2000)

Hybrid LMS-MMSE inverse halftoning technique. - Pao-Chi Chang; Che-Sheng Yu; Tien-Hsu Lee (IEEE Trans. Image Process., 2001)