Partial differential equations in image analysis: continuous modeling, discrete processing. - Petros Maragos; Muhammad Akmal Butt (ICIP (3), 1996)

Comparison of Multiscale Morphology Approaches: PDE Implemented Via Curve Evolution Versus Chamfer Distance Transform. - Muhammad Akmal Butt; Petros Maragos (ISMM, 1996)

Two frontiers in morphological image analysis: differential evolution models and hybrid morphological/linear neural networks. - Petros Maragos; Muhammad Akmal Butt; Lúcio F. C. Pessoa (SIBGRAPI, 1998)

Optimum design of chamfer distance transforms. - Muhammad Akmal Butt; Petros Maragos (IEEE Trans. Image Process., 1998)

Curve Evolution, Differential Morphology, and Distance Transforms Applied to Multiscale and Eikonal Problems. - Petros Maragos; Muhammad Akmal Butt (Fundam. Informaticae, 2000)