On the use of histograms of oriented gradients for tremor detection from sinusoidal and spiral handwritten drawings of people with Parkinson's disease. - João Paulo Folador; Maria Cecilia Souza Santos; Luiza Maire David Luiz; Luciane Aparecida Pascucci Sande de Souza; Marcus Fraga Vieira; Adriano Alves Pereira; Adriano de Oliveira Andrade (Medical Biol. Eng. Comput., 2021)