PUTRA, T. D.; PURNOMO, R. Research on Sobel Edge Detection Algorithm of Grayscale Images to Analyse Car Number Plate. Sinkron : jurnal dan penelitian teknik informatika, [S. l.], v. 9, n. 2, p. 598-604, 2025. DOI: 10.33395/sinkron.v9i2.14538. Disponível em: https://jurnal.polgan.ac.id/index.php/sinkron/article/view/14538. Acesso em: 11 aug. 2026.