VALLE, Raoni. A "negative" view - the post-processing enhancement of rock art digital image using Inversion Tool and Brightness/Contrast Levels – The case of petroglyphs at the lower Negro river basin, Brazilian Amazonia. Boletín APAR, [S. l.], v. 6, n. 21, p. pp. 927–936, 2014. DOI: 10.70748/ba.21.2014.275. Disponível em: https://revistas.coarpe.org.pe/index.php/BoletinApar/article/view/275. Acesso em: 27 oct. 2025.