Hotaka Takizawa, Genki Sekita, Makoto Kobayashi, Akihisa Ohya, Mayumi Aoyagi. Smartphone-Based Recognition Aid of Upward Staircases with People for the Visually Impaired. In Constantine Stephanidis, Margherita Antona, Stavroula Ntoa, editors, HCI International 2021 - Posters - 23rd HCI International Conference, HCII 2021, Virtual Event, July 24-29, 2021, Proceedings, Part II. Volume 1420 of Communications in Computer and Information Science, pages 561-566, Springer, 2021. [doi]