“…Examples include systems to support spatial awareness and navigation [12,13,21,22,26,62], to aid the identification of specific objects or their characteristics [5,14,15], to assist the detection and identification of text [17], barcodes [31], signs [18,51], or currency [32], and help with handwriting [43]. For digital user interfaces, we further find many applications for the input and recognition of Braille on touchscreens [3,27,34,52], and alternatives for text-entry or navigating digital menus [7,38,24,25,63].…”