Figure 2
The horizontal strip of five equally spaced panels, each illustrating one stage of creating labeled image data from real-world maintenance scenes, with thick black arrows between panels indicating a left to right sequence. In Panel 1, captioned “Scene selection,” a brightly colored facility map fills most of the frame, with irregular green, yellow, and pink blocks representing zones and red lines marking routes; in the lower right, a printed table of coordinates or codes sits on top of the map. Panel 2, “Video recording,” shows a screenshot of a media player window: at the center, a worker in a helmet walks away from the camera through a dim pipe corridor; the top bar includes the file name, and playback controls are along the bottom (play button, time bar, volume icon, and full screen toggle). Panel 3, “Key frame extraction,” switches to a desktop file browser window filled with dozens of tiny thumbnail images arranged in a tight grid of rows, each thumbnail showing the corridor worker from slightly different positions; file names in small text run under each thumbnail, and a control bar at the top of the window shows standard icons for view mode, search, and navigation, conveying that the video has been decomposed into many individual candidate frames. Panel 4, “Resize and scaling,” abstracts the process with a pale blue rectangular canvas whose upper left is occupied by a bright green square surrounded by a dotted outline and four corner handles; a dark arrow cursor points inward from the lower right. Panel 5, titled “Label generation,” depicts another desktop window, this time containing six blue folder icons stacked in two columns; each folder label is a truncated version of a full class name, such as “1 Currently operatin ellipsis ase wait,” “2 Need parts slash tools, pl ellipsis er to me,” “3-Hold parts slash tools for me”, “4-Assistance needed, ellipsis support”, “5-Need to move to the n ellipsis se follow”, and “6-No personnel present, ellipsis ersonnel”. The operating system toolbar at the top of this last panel includes standard icons for layout, sort order, and sharing, reinforcing that this stage is simple file organization.Data collection and processing. Source: Authors’ own work