(ii) Structure Sensor
Structure Sensor is a mass market infrared sensor manufactured by Occipital. Retailing at $300, Structure Sensor is oriented towards several 3D sensing use cases, including interior design (capture of room interior dimensions), health (capture of body dimensions), and 3D model creation for gaming and software enthusiasts (capture of small items, such as models or figurines, at close range). The device is a sensor only, and requires connection to an iPad with a available memory to process the raw signal captured by the sensor. Several SDK apps are available based on existing use cases. After tested several, the Capture package was selected due to its medium range and ease of use.
The sensor with Capture package was first calibrated to ensure alignment between the iPhone camera image and the infrared range data. At our selected site, the Structure Sensor was used to scan curb cuts for which our measurements - including ramp width, lip height and slope - were required.