What does 3-D imaging use to capture a digital map of an artificial
environment or object?
3-D imaging uses various techniques and devices to capture a digital map of an artificial environment or object. These techniques typically involve the use of cameras or sensors to capture a series of images or measurements, which are then processed to create a 3-D representation.
Some commonly used methods for capturing 3-D images include:
1. Stereoscopic Imaging: This method involves capturing multiple images of the environment or object from different angles using a pair of cameras. The overlapping images are then combined to create a 3-D representation.
2. Time-of-Flight (TOF) Sensors: TOF sensors emit pulses of light or infrared radiation and measure the time it takes for the pulse to travel to the object and back. This data is used to calculate distances and create a 3-D map.
3. LiDAR (Light Detection and Ranging): LiDAR uses lasers to emit pulses of light and measures the time it takes for the light to bounce back from the object or environment. This data is used to create a high-resolution 3-D map.
4. Structured Light Scanning: This method involves projecting a pattern of light onto the object or environment and then capturing the distorted pattern using a camera or sensor. The distortions are analyzed to create a 3-D map.
5. Photogrammetry: Photogrammetry uses a series of 2-D images taken from different angles to create a 3-D model of an object or environment. Software algorithms analyze the images and calculate the spatial information to reconstruct the 3-D model.
These techniques can be used individually or in combination, depending on the requirements of the application and the level of detail needed in the 3-D map.