True or False. A rolling shutter captures images line by line.

A rolling shutter indeed captures images line by line. This technology is often used in digital cameras and imaging sensors, where the sensor reads out the information for each line of pixels sequentially from top to bottom (or sometimes bottom to top). As a result, when capturing fast-moving objects, you may see distortions or artifacts in the images because different parts of the scene are captured at slightly different times.

This method contrasts with a global shutter, which captures the entire frame simultaneously. The rolling shutter approach is common in consumer cameras, including those used in drones, due to its simplified design and ability to capture images of varying lighting conditions without causing significant exposure issues across the frame.

Understanding how a rolling shutter operates is important for users of UAS, especially in situations where precision is crucial, such as in aerial photography or surveying, to ensure that the limitations of this technology are taken into account for the desired imagery.