What technique uses digital cameras to photograph building facades for measurement?

Rectified photography is a technique that involves capturing images of building facades with digital cameras in a way that corrects the perspective distortion typically encountered in photography. This method allows for the creation of images that can be reliably used for precise measurements and analysis, making it particularly valuable in architectural documentation and surveying.

In rectified photography, the camera is often positioned perpendicular to the facade, which helps in reducing distortion. The captured images can then be corrected through software to produce accurate representations of the facade that maintain true scale and proportion. This technique is especially useful when producing drawings or plans from photographs, as it provides a reliable basis for both visual reference and measurement.

The other options, while related to photography and measurements in different contexts, do not specifically focus on capturing and correcting facade images for precise measurement in the same manner as rectified photography. For instance, orthophotography involves creating a geometrically accurate aerial image, and stereophotogrammetry typically involves capturing images from different angles to create three-dimensional models, which is not as directly related to facade measurement. Digital rendering refers to the creation of visual representations rather than capturing existing conditions through photography.