DFD
Depth-From-Defocus [Passive] FocusEstimates defocus amount by comparing two images captured at different aperture diameters, using the known relationship between defocus blur size and depth.
Estimates defocus amount by comparing two images captured at different aperture diameters, using the known relationship between defocus blur size and depth. Developed by Panasonic. Faster than pure CDAF but not as predictive as PDAF. Not used in Fuji systems.