 The names for these distortions come from familiar objects which are visually similar.Radial distortion, whilst primarily dominated by low order radial components, can be corrected using Brown's distortion model, also known as the Brown–Conrady model based on earlier work by Conrady.The Brown–Conrady model corrects both for radial distortion and for tangential distortion caused by physical elements in a lens not being perfectly aligned.