bildverarbeitungsverfahren and device for producing a zielbildes from a quellenbild with change in perspective

摘要

Digital image processing process for constructing a calculated image, termed the target image (I*), which represents a source image (I) reconstructed together with modifications to the angles of elevation and azimuth, and to the scale factor in relation to this source image, comprising the determination of a common vanishing point (P) for the source image (I) and the target image (I*), and of an orthonormal reference frame; the defining of an image (H*) termed the projection of the target image (I*), with geometrical centre ( OMEGA H*) aligned with the optical axis (PZ*) of the target image, with zero angle of elevation, with the same angle of azimuth ( theta *) and with the same framing (2Vx*, 2Vy*) as the target image (I*) so that each pixel (M*) with address (X*, Y*) in the target image (I*) has a counterpart under projection (MH*) with the same address (X*, Y*) in the projection image (H*); the calculation by a trigonometric function (G-1), for each pixel (M*) with address (X*, Y*) in the target image, of the spherical coordinates ( alpha , ss) defining, in the reference frame, the radius joining the origin (P) to the corresponding pixel (MH*) of (H*). Application: surveillance systems. IMAGE