Abstract: In an arrangement for control of aerial cameras an objective for imaging a surveyed area onto a projection plane is employed. The image frequency and the drift are determined from the speed and the direction of the image motion on the projection plane, whereas the grey values are exploited for the exposure setting of the camera. The obtained parameters are used for controlling the camera. The projection plane is covered at least partially by one or more than one digital photo detector matrix. The signals produced are fed into an information processing stage connected to the photodetector matrix for being processed in accordance with a preselected program. An output unit controls the camera in dependence of the processed signals. The projection plane can be arranged in the image plane of the camera objective and can be employed to evaluate the entire photogram.

Abstract: A method for use in object examination involves the subdivision of a lens field of view into a succession of cells, the encoding of such cell succession and the making of a record of radiant energy reflected into the lens field of view from the object and issuing from the cell succession.

Abstract: Reticle structure defining a succession of contiguous cells, separately discernible upon illumination thereof, is spacedly positioned relative to a discernible indicium, such as a light source. The indicium is disposed in a known location relative to the reticle structure and the cells and indicium are viewed jointly from a given location. Information is derived for use in determining the positional coordinates of the given location with respect to the indicium.