SU748134A1 - Apparatus for automatic identifying of identical points on stereopair colour prints - Google Patents

Description

The goal is achieved by including in the circuit a device of a continuous color spectral wedge, which is a light filter with a monotonous and constant characteristic of the spectral transmittance, and a dividing device.

The invention is clarified by.-Drawing, where 1, 2 are transmission electron tube (CRT); 3, 4 - optical systems; 5, b - carriages with color photographs of stereo pairs fixed on them; 7, 8 - translucent mirrors 9, 10, 11, 12 - photomultiplier tubes (PMT); 13, 14, 15, 16 - y-filters 17, 18 - light filters with monotonically varying spectral transmittance; 19, 20 - dividing devices; 21 - electronic correlator; 22, 23 - voltage to linear transducers 24, 25 -. CRT sweep control units.

The screens of the front electron beam tubes 1 and 2 are optically coupled to the photoelectric multipliers 9,

10, 11, 12 through optical systems 3, 4, carriages 5 and 6 with stereopairs and translucent mirrors 7 and 8 fixed on them, and on the way of the light beam from the translucent mirrors 7, 8 to the photomultiplier

11, 12, light filters 17, 18 with monotonically varying spectral transmittance are placed. The outputs of photomultipliers 9, 10 11, 12 through amplifiers 13, 14, 15, 1

 connected to the corresponding inputs of the dividing devices 19, 20, the outputs of which are connected to the inputs of the electronic correlator 21, to the other inputs of which are connected the outputs of the amplifiers 13, 14. The output terminals of the electronic correlator 21 are connected to voltage converters 22 and 23 which are mechanically connected with the carriages 5 and 6 and the CRT scanner control units 24, 2.5, the outputs of which are connected to the control inputs of the transmitting electron-beam tubes 1 and 2,

The device works as follows.

Drilling points with sKpaFiOB transmitting cathode-ray tubes 1 and 2 are projected by optical systems 3 and 4 onto the plane of the arrangement of the J color of the stereopair color images installed on the carriages and 6.

The drawing shows the case when the pictures are made on a transparent basis. For processing color images taken on an opaque basis, the device provides a rotating system for reading optical information in reflected light. After passing (reflecting) light rays through stereo pairs

they fall on the translucent mirrors 7 and 8, in which each of the light fluxes F and F2 is divided into two streams: F, F and F, and f. The light fluxes F and F are transmitted to photomultipliers 9 and 10, in which they are converted into electrical signals. The output signals of photomultipliers 9 and 10 are amplified in amplifiers 13 and 14. The light fluxes F and F are transmitted to light filters 17 and 18 with monotonically varying spectral transmittance, whose transmittance depends on the wavelength of the incident light on them, for example, according to a linear law .

Light streams that pass through the filters are converted into electrical signals by photomultipliers 11 and 12 (with parameters similar to those of photomultipliers 9 and 10), which are fed to the inputs of amplifiers 15 and 16. The electrical signals from the outputs of amplifiers 13, 15 and 14, 16, respectively, arrive dividing devices 19 and 20, the output signals of which depend only on the spectral characteristics of the read points of color photographic images and do not depend on the images of the optical densities of these points.

The outputs of the amplifiers 13 and 14 and of the dividing devices 19 and 20 enter the electronic correlator 21. It carries out a mutual correlation between the signals from the amplifiers 13 and 14, carrying information about the optical density of points, and the mutual correlation between the signals received from divider devices 19 and 20 that carry information about the spectral characteristics of similar points of the stereo pair images. The results of the correlation of both types of optical information are summed, and on their basis, control signals are output at the output of the correlator 21 to the voltage transducers 22 and 23 directly connected to the carriages 5 and 6 and to the scan control units 24 and 25, by means of which the automatic adjustment of the scanning speed and the size of the CRT raster is carried out.

Claims (2)

Invention Formula A device for automatically identifying identical points on color stereo pairs containing. two transmitting photovoltaic nodes, each of which consists of successively scattered optical rays of a scanning node, an optical system, a carriage with a color photograph fixed on it stereo pair, translucent mirror and two photomultipliers with amplifiers, an electronic correlator, two voltage-to-linear voltage transducers, and two scanning control units, different. In order to simplify the design of the device, each transmission of a photovoltaic assembly is provided with a continuous color spectral wedge, made in the form of, for example, a light filter with a monotonically specified spectral transmittance characteristic, located in the light beam, between a semitransparent mirror and one of the photomultipliers, and the outputs of the amplifiers of each transmitting photoelectric assembly are connected to the inputs of separating devices, the outputs of which are connected to the inputs of the electronic correlator. Sources of information / taken into account in the examination of Q 1. USSR author's certificate 368481, cl. G 01 C 11/26, 1969, 2. USSR author's certificate 380952, cl. G 01 C 11/18, 1971.