SU905832A1 - Device for processing image - Google Patents

Description

(5) DEVICE FOR IMAGE PROCESSING

The invention relates to automation and computing technology and can be used to construct systems for analyzing objects from their holographic image. Image processing devices are known, the action of which is based on photoelectric reading of the analyzed information and converting it to input PZ electronic computer. The closest in technical essence to the proposed device is an image processing device comprising serially connected reading unit, conversion unit and interface unit, as well as a scanner unit and a focusing unit connected to the control inputs of the reading unit, and a synchronizer connected to the control unit. to the inputs of the C2 J conversion and conjugation units. The disadvantage of such a device is the low accuracy of image processing under conditions of increased graininess of the field, for example, when processing images restored by holographic recording. The aim of the invention is to improve the accuracy of image processing. To achieve this goal, a serially connected clock pulse generator and a defocus unit, the output of which is connected to the input of the focusing unit, a comparator unit, the first input of which is connected to the output of the readout unit, the second input of the comparison unit is connected to the output of the clock pulse generator, and to the input of the interface unit, a photodetector connected to the third input of the comparison unit, and a beam splitter, optically coupled to the inputs of the reading unit and the photoreceiver.

The drawing shows a diagram of the device for image processing.

The device contains a reading unit 1, a conversion unit 2, an interface unit 3, a synchronizer A, a scanner unit S, a focusing unit 6, a clock generator 7, a defocusing unit O, a comparison unit 9, a photodetector 10 and a beam splitter 11.

The device works as follows.

The analyzed image is projected on the photo layer of the read unit 1. Part of the light flux is directed by the beam splitter 11 to the photodetector 10. The signals from the output of the scanner 5 entering the read unit 1 perform line-by-line scanning of the image frame. Simultaneously with the sweep along the row, the defocusing block O through the focusing block 6 alternately focuses and defocuses the reading beam. The clock of such an operating mode is set by the clock pulse generator 7.

At the moment of defocusing of the beam in the comparison unit 9, the signal of the readout unit 1 is equal to the signal of the photodetector 10. If the difference in the levels of these signals exceeds the threshold value specified in the comparison unit 9, then the output of the comparison unit 9 produces a pulse arriving in 3. This signal is a resolution signal for recording the code of the number coming from the conversion unit 2 to the interface unit 3 at the time following the defocusing of the beam into the electronic computer. Synchronous operation of conversion unit 2 and interface unit 3 is provided by synchronizer 4, and synchronization of the beam defocusing and comparison of signals s of comparison unit 9 with a clock pulse generator 7. If the difference in signals does not exceed the threshold, the signal at the output of comparison unit 9 is absent and the subsequent The code of the number is not recorded in the computer.

The use of the proposed device allows the computer to enter and process only informative image areas into the computer and thereby significantly shorten the processing time of the entire image.

Claims (2)

1. Mamontov G.M. and others. Optical information input system, Materials of the conference Automation of scientific research based on the use of computers, Novosibirsk, publishing house of the Institute of Automation and Electrometry SB RAS, 197. 2. Polonik B.C. Television automatic devices. And,, Svyaz 197, pp.166-171 (prototype). it  F ua