SU705482A1 - Device for reading out graphical information - Google Patents

Description

. I;;;, The invention relates to automation and industrial technology, in particular to devices for reading graphic information, and can be used for automatically reading graphic information from topographic maps. A device for reading graphic information containing an optical scanning unit is known. transmitted through an optical system with a storage medium, a video signal generating unit connected to a scanning unit and a signal converting unit, a control unit connected to the unit They are connected to the transducer unit 1. The disadvantage of this is structural complexity. Another device is known that contains an optomechanical diverting unit optically connected with a video signal generating unit and connected to reversible counters, an analog-digital converter connected to a video signal generating unit and one input of registers, the other input of which is connected to a memory unit, and the outputs of the registers are connected to the video control, interface and memory blocks, and the control unit 2. Such a device is closest to the proposed technical solution. The disadvantage of it is low accuracy. The purpose of the invention is to demonstrate the accuracy of the device. The goal is achieved by the fact that in it the inputs of the control unit are connected to reversible counters, and with the interface unit connected to the video control unit, and the input unit of the control unit is connected to the memory unit. The drawing shows a block diagram of the proposed device.

The device contains an optics-mechanical scanning unit 1, a video signal shaping unit 2, an acaloglo-digital converter 3 for generating image color features, registers 4, a memory unit 5 reversible counters 6, a control unit | 7, a video control unit 8, and a matching unit 9 for information.

The principle of operation of the proposed device is as follows. The opto-mechanical scanning unit 1, as a drive of which stepper motors are used, is installed at the starting point of the map. The readout of the reversing counters 6 is reset to the zero state. Then, by tracking the lines or scanning the carrier field, the graphic information is read.

The reflected Svietbway stream from the information carrier through the optical-mechanical scanning unit 1 enters the video signal generating unit 2, where the light fluxes are separated according to color features and are converted into electrical signals. Further, the signals from the output of block 2 are fed to the analog-to-digital converter 3, where the formation of digital signs of the chromaticity of information takes place. Digital signs of chromaticity are fed to the input register of registers 4 for writing them to the current addresses of memory block 5.

Unipolar signals from control channels of stepper motors along the axes of block 1 are fed to reversible counters 6, where memory addresses are formed. The values of the memory addresses are written to the control unit 7, with which the addresses of the block 5 are managed. address changes, the input register register 4 information is recorded into the current address of block 5. Thus, regardless of the nature of movement of block 1, memory 5 will generate a digital display of readable graphic information, where the color of the image will be expressed by digital signs, and the coordinates of the elementary areas being registered the read image is the addresses of the memory block 5.

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Reading information from block 5 for further processing or control is carried out using block 9.

The signal from block 9 in the control block 7 generates a memory address and a read signal, through which information of the current address enters the input register of registers 4, and then into the block to register information on, media or for its further mathematical processing using a computer .

In the control mode of the read information, the operation of block 9 is controlled by the video control block 8. The read information in this case from block 5 through the output register of registers 4 enters the display circuit of the video control block 8. To correct the received information, it is sufficient to re-read the section of the carrier to be corrected.

The introduction of new constructive links has significantly improved the accuracy of the device.

Claims (2)

1. US patent No. 3900881, CL. 178-68, published. 1975. 2. Japanese Patent No. 50-32007, cl. 97 (7) In 41, published. 1975. (prototype).