SU1667119A2 - Graphic data input device - Google Patents

Abstract

The invention relates to computing and can be used in input systems and digital image processing. The purpose of the invention is to expand the functionality of the device by determining the coordinates of the image point. A positive effect is achieved by introducing a point source of light (light pointer), a light filter and a block of coding the coordinates of points. 1 hp ff, 2 ill.

Description

The invention relates to computing, can be used in input systems and digital image processing, and is additional to the author. St. No. 556467.

The purpose of the invention is to expand the functionality of the device by determining the coordinates of the image points.

FIG. 1 shows a block diagram of the device; in fig. 2 - functional block diagram of coding coordinates of points.

The device for reading graphic information contains a television sensor 1, an analog-to-digital converter 2, an element 3, blocks 4 and 5 of a horizontal and frame scan, first and second counters 6 and 7 of pulses, a generator of 8 clock pulses, block 9 of comparison, counters 10 and 11 lines and frames, first and second decoders 12 and 13, a computing unit 14, a block 15 for encoding the coordinates of points, a light filter 16, a point source 17 of light.

Block 15 coding coordinates of points (Fig. 2) contains the pulse shaper 18, the first 19 and second 20 triggers, the first and second registers 21 and 22.

The device works as follows.

In the coordinate determination mode, the luminous flux from a point source 17, made in the form of a light pointer, is directed through a light filter 16 into a raster scan field of a television sensor (transmitting television tube) 1. A light filter 16 having a spectral characteristic is paired with a point spectrum source 17, eliminates the influence of extraneous light sources.

The pulsed electrical signal generated at the time of scanning by the aperture scan of the light spot from the point source 17 of the light is output from the output of the sensor 1 to the first control input of the coordinate coding unit 15, the first and second information inputs of which receive the current (X.Y) coordinates

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Astro scan from the outputs of the counters 6 7.

Thus, the information recorded in the coordinate coding unit corresponds to the X-Y coordinates of a point source of light in the field of the raster scan of the transmitting television tube. The transfer pulse from the output of the counter 7 enters the second control input of the block 15 determines the cyclicality of operation of this block, which is equal to one frame of the raster scan. Clock pulses from the output of the generator 8 are fed to the synchronization input of the unit 15 to synchronize its operation.

Information about the X-Y coordinates of a point source of light in the raster scan field by signals from the computing unit 14 to the third control input of the coordinate encoding unit 15 is output from the block 15 to the input of the computing unit.

The coordinate encoding unit 15 (FIG. 2) operates as follows.

The transfer pulse of the second pulse counter 7 is fed to the setup input of the trigger 20 and sets it to state 1, thereby preparing the unit for operation during the forward stroke of the frame sweep of the television sensor 1.

A pulsed electrical signal is fed from the first control input of the coordinate coding unit through the shaper 18 to the information input of the trigger 19 and is written into it on the front of the pulse of the clock signal acting on the synchronizing input of the coordinate determining unit. The output of the trigger 19 appears 1. On the front of this signal, the digital X-coordinate code, acting on the first information input of the coordinate coding unit, is written into register 21, and the digital Y-coordinate code, acting on the second information input of the coordinate coding block nat-register 22. At the end of the pulse of a signal from a point light source, at the output of flip-flop 19, O appears, which is recorded in flip-flop 20. From the flip-flop 20 output, this signal, applied to the flip-flop setup input 19, blocks its operation until the end the forward stroke of the frame scan sensor 1.

Thus, during the time of the forward course of the frame sweep, one-time recording (by first appearance) of information about the coordinates into the registers of the coding block of the coordinates of points occurs. This method of recording was chosen because the actual light spot from a point source of light is quite large and can be placed on several lines of a raster of a transmitting television tube,

Register Read Allow Signals

21 and 22, coming from the third control input of the coordinate coding block, ensure the transfer of information on the X coordinate and Y coordinate to the computational

block 14.

The expansion of the functionality of the proposed device is due to the possibility of its use for reading the trafic information in interactive image processing systems without the use of any additional specialized coordinate input devices.

20

Claims (2)

1. A device for reading graphic information on cars No. 556467. characterized in that, in order to expand the functionality of the device by determining the coordinates of the image points, a point light source, a light filter and a coding unit of the coordinates of points, a point a light source, a light filter and a television sensor are sequentially optically connected, the first and second information inputs of the point coding unit are connected respectively to the outputs of the first and second pulse counters, its clock input is connected to the output of the clock generator, the first, second and third control inputs of the block the coding of the coordinates of points is connected respectively to the output of the television sensor, the transfer output of the second pulse counter and the output of the computing unit, the information The th output of the coding block of points is connected to input computing unit. 2. The device according to claim 1, characterized in that the coding unit of the coordinates of points contains a pulse shaper, the first and second triggers, the first and second the registers, information and installation inputs of the first trigger are connected respectively to the output of the pulse shaper, whose input is the first control input of the control unit, and to the output of the second flip-flop, the setup input of which is the second control input of the block, the output of the first flip-flop, the sync input of which is the sync input of the block, is connected to the information input of the second flip-flop and the sync inputs of the first and second registers, the information inputs of which are respectively, the first and second information inputs of the block, the read enable inputs of the first and second registers are connected to the third control input of the block, and their outputs form the information th output block. fut.f