SU934511A1 - Graphic information readout device - Google Patents

Description

(S) DEVICE FOR READING GRAPHIC INFORMATION

one

The invention relates to automation and computing and can be used to read graphic information.

Apparatuses for reading graphic information l and t2 are known.

The first known device contains a scanning unit connected to a video signal converting unit with counters X and through a control trigger with one of the inputs of the first element AND, the other input of which is connected to a pulse generator, and the output connected to a counter of Y coordinates, a memory block, connected to the counter coordinates X and through the second element And to the delay unit, and the blocks match l.

The disadvantages of such a device are low speed and limited functionality.

The closest in technical essence to the present invention is a device for reading graphic information containing a scanning unit connected to a video signal converting unit with an X coordinate counter and through a control trigger with one of the inputs of the first And element, the other input of which is connected to a pulse generator, and the output is connected to the Y coordinate counter, a memory block connected to the X coordinate counter and through the second

10 element And to the delay unit, the trigger trigger connected to the video signal conversion unit, the delay unit and the matching blocks connected to the Y coordinate counter,

15, a comparison unit, connected to the second And element, and coordinate registers, the inputs of which are connected to the coincidence blocks, and the outputs are connected to the memory and comparison blocks 2.

20

The disadvantage of this device is the limited functionality due to the registration in the memory block of the full value

3EZ

the current ordinate of the graph being transformed each time it differs from the value of the previous ordinate. Moreover, such registration is made in those cases when evenly varying parts of the chart are read.

The purpose of the invention is to improve the speed of the device by eliminating the recording of redundant information in the process of converting graphs.

The goal is achieved by the fact that the device containing the scanning unit, connected to the video signal conversion unit, has the first counter and the inputs of the first one. a trigger whose output is connected to one input of the first element I, the other input of which is connected to the pulse generator, and the output is connected to the second counter, elements of the first and second groups, one inputs of which are connected to the second trigger connected to the video signal conversion unit, others the inputs are connected to the second counter, and the outputs are connected to the inputs of the first and second registers, respectively, the second element, whose inputs are connected to the delay element connected to the video signal conversion unit, and to the A comparison is made, and the output is connected to one input of the memory unit, the other input of which is connected to the first counter, and the output is the output of the device, a third trigger is inputted, the input of which is connected to the scanner, elements AND of the third group, whose inputs are connected to the outputs of the first register and the third trigger, and the outputs are connected to the memory unit, and the series connected switch, the inputs of which are connected to the first and second registers, and the outputs are connected to the comparison units and memory, the unit for generating increment signals The second coordinate is connected to the comparison and memory units, and the third trigger, the other input of which is connected to the video signal conversion unit, and the output is connected to the memory unit.

In this case, the unit for generating signals of the coordinate increments contains elements of the fourth group, whose inputs are the inputs of the block, and the outputs are connected to the inputs of the first

14

element OR, and elements of the fifth group, whose inputs are the inputs of the block, and the outputs are connected to the inputs of the second OR element, while the outputs of the first and second OR elements are the outputs of the device.

FIG. 1 shows a block diagram of the device, FIG. 2 shows a constructive implementation of a unit for generating signals of coordinate increments.

The device comprises a scanning unit 1, a video signal conversion unit 2, a first counter 3. a first trigger C, a first element AND 5, a pulse generator 6, a second counter 7, a block 8 of memory, a second element 9, a delay element 10, a second trigger 11, the elements of the first 12 and second 13 groups, the comparison block H, the first register 15, the second register 16, the switch 17, the coordinate increment generation unit 18, the third register 19, the third group AND elements of the third group, the third / trigger 21, the fourth group of 22 elements And 23, nth group of 2A elements And 25, the first 26 and the second 27 lementy OR.

The device works in two modes.

The mode of registration of readings of the schedule.

Before starting the operation, the switch 17 is set to position 1, in which the outputs of the registers 15 and 16 are connected respectively to block k and block 8, the trigger 21 is set to the zero state and the elements And 20 are closed.

During the operation of the device, unit 1 performs sequential, line by line, image tracking. In order to synchronize its operation with the remaining blocks of the device, it produces pulses at the beginning and end of the scan line, which arrive at the trigger. With the arrival of the start pulse of the scan line, trigger 4 opens the first element AND 5 and the counter 7 of the Y coordinate starts counting the pulses from generator 6. In parallel with the work of the counter of the Y coordinate 7, the counter 3 of the X coordinates also receives the pulses of the beginning of the row. This counter generates the X coordinate for each read point in the image. Video signal generated in

five

block 1, enters block 2, where an image pulse is formed, standard in amplitude and duration. With the arrival of this pulse on the trigger 11, the latter through the elements And 12 connects the output of counter 7 to the register 15. When this pulse arrives from the next scan line, the trigger 11 switches to the opposite state and through the elements And 13 connects the output of the counter 7 to. the input of register 16. Block III will perform a one-by-one comparison of the ordinate codes received on the previous and next sweep lines and arriving at its inputs through switch 17 with the output of registers 15 and 16. High resolution potential at the output of unit 1 will be only if the codes are unequal. In this case, the second element And 9 opens, and the read pulse detained by the element

10 delay on the transmission of the ordinate code from counter 7 to register 16,

as well as for the comparison time in block I enters into block 8 for receiving coordinates from register 16 and

counter 3.

The next read cycle of the graphic information ends in that the read pulse through the trigger

11 and element 12 again connects the output of counter 7 to the first register 15. If, in this case, the ordinates of the adjacent read points are again different, then the AND block reopens the element 9 and the delayed read pulse entering the block 8, records the contents of the register 15 in block 8. If, on two adjacent scan lines, the ordinates of reading points are the same, block 14 locks the AND 9 element

and thereby blocks the circuit of the passage of the read pulse to the input of block 8. I

Registration mode increments schedule.

Before the device starts its operation in this mode, the contents of register 15, 16 and 19 are brought to the zero state, switch 17 is set to position 2, at which the outputs of registers 15 and 1b are connected to block 18, trigger 21 is set to one state, at which elements 20 and 20, trigger 11 is set to one

116

the state in which elements AND 12 of the first group are prepared. With the start of operation of the device, unit 1 performs sequential image tracking. In order to synchronize its operation with the remaining blocks of the device, it produces pulses at the beginning and end of the scan line, which arrive at trigger 4. With the arrival of the start pulse of the scan line, trigger k opens the first element And 5, and counter 7 starts counting the pulses from generator 6. Parallel With the operation of the counter 7, the counter of the coordinate X 3 also works, on which the pulses of the beginning of the line are constantly received. This counter generates the X coordinate for each read point in the image.

The video signal generated in block 1 enters block 2, where an image pulse is formed, standard in amplitude and duration. With the arrival of this impulse on trigger 11, the latter, via elements AND 1, connects the output of counter 7 to register 15 and rewrites the readings of counter 7 into it. At the same time, the inputs of block 18 through switch 17 receive the values of the lower bits of registers 15 and 16. So as the contents of register 15 is the current value of the ordinate of the plotted graph, and the contents of register 16 is zero, the output signals of block 18 will be different from zero. The signals from the outputs of the IS block and the register 19 are fed to the inputs of the block. High resolving potential at the output of block 1 will be only when the signals at its input are unequal. Since the contents of register 19 is zero, and the state of block 18 is different from zero, the high resolving potential from the output of block k opens the second element 9 and the read pulse delayed by the delay element 10 for the transfer time of the ordinate code from counter 7 to register 15, and also at the time of comparison in the AND block, enters the block 8 to control the entry in it of the value of the first transformed Y coordinate transmitted from the output of the register 15 through the AND 21 elements opened by the trigger 21, and also the entry of the corresponding X coordinate, passing my counter with three outputs.

79

At the end of the conversion cycle, the pulse terminating the conversion line, coming from the output of block 1 to the input of flip-flop 21, is set to the zero state.

During the next conversion cycle with the appearance of a pulse at the output of block 2, the signals from the output of block 18 are copied to register 19 and trigger 11 connects output of counter 7 to register 16 through elements AND 13 and rewrites the readings of counter 7 to register 16. At the same time, inputs block 18 through switch 17 receives the values of the lower bits of the previous and current ordinates of the transformed graph. The signals from the outputs of block 18 and register 19 are fed to the inputs of block 14. High resolving potential at the output of block k will be only when the signals from the outputs of blocks 18 and 19 are unequal. Such a situation occurs only when the increment sign of the current ordinate is transformable. the graphics change to the opposite. In this case, the high resolution potential from the output of block 1 opens the second logic element AND 9, and the read pulse delayed by the delay element 10 at the time of transmission of the ordinate code from counter 7 to register 16, as well as the comparison time at block 14, enters block 8 to control the reception of the magnitude and sign of the increment of the current ordinate, which are received in block 8 from the output of block 18, as well as the reception of the value of the coordinate from the output of counter 3. The introduction of new blocks and connections significantly reduces the redundancy of information stored in s of the apparatus during the conversion charts.

Claims (2)

Invention Formula 4. A device for connecting graphic information containing a scanning unit i connected to a video signal converting unit with a first counter and inputs of a first trigger, the output of which is connected to one of the inputs of the first element And, the other input of which is connected to a pulse generator, and output G1od II8 It is connected to the second counter, the elements of the first and second groups, one inputs of which are connected to the second trigger connected to the video signal conversion unit, the other inputs connected to the second counter, and the outputs connected to the inputs of the first and second registers, respectively, the second And input, whose inputs connected to a delay element connected to a video signal conversion unit and to a comparison unit, and the output is connected to one input of a memory unit, the other input of which is connected to the first counter, and the output is output Device, characterized in that, in order to increase device speed by eliminating the recording of redundant information, it contains a third trigger, the input of which is connected to the scanning unit, AND elements of the third group, the inputs of which are connected to the output of the first register and the third trigger, and the outputs are connected to a memory unit, and a series-connected switch, the inputs of which are connected to the first and second registers, and the outputs are connected to the comparison and memory units, the unit for generating the coordinate increment signals, connected to the comparison units and the memory, and a third register, the other input of which is connected to the video signal conversion unit, and the output is connected to the memory unit. 2. The device according to claim. 2, characterized in that the block of forming the signals of the increments of coordinates contains elements of the fourth group, whose inputs are the inputs of the block and output (5 (connected to the inputs of the first element OR, and elements of the fifth group) whose inputs are the inputs of the block, and the outputs are connected to the inputs of the second OR element, with the outputs of the first and The second OR elements are device outputs. Sources of information taken into account in the examination 1. USSR author's certificate No. 260294, cl. G About K 11/00, 19b9. 2. Authors certificate of the USSR (f 607243, cl. G About K 11/00, 1978 (prototype). Fig 1 To in 5 С C i J Knowledge R. FIG ..