SU763881A1 - Device for processing textual data - Google Patents

Description

the outputs of the converter. The time interval to the code, the sensor of the end of the line and the element And, the function generator, the first input of which is connected to the second input of the analog-digital converter and connected to the output of the frequency divider, and the second input - to the output of the line start sensor, and the subtraction unit, the first and second inputs of which are connected to the outputs of the analog-to-digital converter and the generator of functions, respectively, and the output is connected to the interface box of a computer.

The drawing shows a structural electrical circuit of the proposed device.

The device contains a block-scan 1, a sensor of sync pulses 2 a sensor of the beginning of a line 3, a sensor of the end of a line 4, an optical signal to electric converter 5, a multiplier b, a driver of the beginning and end of a scale 7, element 8, a time converter in code 9, a frequency divider 10, an analog-to-digital converter (ADC) 11, a function generator 12, a subtraction unit 13, a computer interface unit 14.

The device realizes the comparison of spatial and BpeT / ieHKHx fuy-

. The spatial function is a test image, such as a grayscale, subject to line-by-line scanning, and the time function is the output of the function generator. The device for processing test information allows for the mutual binding of signals from the test image and from the function generator in order to compare them at appropriate points regardless of the scale of the test image, its installation errors in the scanning unit, as well as geometric distortions arising during the production of test images . Then, if the function generator signal is the ideal model of the signal to be obtained by scanning this test image, the resulting actual signal over the entire dynamic range can be ideal for monitoring, tuning and calibration. The value of the difference, entered into the computer, can also serve as values that compensate for distortions in the reproduction of images.

The device works as follows.

A test image with a control halftone scale is set in scan block 1. Restrictive marks, for example, maximum density or color-coded, are present on the test image to select and end the scale. When scanning a test image, the signal at the output of an optical signal to electric converter 5 undergoes processing 5 in a pulse beginning and end shaper 7, which generates a pulse with duration T equal to the time between the detection of the limit start mark and the limit mark of the end of the reference scale. The received pulse arrives at the gate input of the time converter in code 9. The reference frequency of the converter is the pulse sequence at the output of the sync pulse sensor 2, the frequency fq of which is proportional to the instantaneous sweep speed. Thus, at the information outputs of the time converter in code 9, at the end of the gating pulse, the code Ku is set, the value of which is equal to the spatial size of the test image in the cross section of this line in units of measurement equal to the frequency frequency fq.

KM .T

By the impulse of the end of each line coming from the sensor of the end of line 4 to the input of the input of data input of a programmable frequency divider 10, the measurement result is taken by the divider, and the division factor of the divider is always 5 to the received K ... code.

During the existence of pulses 1, at the output of the pulse driver of the beginning and end of the scale 7, the clock input of the frequency divider, 10, pulses of the multiplied frequency from the output of the multiplier arrive at the clock input of the frequency divider.

b, the input of which is connected to the sensor of clock pulses 2. If the multiplication factor is P, then the frequency value at the output of the multiplier

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and the frequency on the t & o divider

I

and

Pulses from the output of frequency divider 10 start up the ADC 11 and sequentially sample the values of the function generated by the function generator 12. The measurement results of the ADC. and the value of the function is subtracted in subtraction unit 13, and the difference is entered into a computer using a computer interface 14. To reset

the transducer 9 and function generator 12 are dropped from the beginning of each line by a pulse from the output of the sensor to the start of line 3.

For any change in duration T, the amount is evenly distributed.

Claims (1)

Claim A device for processing test information, comprising a scanning unit connected to a clock sensor, beginning and end line sensors, an optical signal to electric converter, optically connected to a scanning unit, an analog-to-digital converter, the first input of which is connected to the output of the optical signal to electric converter and a computer interface unit, characterized in that, in order to increase the speed and accuracy of processing, the device comprises a pulse generator of the beginning and end of The input, whose input is connected to the output of the optical signal to electric converter, the multiplier, from the input of which is connected to the output of the clock sensor, the And element, the inputs of which are connected to the outputs of the pulse former and the end of the scale and the multiplier, are transformed. _ a time slot into the code, ' ^{and the} first, second and third inputs of which are connected to the outputs of the pulse shaper of the beginning and end of the scale, the clock sensor and the line start sensor, respectively, 15 a frequency divider whose inputs are connected to the outputs of a time interval to code converter, line end sensor and AND element, a function generator, the first input of which is connected to the second input of an analog-to-digital converter and connected to the output of the frequency divider, and the second input is connected to the output of the beginning of line sensor, and a subtraction unit, the first and second inputs of which are connected to the outputs of the analog-to-digital converter and function generator, respectively, and the output is connected to a computer interface unit.