SU1288937A1 - Device for displaying objects - Google Patents

Abstract

The invention allows the formation of an image of any part of the observed object. The invention is an extension of the functionality of the device by highlighting a fragment of the image and displaying it in the center of the screen of the video monitoring unit. The device contains a video monitoring unit (WKB) 1, a mixer 2, a transmitting television camera 3 consisting of a frequency reference 4, a synchronous generator 5, staffing 6, and a lowercase 7 sweep, block 8 of the transmitting television tube and video amplifier 9, block 13 of the cursor position control, trigger N 15, counters 17 and 18, G-19 and 20 rectangular pulses. The newly introduced Mr. 12 strobe pulses, an electronic key 10, a video monitoring unit 11 and a block 16 of the automatic delay of clock pulses. 1 il. S (L to 00 00 from 00

Description

, -l: o6poieiJne refers to the technical deformities of displaying objects on the CRT screens and allows you to form an image of any part (detail, fragment) of the observed object.

A person (an observer, a researcher), examining the image of the whole object, selects the detail of interest by a contour of any shape and size, while the recovered part is automatically placed in

the monitor (a, in principle, in any other place.) of the screen regardless of the initial position in the image of the object.

The aim of the invention is to enhance the functionality of the device by highlighting a fragment of the image and displaying it in the center of the screen of the video monitoring unit.

The drawing shows a structural electrical circuit of the device for displaying objects.

The proposed device (Fig. 1) contains the first video monitoring unit (WKB) 1, the video input of which is connected to the mixer 2 and the transmitting television camera (PTC) 3, which contains the generator 4 of the reference frequency, the clock generator 5, the frame generator 6 and the horizontal 7 sweeps, block 8 of the transmitting television tube and video amplifier 9. The generator 4 of the reference frequency is connected to a synchronous generator 5, the personnel and line pulses of which are associated with the corresponding synchronization inputs of the first video caption unit 1 and generators 6 and 7 except current. The output of damping pulses of the synchronous generator 5 and the outputs of the generators 6 and 7 sweeps are connected to block 8 of the transmitting television tube, whose ROCKWAY through video amplifier 9 is connected to the first input of mixer 2. The second video control block 11 is also connected to video amplifier 9 The control input of the electronic key 10 is connected to a strobe pulse generator 12. The output of the cursor position control unit 13 is connected to the second input of the mixer 2. The inputs of block 13 are connected to the outputs of the frame and line sync pulses of the clock generator 5. The output of block 13 is also connected to two triggers 14 and 15 that are part of block 16 of the automatic delay of the clock pulses. Block 16 contains two identical in structure channel formation frame and horizontal sync pulses for synchronization of the second video control unit 11. Each channel contains a series-connected trigger 14 (15), a counter 17 (18), and a generator 19 (20) of rectangular pulses. The counting input of the counter 17 is connected to the generator 4 of the reference frequency, and its output is connected to the generator of 19 rectangular pulses and the second input of the trigger 14 The counting input of the counter 18 is connected

five

0

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0 5 about 5 45 50 5S

To the output of horizontal sync pulses of synchro generator 5, and its output is connected to a generator of 20 rectangular pulses and a second input of a trigger 15. The outputs of generators 19 and 20 of rectangular pulses are connected to the synchronization inputs of the second video monitor unit (VKB) 11 and the generator 12 of strobe pulses .

A device for displaying objects operates as follows.

The reference frequency generator 4 PTC 3 generates reference frequency pulses that determine the accuracy of the timing of the sweep system and the synchronization of all discrete nodes of the device. These pulses synchronize the synchro-generator 5, which forms frame and line sync pulses, which start generators 6 and 7 sweeps, the first WKB 1, and also the block 13 of the cursor position control.

Block 13 generates a pulse signal of a cursor the size of an oder element, the delay of which relative to personnel and horizontal sync pulses is set to 1c using a manual input device (keyboard, electromechanical transducer, light pen, etc.). The cursor signal is fed to the mixer 2, so on the screen of the first VCB 1 you can visually observe its position on the original image. (Using a manual input device, the cursor can be moved along the screen plane and combined with any point of the original image. At the same time, the cursor signal (CK) enters the automatic delay block 16 of the clock.

Block 16 contains two identical sync pulse shaping schemes. The IC from block 13 arrives simultaneously on two triggers 14 and 15. Trigger 14 opens counter 17, to the counting 51Y input of which pulses come from generator 4 of the reference frequency. If the reference frequency generator 4 in time Tc (line scan period or the duration of one decomposition line) generates Nc pulses, then the capacity of the counter 17 is defined as Nc / 2. At the moment of overflow of the counter 17 (once for the time Tc in the middle of this time interval) an output pulse is formed, covering the trigger 14 and the trigger generator 19 of the rectangular pulses, which forms the horizontal sync pulses for. launching the sweeps of the second WKB 11, 5) Tii horizontal sync pulses are delayed relative to the cursor signals by Tc / 2, and relative to the horizontal sync pulses of the synchro-generator 5 — by tons T − i-Tu / 2 f.

The second shaping scheme works in a similar way, which generates frame sync pulses for; -; a ;; vcKa sweeps of the second WKB 11. Signal. From Kvpcopa (SC) from block 13 are sent to the trigger 15. which kills the counter 18. On 1, –hst; - SHOW input

the counter 18 receives the horizontal sync pulses from the clock generator 5. If Nk horizontal sync pulses are formed during Tk time (the duration of one decomposition frame or the frame sync pulse period), the capacitance of the counter 18 is defined as NK / 2. At the moment of overflow of counter 18 (once during Tk time, in the middle of this time interval), an output pulse is formed, closing trigger 15 and triggering generator of 20 square-wave pulses, which generates frame sync pulses to trigger sweeps in the second KB 11.

The overflow pulses of the counters 17 and 18 are fed to the strobe pulse generator 12, which forms the television window signal. Since the position of the center of the screen on the second WBC is uniquely related to the position of the cursor on the screen of the first WKB 1, the window signals can be generated independently of the cursor position control. To synchronize the strobe pulse generator 12, it is sufficient to use only sync pulses (or pulses equivalent to them from the output of counters 17 and 18) to start the sweeps of the second VKB 11.

The pulses from the strobe pulse generator 12 are controlled by an electronic key 10, the input of which receives video signals from the video amplifier 9 PTC 3. The key 10 is opened by a window signal and a part of the video signal passes to the video input VKB 11. On the screen of the VKB 11 in the central part you can see an image of the selected fragment whose boundary is defined by the signals of the television window.

Claims (1)

Invention Formula A device for displaying objects consisting of a first video monitor unit, the video input of which is connected to the mixer outputs and a transmitting television camera containing a reference frequency generator, a synchronous generator, vertical and horizontal sweep generators, a transmitting television tube unit and a video amplifier, the output of the reference generator 0 Frequency connected by SI :, -pore tor, staffing and boy outs; .nc pulses of which are connected by co (i.. wha, but with the synchronization inputs of the first;) lurioo- control unit and generators:,; 0 (i is the current, and the output of the damping pulses of the ii xpo generator and the generator outputs. Iep are connected to the ncPiU My, the second and third inputs of the transmitting television tube unit, the output of which through the video amplifier is connected to the first that, in order to extend the functionality of the device by selecting a fragment of the image and its display, or in the center of the screen of the video monitoring unit, a strobe pulse generator, an electronic key, a second video monitoring unit whose video input is connected It is connected to the output of the video amplifier via an electronic key, the control input of which is connected to the output of the strobe pulse generator, the cursor position control unit, the first and second inputs of which are connected to the clock and horizontal sync pulses, respectively, and the output is connected to the second input of the mixed clock, and an automatic delay block for sync pulses, containing two channels, each of which includes series-connected trigger, a counter and a generator of rectangular pulses, with the first input trigger EPA each channel is connected to the output of the cursor position control unit, each channel of the second flip-flop input is connected to the output of the counter corresponding to this channel, the count input of a first channel counter, connected to J output of the reference frequency generator, the counting input of the counter of the second channel — with the output of the horizontal sync pulses of the synchronous generator; the output of the generator of rectangular pulses of the first channel is connected to the horizontal synchronization input of the second 0 of the video monitoring unit and the first input of the strobe pulse generator, the output of the square pulse generator of the second channel is connected to the frame synchronization input of the second video monitoring unit and to the second input of the strobe pulse generator5 owls