RU2066928C1 - Device for input and output of pictures - Google Patents

Abstract

FIELD: comparative study of objects for criminology and fault detection in industry. SUBSTANCE: device has TV detector 1, synchronization control unit 3, memory unit 5, video control unit 7. TV detector 2, video signal mixer 4 and scaling unit 6 are introduced to accomplish the goal of invention. Device provides possibility to detect matching features and differences in two images by means of their coincidence, scaling and fragment viewing. EFFECT: increased functional capabilities. 8 dwg

Description

 The invention relates to television and can be used in comparative studies of images.

 A device is known that contains a television (TV) sensor, an analog-to-digital converter (ADC), random access memory (RAM), an address block, a digital-to-analog converter (DAC) and a video monitoring device (VKU) (Microprocessor-based devices and systems, 1987, No. 2, pg. 68-69). This device provides storage of images and their output to the VKU screen, but cannot carry out comparative studies of two images.

 A device is known that contains a television sensor, ADC, multiplexer, RAM, DAC and VKU (USSR copyright certificate N 1829045, class G 06 K 9/00, publ. 23.07.93). The disadvantage of this device is the impossibility of comparative studies of two images by combining them and identifying differences.

 The closest in technical essence to the claimed is a device containing a first television sensor, the sync output of which is connected to the input of the synchronization control unit, a memory unit and a video control unit (USSR author's certificate N 1797135, class G 06 K 9/36, publ. 23.02.93 ) The disadvantage of this device is the impossibility of comparative studies of the two images.

 The objective of the invention is to provide a device for detecting differences in two images due to their combination, subsequent scaling and viewing the selected fragment of the enlarged image.

 To solve this problem, a second television sensor, a video signal mixer, and a scaling unit, the input of which is connected to the sync input of the first television sensor, the synchronization control unit output is connected to the sync input of the second television sensor, the video outputs of the first and second television sensors are connected to the first and second inputs video signal mixer, the output of which and the output of the scaling unit are connected respectively to the information and control inputs of the unit and memory, the output of which is connected to the input of the video control unit.

 Figure 1 shows the structural diagram of a device for input-output images. In FIG. 2 shows the design of the synchronization control unit. Figure 3 is a structural diagram of a memory unit. Figure 4-7 shows examples of the execution of the nodes of the memory block. On Fig given the construction of the scaling unit.

 The device for input-output images contains the first and second television sensors 1 and 2, a synchronization control unit 3, a video mixer 4, a memory unit 5, a scaling unit 6, and a video monitoring unit 7.

 The device operates as follows.

 The video signals generated by the synchronously operating television sensors 1 and 2 are sent to block 44. The television sensor 1 also generates clock signals: frame (CSI) and lowercase (SSI) clock and sampling pulses along the line, which synchronizes the operation of the entire device. The synchronous operation of the television sensor 2 is achieved by supplying synchronization signals from the clock output of the television sensor 1 to the synchro input of the television sensor 2 through the synchronization control unit 3.

 The mixer 4 video signals in the simplest case, performs the functions of the adder of two analog signals. Depending on the design of block 4, a sum (difference) signal or a signal corresponding to 1/2 of the first image combined with 1/2 of the second image can be generated at its output.

 The output signal of block 4 is stored in the memory block 5 and fed to the video control unit 7. In the read-modify-write mode, the image signal passes through the video control unit 7. Through the transition to reading mode, the image is frozen in the memory block 5.

 The differences in the two images are detected visually on the screen of the video control unit 7. In this case, by means of the unit 3, the image generated by the sensor 2 is shifted relative to the image formed by the sensor 1. Due to the shift, it is possible to combine images. The combined image signal from the output of the mixer 4 is stored in the memory unit 5. For a more accurate identification of differences in images, a scaling unit 6 is used, which provides a change in the scale (increase) of the combined image recorded in the memory unit 5.

 A fragment of an enlarged image is reproduced on the screen of the video control unit 7 by controlling the address counters in the memory unit 5. Moreover, within the enlarged image, the possibility of smooth fragment-by-window viewing by a window corresponding to the screen size of the video control unit 7 is achieved.

 Consider the operation of the device for input-output images and its components in more detail.

 The block diagram of the synchronization control unit 3 and timing diagrams explaining its operation are shown in FIG. 2. Block 3 generates the CSI 'and the SSI', delayed relative to the CSI and the SSI generated by the first television sensor 1, for a time within the respective frame duration and the length of the line of the television image. The sync signals CSI 'and SSI' are used to synchronize the second television sensor 2. By changing the delay time, the image produced by the first television sensor 1 is shifted relative to the image formed by the second television sensor 2. The adjustable delay is carried out using the standby multivibrator, and the formation of the CSI ' and CCI ', corresponding to the duration of the CSI and SSI using pulse shapers, for example, single-shot.

 The block diagram of the memory unit 5 is shown in figure 3. The memory unit 5 contains an ADC, RAM, DAC, a mode control unit (BUR), an address block, an address setting unit (BZA), and a distributor.

 The ADC input is the input of memory block 5, the output of block 5 is the output of the DAC. The clock signals received at the sync input of the memory unit 5 are synchronized by the ADC, DAC, BUR and BZA.

 The image signal generated in the mixer 4 video signals is fed to the ADC, where it is converted to digital form. The digital video signal is fed to the RAM input, to the control input of which a write / read mode control signal is generated, formed by the DRM. The design of the drill is shown in figure 4. The BUR generates a signal that transfers the RAM from the read-modify-write mode to the read mode when the STOP-FRAME switch is turned on. In the read-modify-write mode, a "pass-through" of the image signal through the RAM and the DAC, where the digital signal is converted to analog form, is output to the memory unit 5.

 Address signals for RAM are formed by the address block, the design of which is shown in Fig.5. The address block consists of a row counter and a column counter forming the row address and column address.

 At the same time, the column counter counts the sampling pulses along the row and is set to the initial state of the SSI, the row counter calculates the SSI and is set to the initial state of the SSI. Depending on the operating mode of the RAM, the CSI and SSI are either sent to the counter reset inputs (read-modify-write mode) or to the number setting inputs (read mode). Thus, the appeal is organized according to the matrix principle: the row address and column address uniquely determine the cells of the RAM matrix in memory block 5.

 The distribution of clock signals to the inputs of the installation or reset of the counters is made by the distributor, the design of which is presented in Fig.6. In the absence of a control signal from the control panel (read-modify-write mode), the distributor provides clock signals to the inputs of the number of counters. Upon receipt of the control signal from the control panel (reading mode), the distributor generates clock signals to the inputs of the number of counters. Thus, depending on the address code (row number, column number) coming from the BZA to the information inputs of the respective counters, it is possible to read information from a given starting address.

 The starting address of the row and column is set by the BZA, the execution of which is shown in FIG. 7 and which is made on reversible counters. By increasing (decreasing) the starting address of the line (by pressing the corresponding control key), the image is shifted up (down) in the frame. By increasing (decreasing) the starting address of the column, the image is shifted left (right) along the line. Thus, a fragmented view of the image recorded in the block 5 of the memory, when zoomed in by means of block 6.

 Block 6 scaling, the implementation of which is shown in Fig.8, operates as follows. The input of block 6 receives the clock signals from the output of the first television sensor 1. In normal mode, the clock signals through the switch of block 6 pass without change to the clock input of block 5 of the memory. When the scaling mode is switched on, through the switch of block 6, the sampling input of block 5 of the memory receives sampling pulses along the line and SSI, the repetition period of which is reduced by a factor of division using the divisors of block 6. The repetition period of the CSI does not change. As a result, the address block makes a change of addresses for RAM with a division factor of N 1, 2, depending on the design of the dividers in block 6, therefore, in the zoom mode, each image element stored in RAM is displayed on the screen of the video control unit 7 in the Nx1 scale.

 The full television signal from the output of the DAC of the memory unit 5 is supplied to the video monitoring device 7 for display.

 Thus, the introduction of new features expands the functionality of the device and provides a detailed comparison and identification of differences in the two studied images due to their combination, scaling of the combined image and its fragment-by-frame viewing on an enlarged scale.

Claims (1)

 A device for input-output images containing a first television sensor, the sync output of which is connected to the input of the synchronization control unit, a memory unit and a video control unit, characterized in that a second television sensor, a video signal mixer and a scaling unit, the input of which is connected to the sync output of the first a television sensor, the output of the synchronization control unit is connected to the sync input of the second television sensor, the video outputs of the first and second television sensors are connected to ervomu and second mixer inputs video signals, and whose output is the output of scaling unit are connected correspondingly with the information and the control inputs of the storage unit, whose output is connected to the input of the video control unit.

Images