SU1317474A1 - Device for scaling images - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used in output devices and visual display of graphic information. The purpose of the invention is to increase the speed and accuracy of the device, which is achieved by introducing into the switch 1 device two counters 8 and 9 and the image conversion unit 4 and the corresponding functional links, which allows simultaneous scaling of the entire image fragment. At the same time, the scaling time is practically determined by the output time of the fragment (row or column) to the indicator 10, since the delay in the conversion of the scale by the image conversion unit 4 is insignificant and can be neglected. Improving accuracy is achieved by the fact that the image of a fragment allows one to average the brightness of several elements when they are converted into one element. 1 3. p. F-ly, 4 ill. 5 C /)

Description

  :: D,) Genius is related to automation and computing techniques and can be used, g: H1;) in output devices and visual display of graphic information.

and, the purpose of the invention is to improve the speed and accuracy of the device.

FIG. I shows the block diagram of the device; in fig. 2 is a functional block diagram of image conversion; in fig. 3 is a functional block diagram of the control unit; in fig. 4 - control unit operation algorithm.

The device contains a switch 1, a memory block 2, a block 3 for setting scale factors, an image conversion unit 4, a control unit 5, a first register 6, a second register 7, a first counter 8, a second counter 9, an indicator 10, a third register 11, an electrical converter signals to optical 12, optical switches 13, optical voltage converters 14, a decoder 15 and an optical signal to electric converter 16.

The device works as follows.

At the initial moment of time, the information corresponding to the image frame is recorded in the first memory block 2, which is a random access memory (RAM).

The control unit 5, providing sequential reading from the RAM to the addresses specified by the first counter 8, regenerates the image on the indicator 10, and the information corresponding to the image line is stored in the second register 7. As in block 3, intended for storing scale factors, the original information is equal to), ts provides information transfer without large-scale transformations.

If it is necessary to scale the information, the value of the scale factors is recorded in block 3. Information from the outputs of block 3 is fed to the second information input of block 1 of the transformed images 4 and ensures the switching of the optical path corresponding to a given scaling factor. The control unit 5 initially generates the uravla signals in such a way as to ensure scaling along the x axis, and then the resulting image frame is scaled along the y axis.

The scale-up process is as follows.

The information of the row or column corresponding to the address determined by the contents of the first counter 8 is transferred from the Hyoka of the memory 2 to the first information input of the imaging unit 4, where the rest: 1 is written to the internal

converter buffer. According to the values of the scale factors, the obtained information is switched through the corresponding optical converter.

voltage 14, as a result of which, at the output of the converter, we obtain the value of a reduced or enlarged fragment of the image. This information is recorded in the second register 7 and displayed on the indicator 10. At the same time, it is occupied in the cells of the memory block corresponding to the original image fragment, whose address is determined by the contents of the first counter 8.

Repeat specified transformations for

5 of all horizontal pixels, a large-scale transformation of the image frame along the X coordinate is carried out, and the information stored on this coordinate is stored in the memory block. After performing these transformations, the process of scaling by the Y coordinate is carried out. The control unit generates a logical unit signal at the tenth output, which transfers the image frame to the first information input of the image conversion unit 4 from the memory block. The data obtained after scaling is recorded into the corresponding cells of the memory block defined by the contents of the second counter 9, as well as into the first register 16, which ensures their display on the screen. After performing the scaling operation of the image frame, which corresponds to the appearance of the signal at the transfer output of the second counter 9,

5, block 3 is set to the state "O." The scaling of the image frame is completed and the control unit performs the regeneration of a new image frame obtained as a result

,, transform

The scaling time of the proposed device is determined from the expression (N X M) T, where N X M n is the number of all image points; T - time scale and | image fragment.

five

The time T can be practically equal to the time of outputting a fragment (column or row) of the image to the indicator, since the delay in the conversion of a scale with the help of an optical transform & l voltages (focon) is not definite. If M, then the gain in speed compared to the prototype

2NiTj vJlB

52 N TT

where Te is the time to calculate the address of the massed image in a known device (prototype).

If we consider that T T, then the gain in speed is very significant.

Increasing the accuracy of scaling is achieved by the fact that the fragment image obtained using optical voltage converters makes it possible to average (integrate) the brightness of several elements when they are converted into one element. In known digital devices, respectively, the information output of the first counter is connected to the address input of the memory unit and the first address input of the indicator, the second address input of which is connected to the information output of the second counter, and the first and second information inputs to the outputs of the first and second registers, respectively control inputs of the first and

The scaling image arises from the second register is connected to the sixth and ambiguity when determining the informational seventh outputs of the correlation control unit at the image point, respectively, the first and second inputs of which

shcha several source. Known ana-connected to the outputs of the transfer of the first

scaling devices, axes and second counters, respectively, the eighth

new on beam deflection, not allowing the output of the control unit to be connected to the input

to achieve high accuracy due to a large 15 installation in the “About block setting of the coefficient of digital-analog and analog-digital-scale”; the information input of the kotonic transformations of the device is the second information input of the device, and the synchronous input is connected to

 The third input of the control unit is

Claims (2)

1. A device for scaling 20 by the first gating input of the device, images, comprising a memory unit, the ninth and tenth outputs of the control unit for setting the scaling factors, the control unit, the first and second registers and the indicator, characterized in that, in order to improve speed and device accuracy, it contains a switch, the first information input of which is the first information input of the device, the control input connected to the first 25 the output of the control unit, and the output, the innis, are connected to the write input and the second control input by the readout of the memory unit, respectively, and the fourth and fifth inputs are the second gating and mounting inputs of the device, respectively, 2. The device according to claim 1, wherein the image conversion unit contains a third register, the information the formation input of the first memory block, 0 and whose control inputs are an image conversion unit, the first and second information inputs of which are connected to the outputs of the memory block and the block for setting the scaling factors, respectively, the control input of the block with the first information and control inputs of the block, respectively, and the output connected to the input of the electrical signal to optical converter, whose outputs are optically connected to the information image is connected to the first inputs of the optical keys, to the control input of the read control, blocking inputs of which are KEY TO vypam minute and the second output of the control unit, and an output coupled to the decoder vhohodu information, the input of which is the second information input unit, the outputs of optical switches connected to the data input of the switch, and. the inputs of the optical converters on the first and second counters, installation inputs, the outputs of which are optically connected to the third output are connected to the converter inputs by the first and second registers and the second the control unit, and the counting inputs to the fourth and fifth outputs of the block of control signals to the electrical, the output of which is the output of the block. accordingly, the information output of the first counter is connected to the address input of the memory unit and the first address input of the indicator, the second address input of which is connected to the information output of the second counter, and the first and second information inputs to the outputs of the first and second registers, respectively inputs first and five they are connected to the write input and the second read control input of the memory unit, respectively, and the fourth and fifth inputs are the second gating and installation inputs of the device, respectively, 2. The device according to claim 1, wherein the image conversion unit contains a third register, the information the first information and control inputs of the block, respectively, and the output is connected to the input of an electrical signal to optical converter, the outputs of which are optically connected to informational signals into electrical ones, the output of which is the output of the block. FIG. 2 srig.z