KR100416737B1 - Apparatus and method for processing image data - Google Patents

Abstract

PURPOSE: An apparatus and a method are provided to display motion pictures having improved resolution in a real time basis, while allowing data of two-dimensional X-ray image sensor to be easily processed. CONSTITUTION: An apparatus comprises an image signal separating unit for dividing AxA pixels into N number of groups, switching pixels for each group, and simultaneously outputting N number of analog image signals from N number of pixels; a buffer unit for simultaneously converting the N number of analog image signals output from the image signal separating unit into N number of digital signals, and temporarily storing the N number of digital signals into N number of buffers; a storage unit for storing the data temporarily stored in the buffer unit, into N number of frame memories(38) by each of N number of groups divided by the image signal separating unit; and a control unit for simultaneously reading and coupling the N number of data stored in the storage unit, and displaying the data on an image display(43).

Description

Image data processing device and method

The present invention relates to an apparatus and method for processing image data, wherein an A x A two-dimensional X-ray image sensor array is first divided into N groups in circuits, and then the image signal from the video signal is moved in real time through an image display device. An image data processing apparatus for displaying a and a method thereof.

In the existing X-ray imaging apparatus, as a means of viewing an X-ray image, there is a method of using an X-ray film and an image system in which an image amplifier tube and a camera are combined. The only way to see it is to use an image amplifier and a regular CRT.

FIG. 1 is a schematic diagram schematically showing a configuration of an X-ray imaging system using a conventional image amplifier 11, and as shown here, an image amplifier 11, a camera system 12, and an A / D. It consists of a converter 13 and a video display device 14. The image amplifier 11 converts the X-ray image into light, which is converted by the camera system into an electrical signal, and then displayed by the image display device. However, when using an image amplification system, a high speed A / D conversion device is required to obtain high resolution digital data. This makes it difficult to fabricate circuits, as related peripherals must also operate at high speeds.

By using the two-dimensional X-ray image sensor, digital image data can be obtained more conveniently, and a video can be displayed through the image display device.

FIG. 2 is a block diagram showing a circuit configuration for storing and displaying digital image data in a digital image system constructed using a two-dimensional image sensor. As shown here, each pixel 22 of the image sensor 21 is illustrated. Sequentially from ((1,1) (2,1) (3,1) .... (N-1,1), (N, 1) (1,2) .... (N, N) ) When the video signal comes out, the signal is transmitted to the A / D converter 23 and converted into digital data, which is stored in the frame memory 24.

Next, by reading the data of the frame memory 24 and passing through the D / A converter 25, a video can be easily displayed in real time using a display device.

3 illustrates a switching order of pixels in the conventional X-ray image data processing apparatus described above.

In case of using the X-ray two-dimensional image sensor, the conventional technique requires a high speed A / D converter and a high speed peripheral circuit to process video data obtained in real time when the number of pixels of the sensor increases. Therefore, power consumption is increased due to the use of high-speed devices, and heat is also generated. Therefore, high-frequency driving pulses are required to drive the circuit at high speed, and noise caused by the driving pulses is induced to reduce resolution. have.

Therefore, if the number of pixels of the sensor increases, high speed A / D converters and memory devices are needed to implement video, and the number of pixels is reduced while the use of high speed A / D converters and related devices is reduced. There is a need for a method that enables real-time video processing through sensors.

The technical problem to be achieved by the present invention is a digital imaging in a general imaging system for displaying moving image data obtained through a two-dimensional X-ray image sensor array or a medical X-ray imaging apparatus or X-ray detector for obtaining a digital image The present invention provides a data processing apparatus and method for displaying data in real time and for processing data of a 2D image sensor having a large number of pixels at high speed.

1 is a schematic diagram schematically showing a configuration of an image system using a conventional image amplifier.

2 is a block diagram showing a circuit configuration for storing and displaying digital image data in a digital imaging system constructed using a conventional two-dimensional image sensor.

3 shows a switching order of pixels in a conventional X-ray image data processing apparatus.

4 is a block diagram showing a circuit configuration of an image data processing apparatus according to the present invention.

5 illustrates a separation form of pixels in the image data processing apparatus according to the present invention.

6 shows a data switching procedure in the image data processing apparatus according to the present invention.

7 illustrates a data storage form in a frame memory device in the image data processing apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

31: image detection unit 32: pixel switching unit

34: A / D converter 35: buffer memory

37: data switching unit 38: frame memory

40: address generator 41: data combiner

42: D / A converter 43: Image display unit

As shown in FIG. 4, the present invention provides an image display apparatus by inputting an image through an image sensor having A x A pixels including A rows and A columns, and processing the input image data. In the image data processing apparatus to be displayed on,

A video signal separation unit for dividing A x A pixels into N groups, switching pixels for each divided group to output N analog video signals simultaneously from N pixels, and N video outputs simultaneously from the video signal separation unit A buffer unit for simultaneously converting analog video signals into N digital signals and temporarily storing the converted N digital signals in N buffers, respectively;

The data temporarily stored in the buffer unit is divided into N frame memories for each N groups divided by the image signal separator, and the first data of the pixels in the first column of the image sensor is the first address of the frame memory 1. To be stored in,

Make sure that the first data of the second column is saved at address 1 + A / N of frame memory 2.

The first data of the Nth line is stored in the 1+ (N-1) A / Nth address of the frame memory N so that the video signal of a predetermined pixel is periodically stored in the predetermined frame memory address every Nth. Storage,

And a control unit that reads N data stored in N groups into storage units at the same time, combines them, and converts them into analog signals for display on an image display device.

Preferred embodiments according to the present invention will be described with reference to the accompanying drawings.

4 is a block diagram showing a circuit configuration of a high speed processing apparatus for digital image data according to the present invention;

As shown here, a two-dimensional image sensor composed of A × A pixels is divided into N sensor pixel groups on a circuit.

At this time, the number of pixels in each of the N groups is A / N × A (FIG. 5). Next, the A / D converter 34 and the pixel switching circuit 32 are connected to each sensor group to apply an A / D conversion pulse.

In this case, if A / N pixels are sequentially connected to the A / D converter 34 in the vertical direction in the order of pixel switching shown in FIG. 6, N digital data are output from N groups at the same time.

This data is stored in one buffer memory 35, and these data are sequentially stored in the buffer memory A, and the next vertical lines of data are stored in the buffer memory B.

That is, the data from the sensor of the previous row that was stored in the buffer memory A while converting the signal from the sensor pixel of the next vertical line into digital data through the A / D converter and then storing in the buffer memory B is stored in the data switching circuit ( It is transmitted to the frame memory 38 through 37. Such an operation occurs simultaneously in N groups of pixels corresponding to one vertical line of the 2D image sensor. This operation is the same as dividing into N of the two-dimensional image sensor and simultaneously processing, thus reducing the frequency of the data conversion pulse by N times.

Data from the next N buffer memory elements are stored in the N frame memory elements constituting the frame memory 6 again by the operation of the data switching circuit 37.

The role of this switching circuit is to locate the frame memory device where the data will be stored so that video can be displayed in real time.

First, the data of the first group of the N data groups of the first vertical line read simultaneously in the N buffer memories 35 are stored in the frame memory device 1, and the second group of data is stored in the frame memory device N. In this way, the data of the N-th group are stored in the third frame memory device, and the data of the N-th group are stored in the frame second frame memory device. After this operation, the data switching circuit operates so that the frame memory device positions are moved to the right one by one.

That is, the following data groups start to be stored sequentially from address A / N + 1 in the stored device of the data group of the first vertical line. However, when the data of the first and second lines stored in the frame memory device are converted to positions in the actual image sensor and compared, it can be seen that A / N shifted data is stored in one device. When the above operation is repeated, the frame memory device N, in which the first data of the first group of the N-th line is to be stored, is the frame memory device N, and the position in the device is A-A / N address. Therefore, the position where the first data of the first group of the N + 1th line is to be stored becomes the A + 1th of the frame memory device 1. According to the operation of storing the data stored in the frame memory, the first group of data of the first row is stored in the frame memory device 1, and the first data of the N + 1st row is stored in the next position. Periodically, the first data of the first group is stored in this device in the form of 1 address, 1 + A address, 1 + 2A, .... every 1 + Nth line. Next, the data of the Nth group of the first row is stored in the frame memory device 2, and the first data of the first group of the second row is stored at the next position, and then the data of the second group of the third row is stored thereafter. Here, the first data of the first group is stored every N + 2th lines. In this manner, a data storage form of the 2D image sensor stored in each frame memory device is shown in FIG. 7.

The following is a method of creating an image signal by reading data stored in each frame memory device. Since the data stored in the frame memory device is the same as in FIG. 7, an address corresponding to the data must be generated using the frame memory address generation circuit 40 so that the data of each frame memory device can be read. In frame memory device 1, the first data of the first line is at address 1. In frame memory device 2, the first data of the second line is at 1 + A / N. In frame memory device 3, the first data of the third line is located. Since the first data is at 1 + 2A / N and the first memory of the Nth line is located at 1+ (N-1) A / N in the frame memory device N, the first data of the N + 1th line is frame memory It is located at address 1 + A of device 1. Therefore, if address 1, 1 + A / N, 1 + 2A / N, ..., 1+ (N-1) A / N address are given to each frame memory device at the same time, N Up to the first data of the first line can be read simultaneously. Therefore, from the address generated by the frame memory address generation circuit 40, an address of itself is added to the frame memory element 1, an A / N address is added to the frame memory element 2 using an adder, and 2 A / By adding N addresses and adding (N-1) A / N addresses to the frame memory device N, an N number of data is output at the same time. If the same operation is repeated, all the first A data can be read and all data can be read sequentially.

Since the read data come out of N data at the same time, it should be delivered one by one to D / A converter. This operation is performed by the data separation circuit 41, which is composed of a data latch element and a decoder. The operation of this circuit first stores data simultaneously from the frame memory temporarily in a data latch. In order to read the temporarily stored data sequentially, the frequency of the pulse, which is reduced by N times, is increased by N times again and sequentially applied to the data latch through the decoder.N data is sequentially read out during the same period.D / A conversion It can be delivered to the device and this behavior can be repeated to obtain real-time video analog or digital signals.

The present invention enables the use of expensive high-speed electronic components by enabling high-speed real-time video display using low-frequency A / D converters and low-speed electronic components for image data obtained from a two-dimensional X-ray image sensor having a large number of pixels. Due to the high price of the device, the increase of the power consumption of the device, the generation of a lot of heat due to the increase of the power consumption, and the induction of high-frequency inflow due to the use of high-frequency, it is possible to display a higher resolution video on the display device in real time. It is possible to easily process data of 2D X-ray image sensor with many pixels.

Claims (8)

An image data processing apparatus for inputting an image through an image sensor having A x A pixels composed of A rows and A columns, and processing the input image data to display on the image display device. Video signal separation means for dividing the A x A pixels into N groups, switching the pixels for each group, and outputting N analog video signals simultaneously from the N pixels; Buffer means for simultaneously converting N analog video signals simultaneously output from the video signal separating means into N digital signals and temporarily storing the converted N digital signals in N buffers; Storage means for dividing and temporarily storing the data temporarily stored in the buffer means in each of N frame memories for each of N groups classified by the video signal separation means; And control means for simultaneously reading and storing the N pieces of data stored in N groups into the storage means, combining the same, and converting the data into analog signals for display on an image display device. The method of claim 1 wherein the buffer means, And two memory devices for each of the N groups separated by the video signal separation means, so that the two memory devices are switched and store the converted data alternately. According to claim 1, The storage means, Make sure that the first data of the pixel of the first column of the image sensor is stored in the first address of frame memory 1, the first data of the second column is stored in 1 + A / N address of frame memory 2, and the Nth line The first data of is stored in the 1+ (N-1) A / Nth address of the frame memory N, so that the video signal of a predetermined pixel is periodically stored in the predetermined frame memory address every Nth. Image data processing device. According to claim 1, wherein the control means, To read the first data at the same time, the address of its own generated in the frame memory 1 is read, the address to read the data from the 1 + A / N th frame in the frame memory 2, and 1+ (N-1) in the frame memory N Image data processing device characterized in that to read data from the A / N-th address. An image data processing method for inputting an image through an image sensor having A x A pixels composed of A rows and A columns, and processing the input image data to display on the image display device. (1) dividing the A x A pixels into N groups, switching the pixels for each divided group, and outputting N analog video signals simultaneously from the N pixels; (2) converting N analog video signals simultaneously output in step (1) into N digital signals at the same time and temporarily storing the converted N digital signals in N buffers, respectively; (3) The data temporarily stored in the step (3) is divided into N frame memories for each of the N groups classified in the step (1), and the first data of the pixels in the first column of the image sensor is stored. To be stored at the first address of frame memory 1, the first data of the second column is stored at 1 + A / N address of frame memory 2, and the first data of line N is 1+ of frame memory N. (N-1) storing the video signal of a predetermined pixel periodically at every N-th address by storing at the A / N-th address, and And (4) simultaneously reading the N pieces of data stored in the step (3), combining them, and converting the data into analog signals for display on an image display device. The method of claim 5, wherein the step (2) And two memory devices for each of the N groups separated in the step (1), wherein the two memory devices are switched to store alternately converted data. The method of claim 5, wherein the step (3) Make sure that the first data of the pixel of the first column of the image sensor is stored in the first address of frame memory 1, the first data of the second column is stored in 1 + A / N address of frame memory 2, and the Nth line The first data of is stored in the 1+ (N-1) A / Nth address of the frame memory N, so that the video signal of a predetermined pixel is periodically stored in the predetermined frame memory address every Nth. Image data processing method. The method of claim 5, wherein the step (4) To read the first data at the same time, the address of its own generated in the frame memory 1 is read, the address to read the data from the 1 + A / N th frame in the frame memory 2, and 1+ (N-1) in the frame memory N Image data processing method characterized in that to read data from the A / N-th address.