KR19990032964A - Physical imaging device - Google Patents

Abstract

The real image device of the present invention includes a photoelectric conversion unit, an analog signal processing unit, a first digital signal processing unit, a second digital signal processing unit, a microcomputer, and a memory card access unit. The photoelectric conversion unit converts each color region of the incident light into an electrical signal. The analog signal processor processes each electrical signal from the photoelectric converter and converts the digital signal into a digital signal. The first digital signal processing unit processes each digital signal from the analog signal processing unit and outputs luminance data and chromaticity data. The second digital signal processing unit receives luminance and chromaticity data from the first digital signal processing unit and performs necessary image processing, and then inputs the second digital signal processing unit to the first digital signal processing unit or inputs it to a computer. The microcomputer controls the operation of the first and second digital signal processing units in accordance with an embedded algorithm. A memory card access unit, which is a feature of the present invention, stores image processing data from the second digital signal processing unit in accordance with a control signal from a microcomputer, and makes it possible to access the stored data again.

Description

Physical imaging device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a real image device, and more particularly, to a real image device that can store image data picked up by an image pickup device and display the stored image data as needed.

In general, the real image device refers to a device for processing an image signal from an image pickup device, for example, a CCD (Charge Coupled Device) image pickup device, which directly captures an object or material to be viewed, and displays it on a display device such as a monitor. .

Fig. 1 schematically shows a conventional system configuration of such a real image device. As shown in the drawing, a conventional real image apparatus includes a photoelectric converter 110, an analog signal processor 120, a first digital signal processor 130, a second digital signal processor 140, and a microcomputer 150. It is configured by.

The photoelectric conversion unit 110 converts the red (R) region, the green (G) region, and the blue (B) region of the incident light into an electrical signal, respectively, so that the output level is adjusted according to the luminance data for control.

The analog signal processor 120 processes each electrical signal from the photoelectric converter 110, removes high frequency noise, adjusts an amplitude, and converts the digital signal into a digital signal. To this end, the analog signal processor 120 includes a CDS / AGC (Correlated Double Sampler and Auto Gain Controller) device (not shown) and an analog / digital conversion device (not shown). The CDS / AGC device processes each electrical signal from the photoelectric converter 110 to remove high frequency noise and adjust amplitude. The analog / digital conversion element converts the analog signal from the CDS / AGC element into digital data and outputs the digital data.

The first digital signal processing unit 130 processes each digital signal from the analog signal processing unit 120 to output luminance data and chromaticity data (Y / C), and to control luminance data to be input to the photoelectric conversion unit 110. Generate.

The second digital signal processor 140 receives luminance data and chromaticity data (Y / C) from the first digital signal processor 130 and performs necessary image processing, for example, a process of creating an inverted, still, and divided screen. After that, it is inputted again to the first digital signal processor 130 or inputted to a computer.

The microcomputer 150 controls the operations of the first and second digital signal processors 130 and 140 according to an embedded algorithm.

However, the conventional real image apparatus configured as described above does not have a separate memory function for storing image data, and thus cannot display and use the displayed image data. Therefore, time and place constraints are involved, and in order to overcome this, the setting of the object must be repeated. In particular, when using a microscope attached, there is a problem that it is not easy to reset the correct setting of the sample.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a real image device capable of storing and reusing image data.

Fig. 1 is a block diagram schematically showing the system configuration of a conventional real image device.

Fig. 2 is a block diagram schematically showing the system configuration of a physical imaging device according to the present invention.

FIG. 3 is a block diagram showing a configuration of a memory card access unit of the real image device of FIG. 2.

<Description of Symbols for Main Parts of Drawings>

110, 210 ... photoelectric converter 120, 220 ... analog signal processor

130, 230 ... first digital signal processing unit

140, 240 ... second digital signal processing unit

150, 250 ... Microcomputer 260 ... Memory card access section

261 ... memory card 262 ... controller

In order to achieve the above object, the real image device according to the present invention includes a photoelectric conversion unit, an analog signal processing unit, a first digital signal processing unit, a second digital signal processing unit, a microcomputer and a memory card access unit.

The photoelectric conversion unit converts the red region, the green region and the blue region of the incident light into an electrical signal, respectively, so that the output level is adjusted according to the control luminance data. The analog signal processing unit processes each electrical signal from the photoelectric conversion unit, removes high frequency noise, adjusts an amplitude, and converts the digital signal into a digital signal. The first digital signal processing unit processes each digital signal from the analog signal processing unit, outputs luminance data and chromaticity data, and generates the control luminance data to be input to the photoelectric conversion unit. The second digital signal processing unit receives luminance data and chromaticity data from the first digital signal processing unit, performs necessary image processing, and then inputs the second digital signal processing unit to the first digital signal processing unit or to a computer. The microcomputer controls operations of the first and second digital signal processing units according to an embedded algorithm. The memory card access unit stores image processing data from the second digital signal processing unit in accordance with a control signal from the microcomputer, and allows the stored data to be accessed again.

Preferably, the memory card access unit includes a memory card for storing data by a control signal from the microcomputer, and a controller for inputting an address signal and a control signal to the memory card by a control signal from the controller. Include. The controller is configured using any one of a TTL gate circuit and a field programmable gate array.

Hereinafter, preferred embodiments of the present invention will be described in detail.

Referring to FIG. 2, the real image device according to the present invention includes a photoelectric converter 210, an analog signal processor 220, a first digital signal processor 230, a second digital signal processor 240, and a main controller. And a microcomputer 250 and a memory card access unit 260.

The photoelectric conversion unit 210 includes a CCD device (not shown) for converting the red (R) region, the green (G) region, and the blue (B) region of the light incident through the video camera lens into an electrical signal, respectively. And the output level is adjusted in accordance with the luminance data for control.

The analog signal processor 220 processes each electrical signal from the photoelectric converter 210 to remove high frequency noise, adjust the amplitude, and then convert the signal into a digital signal. To this end, the analog signal processing unit 220 processes each electrical signal from the photoelectric conversion unit 210 to remove high frequency noise and adjust the amplitude, and this CDS / AGC An analog / digital conversion element (not shown) for converting each analog signal from the element into each digital signal is provided.

Said first digital signal processing unit 230 processes each of the digital signal from the analog signal processor 220, the luminance data (Y), outputting a red data (C _R) and blue data (C _B) and the photoelectric conversion portion The control luminance data to be input to 210 is outputted. In addition, the first digital signal processor 230 may output the luminance data Y, the red data _Cr , and the blue data C _B according to the control signal from the microcomputer 250. ).

The second digital signal processor 240 receives luminance data and chromaticity data from the first digital signal processor 230 and performs necessary image processing, such as inverting, stopping, and dividing an image, and then performing a first digital signal. Re-enter the processor 230 or input it to a computer. To this end, the second digital signal processor 240 receives luminance and chromaticity data from the first digital signal processor 230 and performs image processing according to an image processing control signal from the microcomputer 250. A digital board (not shown) for inputting the processed luminance and chromaticity data back to the first digital signal processor 230 is embedded. On the other hand, in order to interface with the computer, receiving the luminance data and chromaticity data from the first digital signal processing unit 230 receives a compressed still image according to the set control signal and state information from the microcomputer 250 to the computer JPEG board (not shown) for transmission is built in.

The microcomputer 250 controls the operations of the first and second digital signal processors 230 and 240 according to an embedded algorithm, and in particular, sets the registers of the first digital signal processor 230.

The memory card access unit 260, which is a feature of the present invention, stores image processing data from the second digital signal processing unit 240 according to a control signal from the microcomputer 250, and accesses the stored data again. An apparatus, as shown in FIG. 3, includes a memory card 261 and a controller 262.

The memory card 261 is for storing image data by a control signal from the microcomputer 250, and the controller 262 processes the control signal from the microcomputer 250 to address the memory card 261. The operation of inputting a signal and a control signal is performed. In this case, the memory card 261 uses a memory element capable of storing compressed data, such as JPEG compressed data or uncompressed original data. When the capacity of the memory card 261 is 4 megabytes, 60 or more screens can be stored depending on the compression ratio when compressing an image, and about 5 screens can be stored even when the image is not compressed.

The controller 262 is configured according to the type of the memory card 261 using a transistor-to-transistor logic (TTL) gate circuit or a field-programmable gate array (FPGA). For example, when using a memory card 261 of a DRAM (Dynamic RAM) or SRAM (Static RAM) structure among the various memory elements, the controller 262 processes a control signal from the microcomputer 250, An address is input to the memory card 261 via the address line, and a control signal is input to the memory card 261 via the control line. At this time, the control signal should include a Low Address Strobe (RAS) and a Column Address Strobe (CAS) signal, a READ signal, and a WRITE signal indicating whether the address is low or column. When using a memory card 261 in the form of a flash memory, the controller 262 inputs an address through an address line in accordance with a control signal from the microcomputer 250, and writes WE (Write) through the control line. Control signals such as enable and output enable signals are input to the memory card 261. On the other hand, the flash memory has its own registers, which are set by the microcomputer 25.

As such, the controller 262 of the memory card access unit 260 is configured to generate a control signal suitable for the shape of the memory card 261 using a TTL gate circuit or an FPGA.

The overall signal processing process is as follows.

The electrical signal for each color output from the photoelectric converter 210 is removed by high frequency noise by the analog signal processor 220, the amplitude is adjusted, and then converted into digital data and input to the first digital signal processor 230. . In the first digital signal processor 230, the input red (R), green (G), and blue (B) signals are combined to be converted into one chroma signal and a luminance signal. Since the chroma signal and the luminance signal output from the first digital signal processor 230 are digital signals, an image cannot be directly displayed on a display device such as a monitor by using this signal. Therefore, a complex image signal must be generated by converting the chroma signal and the luminance signal into an analog signal by means of a luminance / chromium mixer or the like and combining them with each other. Then, an image is displayed by a display apparatus, such as a monitor, according to this composite image signal.

Meanwhile, the chromaticity and luminance signals from the first digital signal processor 230 are input to the second digital signal processor 240 by the control signal of the microcomputer 250. The second digital signal processing unit 240 processes the chromaticity and luminance signals input according to the signal processing control signal from the microcomputer 250 and inputs them back to the first digital signal processing unit 240 or a compressed image by a computer. Transfer the data or uncompressed original image data. Then, the data is transferred to the memory card access unit 260 through the data line. The controller 262 of the memory card access unit 260 processes the control signal from the microcomputer 250 and sends an address signal and a control signal to the memory card 261. The image data is stored through a data line connected to the second digital signal processor 240. When the memory card 261 is a flash memory, the registers of the flash memory are set by the microcomputer 250 before such an operation is performed. On the other hand, image data stored in the memory card 261 is output and used in accordance with the above operation. That is, the controller 262 of the memory card access unit 260 processes the control signal from the microcomputer 250 and sends an address signal and the control signal to the memory card 261. Then, the image data stored in the memory area of the memory card 261 designated by the address signal is transmitted through the data line connected to the second digital signal processing unit 240 in accordance with the control signal from the controller 262. It is input to the signal processor 240. As such, the image data input to the second digital signal processor 240 is directly processed by the first digital signal processor 230 or the second digital signal processor 240 and used again.

As described above, the real image device according to the present invention is capable of accessing a memory card, thereby storing and accessing necessary scenes and data, and reading image data stored in the memory card on a computer to display on a monitor connected to the computer. You can also edit.

The present invention is not limited to the above embodiments, and modifications and improvements are possible at the level of those skilled in the art.

Claims (3)

A photoelectric conversion unit for converting the red region, the green region, and the blue region of the incident light into an electrical signal, respectively, and the output level of which is adjusted according to the luminance data for control; An analog signal processor which processes each electrical signal from the photoelectric converter, removes high frequency noise, adjusts an amplitude, and converts the digital signal into a digital signal; A first digital signal processing unit processing each digital signal from the analog signal processing unit to output luminance data and chromaticity data and to generate the control luminance data to be input to the photoelectric conversion unit; A second digital signal processing unit which receives luminance data and chromaticity data from the first digital signal processing unit and performs necessary image processing, and then inputs the data again into the first digital signal processing unit or into a computer; A microcomputer controlling an operation of the first and second digital signal processors according to an embedded algorithm; And And a memory card access unit configured to store image processing data from the second digital signal processing unit in accordance with a control signal from the microcomputer, and to access the stored data again. The method of claim 1, wherein the memory card access unit, A memory card for storing data by a control signal from the microcomputer; And And a controller for inputting an address signal and a control signal to the memory card by a control signal from the control unit. The method of claim 2, And the controller is configured using any one of a TTL gate circuit and a field programmable gate array.