KR0170116B1 - Image data processing apparatus using linear ccd sensor - Google Patents

Abstract

Image data processing device using 1D Charge Coupled Device (Charge Coupled Device) sensor converts and amplifies the measured signal output after inputting multiple synchronization signals to 1D Charge Coupled Device sensor for compatible image data. An image signal processing apparatus having an optical system, comprising: a synchronization signal generator for generating a plurality of synchronization signals for driving the charge coupled device sensor and input / output of the generated synchronization signals and output data; A synchronizing signal supply unit for separating an input / output port and noise included in a plurality of synchronizing signals inputted from the input / output port and supplying only a pure synchronizing signal to the charge coupled device sensor; A charge coupled device sensor for outputting a call to the measurement signal input from the optical system by the synchronization signal supplied by the synchronization signal supply unit; A signal converting and amplifying unit for clipping the signal output from the charge coupling device sensor to a predetermined level, amplifying the clipped signal and outputting the signal to the input / output port; An analog / digital converter for converting the amplified video signal output through the input / output port into digital video data; And a storage unit for storing the digital image data converted by the analog / digital converter.

Description

Image data processing device using 1-dimensional charge coupled device sensor

1 is a diagram schematically showing the celestial configuration of a general image processing apparatus.

2 is a conceptual diagram of a general charge coupled device sensor.

3 is a block diagram of an image data processing apparatus using a one-dimensional charge coupled device sensor according to the present invention.

* Explanation of symbols for main parts of the drawings

10: input / output port 20: synchronization signal supply unit

30: charge coupled device sensor 40: signal conversion and amplification unit

100: data processing board 200: image signal processing unit

300: optical system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data processing apparatus using a one-dimensional charge coupled device (Charge Coupled Device) sensor, and more particularly, to convert a measurement signal output after inputting a plurality of synchronization signals to the one-dimensional charge coupled device sensor. It is a device to obtain compatible video data by amplifying and amplifying.

In general, the charge-coupled device sensor uses a method of sequentially transferring charges by directly using the physical phenomena of a semiconductor without specifying an address, and has three functions of receiving light, creating a charge, and transmitting the charge.

The charge coupled device sensor is a delay device capable of delaying a signal by accumulating information, and is particularly actively used as a solid state imaging device such as a video camera. For example, recently, there is an image pickup device having a pixel of 7 × 9 mm and a pixel of 768 × 490 horizontally and vertically.

On the other hand, the charge-coupled device sensor accumulates the charge of light to the pixel and transfers it in one direction, and removes the ghost phenomenon generated in the television. In addition to the radio waves entering, there is a wave that is reflected by the other side of the building or the pylon, and is slightly detoured to return late, which creates a ghost. Radio waves carry 300,000km per second, but still have a significant impact on the imager. Therefore, we pick up this late coming signal, add another signal to time it out and erase it. This erasing signal causes some of the correct television signal to be delayed by the ghost, deliberately, and uses a charge-coupled device sensor to do so. The charge-coupled device sensor acts as a temporary pocket to delay the signal.

In this one-dimensional camera, the driving signal from the signal divider is applied to the charge-coupled device sensor as shown in the overall configuration of FIG. 1 attached as a device for measuring the state of the beam on the screen using the one-dimensional charge-coupled device sensor. Part 1 for supplying the, part 2 for converting the output of the charge-coupled device sensor into a signal that the color concentration measurement board can handle, and part 2 for changing the signal to be similar to a human feel, and for the image to be accurately formed on the charge-coupled device sensor. It can be divided into the lens system 3 and the like.

The one-dimensional camera is composed of a one-dimensional charge coupling device, a part for receiving and supplying a plurality of synchronous signals for driving the signal from a signal splitter, and an amplifier stage for amplifying the output of the charge coupling device.

This one-dimensional charge coupled device sensor has 2,048 pixels, and is commonly used in hand scanners. When used together with transistor-transistor logic integrated circuits (TTLICs), a separate power supply is not required.

2 shows the general concept of the charge-coupled device sensor. D16-D31, which constitutes the front portion of the photodiode, and D32-D45, which are formed behind the photodiode, are hidden from light and are not used for the actual measurement. However, since the signal characteristics of the charge-coupled device sensor in the absence of light are shown, it can be used to determine the actual signal magnitude in the output of the charge-coupled device sensor. On the other hand, D0-D15 does not have a real photosensor, but merely a resistor for connecting the sensing area and the circuit of the output terminal.

As described above, the terminal for driving the one-dimensional charge coupling device includes an OD for supplying a 5V power source, an SS for grounding, an SH for transferring the charge accumulated in the photodiode, and a ø1 for transferring each charge in the transfer register. And ø2 and RS, BT to reset the output stage.

In operation using these terminals, that is, the SH signal can turn the shift gate on or off. When the shift gate is on, the charge Q accumulated in the photodiode moves to the transfer register, which means that the time taken to accumulate the charge is equal to the period of the SH pulse. The period of the SH signal is matched with the vertical deflection synchronization signal (V-Sync) of the television to prevent the measurement signal of the camera from changing due to the difference in the deflection signal of the television.

Once the SH signal is turned off, charges transferred to each cell of the transfer register are transferred one by one toward the output terminal by? 1 and? 2. The transferred charge is accumulated in the capacitor of the output stage, which changes the voltage of the output stage (V = Q / C).

This change in voltage is amplified by a current by the source-follower circuit, and this current flows through the load resistor R to appear in the output terminal OS in the form of a voltage.

On the other hand, after the signal of one cell is output, it is necessary to remove all the charge remaining in the capacitor of the output terminal in order to receive the signal of the next cell. The RS and BT signals are used here, and whenever these signals are applied in synchronization with ø1 and ø2, the capacitor at the output stage and the drain of the current amplifier stage are conducted to remove all the charge remaining in the capacitor for the output of the next cell. do.

As such, an image processing apparatus for obtaining image data by measuring a state of a beam on a screen using a charge coupled device sensor has a disadvantage in that it cannot be easily used because of lack of compatibility for each model.

The present invention has been made in view of the above disadvantages, and supplies a plurality of synchronization signals to the charge coupled device sensor, converts and amplifies the output signal output from the charge coupled device sensor to obtain a compatible image data It is an object to provide an image processing apparatus.

A feature of an image data input apparatus using a one-dimensional charge coupled device sensor according to the present invention for achieving the above object is a video signal processing apparatus having an optical system, the plurality of synchronization signals for driving the charge coupled device sensor The charge-coupled device sensor by separating the noise included in a plurality of sync signals inputted from the input / output port and the input / output port for inputting / outputting the generated sync signal and output data, A synchronization signal supply unit for supplying to the system; A charge coupled device sensor for outputting an image signal input from an optical system by a synchronization signal supplied by the synchronization signal supply unit; A signal converting and amplifying unit for clipping the image signal output from the charge coupled device sensor to a predetermined level, amplifying the clipped signal and outputting the clipped signal to the input / output port; An analog / digital converter for converting the amplified video signal output through the input / output port into digital video data; And a storage unit for storing the image data converted by the analog / digital converter.

Hereinafter, an image data processing apparatus using a one-dimensional charge coupled device sensor according to the present invention will be described with reference to the accompanying drawings.

3 is a block diagram of a device for processing image data using a one-dimensional charge coupled device sensor according to the present invention, a data processing board for generating a plurality of synchronization signals for driving the charge coupled device sensor 30 ( 100), an input / output port 10 for inputting / outputting the generated synchronization signal and output data, and a noise included in a plurality of synchronization signals inputted from the input / output port 10 to separate pure pure synchronization signals. A charge coupled device sensor 30 for outputting a measurement image signal input from the optical system 300 by the synchronization signal supply unit 20 to be supplied to the 30 and the synchronization signal supplied from the synchronization signal supply unit 20; A signal converting and amplifying unit 40 for clipping the signal output from the charge coupled device sensor 30 to a predetermined level, amplifying the clipped signal and outputting the signal to the input / output port; An analog / digital converter 130 for converting the amplified signal output through the input / output port into a digital signal; The storage unit 120 stores the signal converted by the analog / digital converter 130. Here, the analog / digital conversion unit 130 and the storage unit 120 are configured in the data processing board 100.

The synchronization signal supply unit 20 includes a plurality of integrated circuits for separating noise mixed in a plurality of synchronization signals input from the input / output port 10, and the signal conversion and amplification unit 40 includes the charge coupling device. It includes a differential amplifier for obtaining the difference between the two measured signals output from the output terminal of the sensor 30, limiting to within a predetermined voltage or clipping to a low signal level similar to the visual characteristics.

When described in detail with respect to the image data processing apparatus using a one-dimensional charge coupled device sensor according to the present invention configured as described above.

The one-dimensional charge coupled device sensor 30, which is a one-dimensional image sensor, requires a plurality of synchronization signals required for operation. These signals are made in the data processing board 100 and supplied to the camera through the signal distributor 110. In the camera, noise generated through a long line before supplying these signals to the charge coupled device sensor 30 is obtained. Since there is a need to remove V, an inverting integrated circuit is used to improve the waveform of these signals.

In this case, in the case of the inverted integrated circuit, all six signal lines can be processed. Therefore, one inverted integrated circuit is sufficient for the camera. However, the inverted integrated circuit uses one inverted integrated circuit for current supply. Therefore, it can be seen that the better characteristics are shown when the signals are dividedly supplied.

In this manner, the charge-coupled device sensor 30 is supplied with a synchronization signal, and the image signal input from the optical system by the synchronization signal is clipped to a predetermined level by the signal conversion and amplification unit 40, and then amplified to a predetermined level. .

Subsequently, the image signal amplified and output from the signal converter and amplifier 40 is supplied to the data processing board 100 through the input / output port 10 and the signal divider 110 to supply the analog / digital converter 130. ) Is converted into digital image data and then stored in the memory unit 120.

Therefore, in the camera, before the output signal of the charge coupled device sensor 30 is supplied to the signal splitter 110, it is necessary to convert the signal to enable the signal conversion in the analog / digital converter 130.

The analog / digital converter 120 used in the data processing board 100 should have an AC component within 2V as an output signal of the camera.

In addition, the charge coupled device sensor 30 has one more output terminal called DOS (Dark Signal Output) in addition to the signal output (OS), which is an output terminal of the measurement signal, where the DOS output signal when no light is input. it means.

That is, the output of the DOS is a value representing the amount corresponding to the signal generated by the vehicle body characteristics of the charge coupled device sensor 30 in the output of the signal output terminal OS. Find the difference in the outputs.

Therefore, it is necessary to find the difference between these signals before supplying the output signal of the charge coupled device sensor 30 to the signal distributor 110.

In addition, since the amount is related to the human eye in view of the concept of color concentration, it is necessary to change the output of the charge coupled device sensor 30 which is proportional to the intensity of light simply to be similar to the human visual characteristic. The visual characteristics of a person feel a large change in a region where the amount of light is small, while a saturation occurs in a region where the amount of light is large, and a person does not feel it even if the amount of light changes slightly.

This conversion of the camera's output to be similar to the human visual characteristics is called γ-correction, which is known to apply an appropriate log function to the amount of light.

In practice, however, the hardware implementation on the camera is inefficient. In other words, the output signal of the charge-coupled device sensor 30 is greatly amplified and clipped at a relatively low signal level so that the input emphasizes a portion smaller than this level and always outputs a constant value for the input larger than this level.

On the other hand, this signal is closer to the human visual characteristics through the non-linear analog / digital conversion unit 130 in the data processing board 100.

In this way, the amplification stage of the camera performs the function of finding the difference between the signals of the OS and DOS output stages, and converts the AC component to within 2V so as to be suitable for the analog / digital conversion unit 130 of the color concentration measurement board 100. There are three functions: limiting, and clipping the signal at low signal levels to resemble human visual characteristics.

As described above, in the present invention, a plurality of synchronization signals inputted to the input / output port 10 are input to the charge coupling device sensor 30 by separating the noise mixed in the synchronization signal from the synchronization signal supply unit 20 and charging the device. By converting and amplifying the measurement signal output from the output terminal 30 and outputting it to the input / output port 10, compatible image data can be obtained.

Claims (1)

An image signal processing apparatus having an optical system, comprising: a synchronization signal generator for generating a plurality of synchronization signals for driving the charge coupled device sensor, an input / output port for inputting / outputting the generated synchronization signal and output data, and the input / output port A synchronization signal supply unit for separating the noise included in the plurality of synchronization signals input from the plurality and supplying only the pure synchronization signal to the charge coupled device sensor; A charge coupled device sensor for outputting a call to the measurement signal input from the optical system by the synchronization signal supplied by the synchronization signal supply unit; A signal converting and amplifying unit for clipping the signal output from the charge coupling device sensor to a predetermined level, amplifying the clipped signal and outputting the signal to the input / output port; An analog / digital converter for converting the amplified video signal output through the input / output port into digital video data; And a storage unit configured to store the digital image data converted by the analog / digital converter.