KR100765010B1 - Image signal control system of camera module and image signal measuring method of camera module - Google Patents

Abstract

Image signal control system of the camera module according to the present invention is provided in the camera module, the image sensor unit for outputting a digital video signal; An encoding unit connected to the image sensor unit to convert the digital image signal into an analog signal and output the analog signal; And a controller configured to receive register values of the image sensor unit and the encoding unit from a user and input the register values to the image sensor unit and the encoding unit. In addition, the video signal control system of the camera module according to the present invention analyzes the analog signal output from the encoder to display a display for outputting the analog signal output from the encoder and the monitoring unit for displaying the analysis results in a quantitative graph display It is characterized by further comprising a part.

According to the present invention, it is possible not only to measure the function of the camera module but also to perform measurement by changing the register value and to perform accurate and quantitative analysis, thereby finding the optimum register value according to the camera module product. In addition, by providing a high-speed conversion of the digital signal of the camera module to an analog signal can provide a video signal control system of the camera module that can be interlocked with other external applications using the analog video signal as an input.

Description

Image signal control system of camera module and image signal measurement method of camera module {Image signal control system of camera module and image signal measuring method of camera module}

1 is a block diagram schematically showing the components of a video signal measuring system of a conventional camera module.

2 is a diagram illustrating a control display screen used in a video signal control system of a conventional camera module.

3 is a block diagram schematically illustrating components of a video signal control system of a camera module according to a first embodiment of the present invention;

Figure 4 is a block diagram schematically showing the internal configuration of the monitoring unit of the video signal control system of the camera module according to the first embodiment of the present invention.

5 is a diagram illustrating a display form of luminance level and color saturation measured by a monitoring unit included in an image signal control system of a camera module according to a first embodiment of the present invention;

6 is a diagram illustrating a display form of a synchronization signal measured by a monitoring unit included in a video signal control system of a camera module according to a first embodiment of the present invention.

7 is a block diagram schematically illustrating components of a video signal control system of a camera module according to a second embodiment of the present invention.

8 is a block diagram schematically illustrating components of a video signal control system of a camera module according to a third embodiment of the present invention.

9 is a flowchart illustrating a method of measuring a video signal of a camera module according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

100: video signal control system of the camera module

110: image sensor unit 120: encoding unit

130: control unit 140: interface unit

150: monitoring unit 151: analog signal analysis unit

152: sync waveform analysis unit 153: image level analysis unit

154: image noise analysis unit 155: quantitative value calculation unit

156: display unit 160: display unit

The present invention relates to a video signal control system of a camera module and a video signal measuring method of a camera module.

Currently, mobile communication terminals such as mobile phones, smart phones, PDAs (Personal Digital Assistants), DMB (Digital Multimedia Broadcasting) phones, laptops, and the like have camera modules embedded therein to capture and store images.

Such a camera module is used for not only a mobile communication terminal but also a monitoring device such as a rear sensing device of a vehicle, a toy, a public place, etc. The camera module is provided with an image sensor element as an essential component.

Image sensor elements usually have register values registered and have sensing criteria such as constant image level, phase, shading, and contrast. Generally, when manufactured by a company, register values are set to default values of the same standard and shipped.

However, the image sensor device has a difference in sensing function for each product during the production process, and even if the same default value is set, there is still a relative difference in the sensing function. Therefore, when applied to a general product as a camera module, the register value may be tuned. There is a need.

Therefore, in order to tune, it is necessary to measure the video signal of the camera module. Looking at the video signal measurement system of the conventional camera module is as follows.

1 is a block diagram schematically illustrating the components of a video signal measuring system 10 of a conventional camera module.

Referring to FIG. 1, a video signal measuring system 10 of a conventional camera module includes a camera module 12, a buffer board 14, an interface board 16, and a computer 18 as a target to be measured. 18 includes a driver program 18a and a viewer program 18b.

First, referring to the connection structure of the video signal measuring system 10 of the conventional camera module, the connector of the camera module 12 is connected to the buffer board 14, the buffer board 14 through the I2C line interface board Connected with (16).

In addition, the interface board 16 is connected to the computer 18 through a peripheral component interconnect (PCI) line.

In the conventional measurement system, since the I2C interface is mostly standard for controlling the camera module, the buffer board 14 and the interface board 16 perform I2C communication, and the buffer board 14 of the camera module 12 It converts the connector signal specification into the signal for I2C communication.

The interface board 16 has a PCI parallel interface card and transmits high-speed image data transmitted as a signal for I2C communication to the computer 18.

As described above, the computer 18 includes a driver program 18a and a viewer program 18b, and the driver program 18a performs various filtering processing of image data transmitted through the interface board 16 to analyze data. Create and switch to the chart.

The driver program 18a has 16 drive channels, which means that 16 items of data can be analyzed.

2 is a diagram illustrating a control display screen used in the video signal control system 10 of the conventional camera module.

According to FIG. 2, it can be seen that the data analyzed through the viewer program 18b is displayed in a chart. On the screen, the image output state A, the measured value B, and the measurement condition C of the camera module 12 are displayed. You can see that) are displayed.

The characteristics of the image signal measuring system 10 of the conventional camera module are as follows.

First, two program power sources are provided as power supplies for the camera module, and correspond to a power level of about 8V to 3.3V.

Second, various image formats such as YUV422, RGB565, and H.603 can be analyzed, and image measurement standards necessary for evaluating camera modules such as image level, phase, shading, contrast, and image noise are provided.

Third, analog signals can be measured in addition to image measurement such as DC / AC voltage, current measurement, resistance measurement, and frequency measurement (about 10 KHz).

Fourth, the analysis data can be preserved with a filter, and statistical data can be calculated based on the analysis data.

However, since the image signal measuring system 10 of the conventional camera module is based on a parallel transmission method, the transmission speed is slow, so that measurement time is long, and a register value of a camera module set by a company cannot be read.

In addition, the video signal measuring system 10 of the conventional camera module analyzes the video signal of the camera module as a digital value based on the register value set by the company, and inputs various register values to operate the camera module in different environments. There is a problem that cannot be analyzed.

Therefore, even if the company knows the register value set by the manufacturer, there is no limit to accurately interpreting the analyzed digital value, and it is difficult to grasp the difference in sensing function among camera module products.

That is, since the measurer must passively rely on the measurement system, it is very difficult to calculate the error of the measured value, and the measured value is not an objective comparable numerical value.

For this reason, according to the video signal measuring system 10 of the conventional camera module, since the measurer can only detect a camera module product that causes abnormal operation exceeding a predetermined standard, the utilization thereof is very low as compared to an expensive system.

Therefore, the present invention not only measures the function of the camera module but also performs the measurement by changing the register value, thereby controlling the image signal of the camera module that can find the optimal register value according to the camera module product and implant it into the image sensor of the camera module. It is an object to provide a system.

In addition, the present invention has an interface capable of high-speed transmission of data, and the camera module that can be linked to the surveillance equipment, amusement rides, security equipment, etc. to which the image data is applied by optimizing the register value for the camera module implantation according to the camera use environment Another object of the present invention is to provide a video signal control system.

In addition, the present invention reads the initial register value set by the camera module manufacturer, analyzes the video signal of the camera module as a quantitative analog signal, input the test register value to the real-time camera module to find the optimal register value Another object of the present invention is to provide a video signal measuring method of a camera module.

In order to achieve the above object, the video signal control system of the camera module according to the present invention is provided in the camera module, the image sensor unit for outputting a digital video signal; An encoding unit connected to the image sensor unit to convert the digital image signal into an analog signal and output the analog signal; And a controller configured to receive register values of the image sensor unit and the encoding unit from a user and input the register values to the image sensor unit and the encoding unit.

In addition, the video signal control system of the camera module according to the present invention is characterized in that it further comprises a monitoring unit for analyzing the analog signal output from the encoding unit to display the analysis result in a quantitative graph.

In addition, the video signal control system of the camera module according to the present invention is characterized in that it further comprises a display unit for outputting the analog signal output from the encoding unit on the screen.

In addition, the display unit of the video signal control system of the camera module according to the invention is characterized in that it is provided as a vehicle rear monitoring device.

In addition, the video signal control system of the camera module according to the present invention is characterized in that it further comprises a detection control device using the analog signal output from the encoding unit as a control signal.

In addition, the image sensor of the video signal control system of the camera module according to the present invention is characterized in that for outputting a YUV digital video signal.

In addition, the encoding unit of the video signal control system of the camera module according to the present invention is characterized in that for outputting an NTSC analog signal.

In addition, the control unit of the video signal control system of the camera module according to the present invention is characterized in that connected to the image sensor unit and the encoding unit through an I2C line.

In addition, the control unit of the video signal control system of the camera module according to the present invention is characterized in that the register value is selected via a computer on which a register value input program is executed.

In addition, the control unit of the video signal control system of the camera module according to the invention is characterized in that connected to the computer via the RS232C line.

In addition, the control unit of the video signal control system of the camera module according to the present invention is characterized in that the register value is selected through the numerical input device.

In addition, the monitoring unit of the image signal control system of the camera module according to the present invention is characterized in that for analyzing any one or more of the characteristic value of the power line, power supply voltage, current consumption of the characteristic value of the analog signal.

In addition, the monitoring unit of the video signal control system of the camera module according to the present invention any one of the waveform, screen angle, luminance level, color saturation, color phase difference, RGB level, contrast, signal noise of the characteristic value of the analog signal It is characterized by analyzing the above characteristic value.

In order to achieve the above object, a video signal measuring method of a camera module according to the present invention includes an image sensor unit for outputting a digital video signal, an encoder for converting the digital video signal into an analog signal, and outputting a register value. An image of a camera module including a control unit for receiving a selection and inputting the image sensor unit and an encoding unit, a monitoring unit analyzing the output analog signal to display an analysis result as a quantitative graph, and a display unit for outputting the output analog signal A signal measuring system, comprising: inputting register values of the image sensor unit and the encoding unit as initialization values through the control unit; A plurality of register values for the encoder are input through the controller and a final register value for the encoder is selected and output to the controller as the screen is output through the display; And a plurality of register values for the image sensor unit are input through the control unit, and a final register value for the image sensor unit is selected and input to the control unit as the analysis result is displayed through the monitoring unit. .

In addition, the step of selecting the final register value for the image sensor unit of the video signal measurement method of the camera module according to the present invention and input to the control unit, the monitoring unit waveform of the characteristic value of the analog signal, screen angle, Characteristic value of any one or more of the luminance level, color saturation, color phase difference, RGB level, contrast, signal noise is characterized in that the display results.

Hereinafter, a video signal control system of a camera module and a video signal measuring method of a camera module according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram schematically illustrating the components of the video signal control system 100 of the camera module according to the first embodiment of the present invention, and FIG. 4 is an image of the camera module according to the first embodiment of the present invention. A block diagram schematically showing an internal configuration of the monitoring unit 150 of the signal control system 100.

First, the image signal control system 100 of the camera module according to the first embodiment of the present invention is a system for performing a signal measurement and tuning function of the image sensor.

3, the image signal control system 100 of the camera module according to the first embodiment of the present invention includes an image sensor unit 110, an encoding unit 120, a control unit 130, a monitoring unit 150, and an interface. 4, the monitoring unit 150 includes an analog signal analysis module 151, a sync waveform analysis module 152, and an image level analysis module 153. ), An image noise analysis module 154, a quantitative numerical calculation module 155, and a screen display module 156.

The image sensor unit 110 is provided in the camera module and outputs a digital video signal, and outputs a YUV 8-bit digital video signal. For example, a VGA CMOS sensor may be used as the image sensor unit 110.

The YUV method focuses on the fact that the human eye is more sensitive to brightness than color, and the color components are represented by the Y component of brightness and the U (inphase) component and the V (quadrature) of chrominance. ) Into components. Since the Y component is sensitive to error, it codes more bits than the color components U and V. Generally, the ratio Y: U: V is 4: 2: 2.

The encoding unit 120 is connected to the image sensor unit 110 and receives a digital image signal from the image sensor unit 110 and converts it into an analog signal.

The encoder 120 may be implemented by various encoder chips. However, the encoder chip may be implemented as an encoder chip for converting a received YUV 8-bit digital video signal into an NTSC analog signal.

The controller 130 is a central computing device such as a microprocessor and a microcomputer, and includes an interface unit 140 and is connected to the image sensor unit 110 and the encoding unit 120 through an I2C line.

The I2C is a transmission line mainly used for control and can control a large number of chips in parallel using only two lines. The information included in the signal includes a synchronous clock, address, data, data start / stop information, and the transmission speed can be as low as 100kbps to 400kbps.

The image sensor unit 110 and the encoding unit 120 may have a unique address (7 bits) with the control unit 130, respectively, and may transmit and receive bidirectionally.

The controller 130 selects a register value to be applied to each of the image sensor 110 and the encoder 120 from a user and inputs the register value to the image sensor 110 and the encoder 120.

Here, the controller 130 includes an interface unit 140 to receive a register value for the image sensor unit 110 and a register value for the encoding unit 120 from the user.

The interface unit 140 may be implemented in various forms. For example, the interface unit 140 may include a numeric input device such as a keypad. In this case, the controller 130 may include a program for interpreting the input value as a register value.

In addition, the interface unit 140 is a computer on which a numerical input program is executed, and is connected to the controller 130 through an RS-232C line, and the numerical input program is used by the user for the image sensor unit 110 and the encoding unit 120. For example, the register number can be categorized to provide a graphical user interface for easy entry of various register values.

That is, when a register value is input, the controller 130 selectively transmits the register value to the image sensor unit 110 and the encoding unit 120, and the image sensor unit 110 and the encoding unit 120 respectively transfer the register value. Is written in its own memory to change the sensing criteria or encoding criteria.

The display unit 160 is a device for processing an NTSC signal and outputting a screen like an analog TV. In the first embodiment of the present invention, the display unit 160 is used to tune the encoder 120.

The process of tuning the encoding unit 120 by determining that it is a screen output from the display unit 160 will be described below in detail with reference to a method of measuring an image signal of a camera module according to the present invention.

Similar to the display unit 160, the monitoring unit 150 displays a result of outputting an image signal of a camera module according to register value registration. The display unit 160 simply outputs an analog signal to a screen. On the contrary, the monitoring unit 150 analyzes the analog signal output from the encoding unit 120 and displays the analysis result in a quantitative graph.

As the monitoring unit 150, for example, a device such as "NTSC waveform monitor / vectorscope" may be used. The function thereof will be described with reference to FIG.

As described above, the monitoring unit 150 is analog signal analysis module 151, synchronous waveform analysis module 152, image level analysis module 153, image noise analysis module 154, quantitative numerical calculation module 155 And the display module 156, wherein the analog signal analysis module 151 includes a resistance value of a power line, a power supply voltage, the image sensor unit 110, an encoding unit 120, and a controller 130. Analyze the characteristics of the analog signal, such as the current consumption during operating or standby mode.

The sync waveform analysis module 152 analyzes the level and frequency of the VSYNC waveform because the horizontal sync signal is aligned based on the vertical sync signal when the analog signal forms a screen.

In addition, the sync waveform analysis module 152 measures the screen angle to obtain a position correction value. The position correction value is also an internal variable which is a kind of register value, and the value when the optimal matching is made is used as the correction value of the screen angle.

The image level analysis module 153 receives a predetermined area and measures the luminance Y level and the saturation degree C of the color in the designated area.

The image level analysis module 153 measures the phase difference (hue) of color, calculates the maximum, minimum, and average values by measuring the respective RGB levels, and calculates the difference between the maximum and minimum values of the Y level, that is, the contrast value. Calculate

The image noise analysis module 154 detects when a noise component is generated in the input image, such as when a sensor of the camera module is damaged or a scratch is generated on the lens.

The image noise analysis module 154 detects noise components by dividing the entire image into predetermined mask regions and signal processing each pixel through an interpretation technique.

That is, the analog signal analysis module 151, the sync waveform analysis module 152, the image level analysis module 153, and the image noise analysis module 154 each have their own filtering functions, so that the analog signal characteristic value and the digital signal It is to calculate the characteristic value of.

Whereas conventional measurement systems do not read register values immediately and display the measurement results as digital values based on digital signals, in order to understand the measurement results as absolute values or to match the register values, the measurement has to be separately analyzed. The monitoring unit 150 according to the present invention can immediately read the register value and obtain a quantitative measurement value based on the analog signal, so that the measurer can grasp various functions of the camera module at the same time as the measurement.

On the other hand, the quantitative numerical calculation module 155 is the measured value filtered / analyzed by the analog signal analysis module 151, synchronous waveform analysis module 152, image level analysis module 153 and image noise analysis module 154 Convert it so that it can be expressed as an absolute comparison.

The screen display module 156 displays the converted numerical value on a constant interface graphic screen.

FIG. 5 is a diagram illustrating a display form of luminance level and color saturation measured by the monitoring unit 150 included in the video signal control system 100 of the camera module according to the first embodiment of the present invention. FIG. 1 is a diagram illustrating a display form of a synchronization signal measured by the monitoring unit 150 included in the video signal control system 100 of the camera module according to the first embodiment of the present invention.

Referring to FIG. 5, the monitoring unit 150 confirms that a waveform of luminance level and color saturation obtained by analyzing an analog image signal is displayed on a vertical coordinate system. Referring to FIG. 6, the monitoring unit 150 It can be seen that the synchronization signal obtained by analyzing the analog image signal is displayed in the vector mode on the vertical coordinate system.

Hereinafter, a description will be given of the video signal control system (200, 300) of the camera module according to the second and third embodiments of the present invention, the second embodiment (200) and the third embodiment of the present invention ( Similar to the video signal control system 100 of the camera module according to the first embodiment described above, the 300 is similar to the core functions such as converting a digital video signal into an analog video signal and tuning a register value. The different analog video signals are applied to other external devices.

FIG. 7 is a block diagram schematically illustrating components of an image signal control system 200 of a camera module according to a second embodiment of the present invention.

Referring to FIG. 7, the video signal control system 200 of the camera module according to the second embodiment of the present invention may include an image sensor 210, an encoder 220, a controller 230, an interface 240, and monitoring. It comprises a device 250, wherein the image sensor unit 210, the encoding unit 220, the control unit 230 and the interface unit 240 is a component that performs the same function as the first embodiment described above. .

Therefore, descriptions of the image sensor 210, the encoder 220, the controller 230, and the interface 240 that perform the same functions as those of the first embodiment will be omitted.

On the other hand, the monitoring device 250 is a screen output device that requires an analog video signal, for example, can be used as a vehicle rear monitoring device.

The image sensor unit 210, the encoding unit 220, the control unit 230, and the interface unit 240 may be manufactured as a single chip D by constructing a front-end module. The monitor 250 is installed at the rear of the, connected to the chip (D) can be installed in the driver's seat for the convenience of the driver.

That is, as in the first embodiment described above, the chip D may be temporarily connected to the monitoring unit 150 and the display unit 160 to find and transplant an optimal register value of the camera module to match the usage environment, and to monitor the monitoring unit. Since the monitoring device 250 may be connected instead of the 150 and the display unit 160, the camera module applicable to the monitoring device 250 for various purposes such as day / night and indoor / outdoor use may be tuned.

FIG. 8 is a block diagram schematically illustrating components of an image signal control system 300 of a camera module according to a third embodiment of the present invention.

Referring to FIG. 8, the image signal control system 300 of the camera module according to the third embodiment of the present invention includes an image sensor unit 310, an encoding unit 320, a control unit 330, an interface unit 340, and a detection unit. It comprises a control device 350, wherein the image sensor 310, the encoding unit 320, the control unit 330 and the interface unit 340 is configured to perform the same function as the first embodiment described above. to be.

Therefore, descriptions of the image sensor 310, the encoder 320, the controller 330, and the interface 340 performing the same functions as those of the first embodiment will be omitted.

Like the first embodiment described above, the third embodiment of the present invention also detects the image sensor unit 310, the encoding unit 320, the control unit 330, and the interface unit 340 formed of one chip D. As a configuration in which the control device 350 is connected, the detection control device 350 refers to a device that analyzes an analog video signal and transmits a control signal.

For example, the detection control device 350 may be used in a toy or a security system, and may be used by tuning a register value without having to manufacture a chip according to the type of toy and the purpose of the security system.

As described above, although the first embodiment described above has a basic function of measuring and tuning the register values of the camera module, the analog video signal is added by adding another application device to the encoding unit 120 to which the analog signal is output after the process is completed. It is possible to configure a control system that is applicable to any system that requires the system.

Hereinafter, a video signal measuring method of a camera module according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. The video signal measuring method of the camera module according to an exemplary embodiment of the present invention is described above. It is assumed that the measurement method using the image signal control system 100 of the camera module according to the embodiment.

9 is a flowchart illustrating a method of measuring a video signal of a camera module according to an embodiment of the present invention.

First, the measurer operates the controller 130 to input the initialization values to the image sensor 110 and the encoder 120, respectively (S100).

Here, it is preferable to input the default value obtained from the sensor company and the encoder company as the initialization value to the image sensor and the encoding unit 120, respectively.

Subsequently, when the video signal control system 100 of the camera module according to the first embodiment of the present invention is driven, the measurer checks the screen output state through the display unit 160.

In this case, since the display unit 160 processes the NTSC signal output from the encoding unit 120 in real time, the measurer can check the actual screen input from the camera module.

The measurer first compares the screen of the display unit 160 with the actual subject to process the tuning of the encoder unit.

The measurer operates the register value debugging program provided by the interface unit 140 to cause the controller 130 to transmit various register values to the encoding unit 120 (S110).

Various register values are transferred, and the encoder 120 registers them in its own memory to differentiate analog video signals output from the encoder 120.

Accordingly, the display unit 160 outputs a differentiated image for each register value (S120), and the measurer checks the change in image quality through the display unit 160.

In this case, the measurer may check the image of the display unit 160 and use a color bar chart to evaluate the color expression degree of image quality.

The measurer compares the color bar chart and the image of the display unit 160 to find an optimal image quality, selects a register value at this time, and finally implants the encoded value into the encoder 120 (S130).

When tuning of the encoding unit 120 is finished through the above process, tuning of the image sensor unit 110 is performed. Since the image sensor unit 110 is sensitive to the surrounding environment, the test is always performed under the same lighting environment at the same place. Should be implemented.

First, the measurer operates the register value debugging program provided by the interface unit 140 to cause the controller 130 to transmit various register values to the image sensor unit 110 (S140).

Various register values are transferred, and the image sensor unit 110 registers it in its own memory to differentiate the image signal sensed by the image sensor unit 110 and the analog image signal processed by the encoding unit 120.

Accordingly, the monitoring unit 150 outputs a differentiated image for each register value, and displays the analysis result of various items in the waveform / vector mode as described above (S150).

At this time, the measurer is also preferably using a color bar chart (Color Bar Chart) to evaluate the color representation of the image quality while checking the image of the monitoring unit 150.

The measurer compares the color bar chart and the image of the display unit 160 to find an optimal image quality, and analyzes the waveform in the waveform / vector mode, that is, the waveform, screen angle, luminance level, color saturation, and color of the synchronization signal. By checking the standard waveforms such as phase difference, RGB level, contrast, and signal noise more precisely, it is easier to find the optimal register value.

The measurer finally determines the optimal register value and manipulates the control unit 130 so that the determined register value is implanted into the image sensor unit 110 (S160).

When the tuning of the image sensor unit 110 and the encoding unit 120 is completed through the above process, the measurer separates only the image sensor unit 110 and directly connects the CRT monitor to process the digital image signal. Finally, you will be able to check the video that is output as a digital signal.

The present invention has been described above with reference to the preferred embodiments, which are merely examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not possible that are not illustrated above. For example, each component specifically shown in the embodiment of the present invention can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

According to the present invention has the following effects.

First, according to the present invention, it is possible not only to measure the function of the camera module but also to perform measurement by changing the register value and to perform accurate and quantitative analysis, thereby finding the optimum register value according to the camera module product. Therefore, according to the present invention, there is an effect that can provide a video signal control system of a camera module that can be utilized for research as well as finding a defective product.

Second, according to the present invention, the optimum register value can be found and implanted into the camera module, so that the sensing function of the camera module can be tuned according to the intended use, and the analog signal is transmitted by converting the digital signal of the camera module into an analog signal at high speed. It is possible to provide a video signal control system of a camera module that can interoperate with other external applications that receive a video signal.

Third, the conventional frame rate of the video is low, so that the tuning time of the camera module takes a lot, according to the present invention, since the actual video frame rate is secured, real-time tuning is possible.

Claims (16)

An image sensor unit provided in the camera module and outputting a digital image signal; An encoding unit connected to the image sensor unit to convert the digital image signal into an analog signal and output the analog signal; And And a control unit configured to receive register values of the image sensor unit and the encoding unit from a user and input the register values to the image sensor unit and the encoding unit. The method of claim 1, And a monitoring unit for analyzing the analog signal output from the encoding unit and displaying the analysis result in a quantitative graph. The method of claim 1, And a display unit for outputting an analog signal output from the encoding unit to a screen. The display apparatus of claim 3, wherein the display unit Image signal control system of the camera module, characterized in that provided as a vehicle rear monitoring device. The method of claim 1, And a sensing control device using the analog signal output from the encoding unit as a control signal. The method of claim 5, wherein the detection control device Image signal control system of the camera module, characterized in that provided as a ride control device or a security system control device. The method of claim 1, wherein the image sensor unit A video signal control system of a camera module, characterized by outputting a YUV digital video signal. The method of claim 1, wherein the encoding unit Video signal control system of the camera module, characterized in that for outputting NTSC analog signals. The method of claim 1, wherein the control unit The image signal control system of the camera module, characterized in that connected to the image sensor unit and the encoding unit through an I2C line. The method of claim 1, wherein the control unit And a register value is selected through a computer on which a register value input program is executed. The method of claim 10, wherein the control unit Image signal control system of the camera module, characterized in that connected to the computer via the RS232C line. The method of claim 1, wherein the control unit The video signal control system of a camera module, characterized in that the register value is selected through a numerical input device. The method of claim 2, wherein the monitoring unit The image signal control system of the camera module, characterized in that for analyzing any one or more of the characteristic value of the power line of the analog signal, the power supply voltage, the current consumption. The method of claim 2, wherein the monitoring unit The image signal control system of the camera module, characterized in that any one or more of the characteristics of the analog signal waveform, screen angle, luminance level, color saturation, color phase difference, RGB level, contrast, signal noise of the analog signal. An image sensor unit for outputting a digital image signal, an encoder for converting the digital image signal into an analog signal, and outputting the controller; a controller for selecting a register value and inputting the register value to the image sensor unit and the encoder; and analyzing and analyzing the output analog signal In the video signal measurement system of the camera module comprising a monitoring unit for displaying the results in a quantitative graph and a display unit for outputting the output analog signal, Inputting register values of the image sensor unit and the encoding unit as initialization values through the control unit; Inputting a plurality of test register values for optimizing the encoding unit through the control unit and inputting a test register value for the encoding unit selected according to a display output result of the display unit to the control unit; And And a plurality of test register values for optimizing the image sensor unit are input through the control unit, and the test register values for the image sensor unit selected according to an analysis result of the monitoring unit are input to the control unit. Method of measuring video signal of a camera module. The method of claim 15, wherein the selected register value of the test register of the image sensor unit is input to the controller. For the test of the image sensor unit according to a result of the monitoring unit analyzes any one or more of the characteristic values of the synchronization signal waveform, screen angle, luminance level, color saturation, color phase difference, RGB level, contrast, signal noise among the characteristic values of the analog signal Any one of the registers is selected, the image signal measuring method of the camera module.

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