JPH11355814A - Camera characteristics quantitating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and surely quantitate camera characteristics such as focus and gain. SOLUTION: A CCD camera 3 photographs a prescribed area of a guide rail 2 at a prescribed position, of which a tape 1 in a relative color (white) to that of the guide rail is stuck, and the prescribed area includes borders between the tape and the guide rail. An image processing circuit 4 converts a photographed signal into digital data, which are given to an arithmetic circuit 5. The arithmetic circuit 5 obtains the sum of density of the image data in a X-direction, obtains a slant of the orders based on the sum of density and obtains a width W of the borders, based on the obtained slant of the borders and provides an output of the arithmetic processing. When quantitating the characteristics, the operator adjusts a focus of the CCD camera 3 so as to obtain a relation of the border width W=1 so as to denote a matched focus, while viewing an image on a display screen based on the processing result from the arithmetic processing circuit. Thus, camera characteristics can be quantitated easily and surely without causing even slight deviations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera inspecting apparatus for inspecting a mounted state of an electronic component or the like mounted on a substrate by using a CCD camera or the like by imaging and displaying the image. The present invention relates to a camera characteristic quantifying device which quantifies the adjustment state of the focus and gain of a camera and can easily and reliably perform the adjustment.

[0002]

2. Description of the Related Art Generally, in a process of mounting an electronic component such as a resistor, a capacitor, or a semiconductor element on an electronic circuit board, for example, a component having a lead is inserted into a mounting hole of the circuit board by an automatic component insertion machine. And is mounted on the circuit board so as to be bent in a predetermined direction. On the other hand, an electronic component having only electrodes and no leads is mounted on a substrate to which an adhesive has been applied in advance corresponding to a wiring pattern by an automatic component mounting machine. Components mounted in this way will be mounted on the board by soldering, but before the soldering process, they are inspected using camera inspection equipment to verify that they are mounted correctly. .

In such a camera inspection device, a board on which components are mounted is imaged using a CCD camera or the like, supplied to a monitor as an image signal, and projected, and an operator looks at the monitor, and An inspection is performed to check whether the lead is mounted in the correct position and in the correct direction, and whether the bending direction of the lead is normal.

By the way, in consideration of such detection accuracy at the time of inspection, it is naturally desirable that the camera characteristics of the camera inspection equipment be as constant as possible. That is,
If the focus of the CCD camera fluctuates, or if the gain (the gain of the signal of the image pickup signal, the brightness at the time of displaying on the screen) fluctuates, high-precision inspection cannot be performed.

Normally, when using the above-described camera inspection apparatus, the focus and gain of the CCD camera are adjusted before the inspection is performed so that a predetermined inspection accuracy is obtained. It is a reality that an object is imaged with a CCD camera, and image data based on the obtained image signal is displayed on a monitor, and the operator actually performs the operation while looking at the monitor. Not limited.

As described above, in the prior art, since it is practically impossible to quantify the adjustment of the camera inspection equipment, there is a possibility that the inspection accuracy is adversely affected and a defective product is manufactured. Was.

[0007]

As described above, in the conventional camera inspection equipment, an image pickup signal of an object to be imaged is displayed on a monitor, and an operator adjusts focus and gain while looking at the monitor. As a result, there has been a problem that it is not always possible to adjust the state to a constant state, which adversely affects the inspection accuracy.

Accordingly, the present invention has been made in view of the above problems, and has as its object to provide a camera characteristic quantifying device capable of quantifying the adjustment of a camera inspection device.

[0009]

SUMMARY OF THE INVENTION A camera characteristic quantifying apparatus according to the present invention includes a focus adjusting means, which picks up an image of a predetermined area including a color boundary of an object having a relative color and outputs an image signal. Means, an image processing circuit for performing predetermined signal processing on an image pickup signal from the image pickup means and outputting the same as image data, and calculating an X-direction density addition value of the image data from the image processing circuit; And an arithmetic processing circuit for performing an arithmetic processing for obtaining the inclination and width of the boundary from the processing circuit and outputting a processing result, and a display unit for displaying a processing result output from the arithmetic processing circuit on a screen. It is a thing.

In the present invention, the imaging means is, for example, C
The CD camera, which is a CD camera, captures an image of an object having a relative color in a predetermined area including the color boundary, and outputs an imaging signal. The image processing circuit performs predetermined signal processing on an image pickup signal from the image pickup unit and outputs it as image data. The arithmetic processing circuit obtains a density addition value in the X direction of the image data from the image processing circuit, performs an arithmetic processing for obtaining the inclination and width of the boundary from the density addition value, and outputs a processing result. The display means displays a processing result of the arithmetic processing circuit on a screen. As a result, the focus can always be adjusted to be constant, and the camera characteristics can be quantified.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

1 and 3 show an embodiment of a camera characteristic quantifying device according to the present invention. FIG. 1 is a block diagram showing a schematic configuration of an entire system including the device, and FIG. FIG. 3 is a block diagram showing an example of a screen configuration at the time of adjustment by the device, and FIG. 3 is an explanatory diagram for explaining the operation of the device.

The camera characteristic quantifying device according to the present embodiment comprises:
As shown in FIG. 1, it is arranged and mounted at a predetermined position above a guide rail 2 used when an electronic circuit component is automatically inserted into a board by an automatic insertion machine.

The guide rail 2 is used in the process of automatically inserting electronic circuit components into the board by the automatic insertion machine as described above, and can be moved by itself in conjunction with a drive unit (not shown). It is configured. Therefore, as the guide rail 2 moves, the guide rail 2
An object placed on the upper part can be moved below the CCD camera 3.

The guide rail 2 is basically colored black, and is formed in a color suitable for adjusting camera characteristics such as focus performance and exposure performance.

In the present embodiment, an arbitrary comparison member 1 having a color relative to the color of the guide rail 2 is arranged at a predetermined position of the guide rail 2, and a boundary between the comparison member 1 and the guide rail 2 is provided. By imaging a predetermined range including the portion with the CCD camera 3 of the camera characteristic quantifying device,
While performing image processing based on the image pickup signal, the above CCD is viewed while viewing a display based on the image-processed image pickup signal.
The camera characteristics of the camera 3 are quantified.

As the comparison member 1, for example, a tape or the like which can be easily stuck on the guide rail 2 is used. Further, the tape 1 basically has a relative color to the color of the guide rail 2. White ones have been used.

FIG. 2 shows a specific block configuration of a camera characteristic quantifying apparatus for quantifying camera characteristics in this way.

As shown in FIG. 2, the camera characteristic quantifying device according to the present embodiment includes a CCD camera 3,
The camera 3 captures an image on the guide rail 2 including the comparison member 1 arranged at a predetermined position on the guide rail 2 shown in FIG.

The CCD camera 3 has a focus lens 3a and a zoom lens (not shown) as an image pickup optical system, and a light beam passes through these lenses to stop (not shown).
To form a subject image on a plurality of pixels as a solid-state imaging device.

The CCD camera 3 accumulates incident light by using these pixels, performs photoelectric conversion, and supplies the obtained image pickup signal to the image processing circuit 9.

When performing quantification, the focus lens 3a can be adjusted by the operator himself, and is controlled by a focus adjustment drive unit 7 described later. The adjustment can also be controlled automatically.

The image processing circuit 4 performs, for example, digital processing on the image pickup signal from the CCD camera 3 to convert it into digital image data, and further performs signal processing for display on a display unit such as a monitor. Is supplied to the arithmetic circuit 5.

The arithmetic processing circuit 5 obtains necessary data for performing quantification, which is a feature of the present embodiment, based on the supplied image data.

More specifically, in the arithmetic processing by the arithmetic processing circuit 5, a predetermined range on the guide rail 2 including the tape 1 is set as shown in FIG. An addition value of the density level (luminance level) of the image data in the tape direction (also referred to as the X direction) from the base end side where the tape 1 does not exist in the range is determined. In this case, the density values of the image processing range 8 where the arithmetic processing is performed are obtained by searching line by line in the X direction of the image processing range 8 shown in FIG. Obtain the density addition value.

Next, the maximum value and the minimum value of the obtained density addition value are obtained. In this case, the image data based on the captured image signal may include a noise component. That is, if dust such as dust adheres to the tape 1 or the guide rail 2, a slight density difference may occur. There is also.

Therefore, in the present embodiment, a value obtained by subtracting 30% from the maximum value of the density addition value (hereinafter referred to as th1) or more is defined as the density addition value of the tape 1 portion. A value equal to or more than the value obtained by subtracting% (hereinafter referred to as th2) is defined as the density addition value of the background portion, that is, the portion of the guide rail 2 where the tape 1 is not attached. The following th
A calculation formula for obtaining 1, th2 is shown. Note that the maximum value is max and the minimum value is min.

Th2 = max− (max−min) × 0.3 (Formula 1) th1 = min + (max−min) × 0.3 (Formula 2) In the arithmetic processing circuit 5, the above (Formula 1) The conditions are set in advance so that the density addition value can be obtained using Expression 2). Thereafter, as described above, the density addition value is obtained while the imaging is searched in the X direction, and the above Expression (1) is obtained. The calculated values th1 and th2 are obtained by Expression 2), and the calculated values t1 and th2 are further calculated.
The width of this boundary line is calculated based on h1 and th2 and the density addition value at the boundary portion between the tape 1 and the background portion of the guide rail 2.

More specifically, as shown in a display example based on the calculation result of the arithmetic circuit 5 in FIG. 3B, the arithmetic processing circuit 5 determines whether the calculated value th1 is greater than the boundary line exceeding the calculated value th2. The X coordinate values AX and BX of the intersection are obtained and are shown below (Equation 3).
, It is possible to determine the width W of the boundary line.

The width W of the boundary line W = BX−AX + 1 (Equation 3) That is, in the present embodiment, when the width W of the boundary line is 1, that is, when the relationship of BX = AX holds,
It is assumed that the focus of the CCD camera 3 is adjusted with high precision.

Accordingly, by supplying the calculation result (the output of the arithmetic circuit 5) including the above-mentioned calculation formulas 1 to 3 to the judgment display section 6, the focus performance of the CCD camera 3 is reduced as shown in FIG. Calculation formulas and calculated values th1 and t according to
h2, the X coordinate values AX and BX are always displayed, and when performing quantification, the operator directly looks at the display screen shown in FIG. By adjusting 3a, it is possible to perform the focus adjustment with a simple operation and reliably without any deviation or the like.

In the camera characteristic quantifying device according to the present embodiment, the arithmetic circuit 5 calculates the average density value of the image processing range 8 shown in FIG.
The exposure amount can also be adjusted based on this measurement value.

That is, if the minimum required amount of light from the light source cannot be obtained at the time of inspection by the CCD camera 3, the inspection accuracy is degraded due to the screen being dark or too bright, so that an optimal exposure amount is obtained. There is a need. For this reason,
When performing the quantification, an aperture (not shown) is once opened as a measure of whether or not a light amount in a range that does not affect the inspection accuracy is obtained. Whether or not the average density value in 8 is within an arbitrarily determined range is displayed.

For example, this display example is shown in FIG.
As shown in the table, the average density value = the sum of the density values / the area of the image processing range is displayed. Further, the calculation result (average density value) is L, and the range of the exposure amount which is not affected by the inspection accuracy is, for example, 100 to 1
If 20 is set, a display based on a calculation result such as 100 <average density value L <120 that can be recognized by the operator is displayed.

Accordingly, the operator can adjust the exposure of the CCD camera 3 so as to obtain the optimum exposure amount only by adjusting the aperture and the like of the CCD camera 3 while watching the display. In this case, if the displayed average density value is within a predetermined range at the time of this adjustment, it can be determined that the light amount required for the inspection is sufficiently obtained, and there is no need to change the light source or the like at the inspection site. On the other hand, if the average density value does not satisfy the above relationship, the operator once opens the aperture, and if the relationship still does not hold, the light amount required for the inspection is not obtained. , The light source, etc. may be changed to a new one. As a result, it is possible to quantify the exposure performance so that the exposure amount is optimally obtained.

Next, the operation of the camera quantification device at the time of quantification will be described with reference to FIG.

Now, it is assumed that the power of the apparatus is turned on in order to perform the quantification periodically performed before the inspection using the camera characteristic quantifying apparatus of the system shown in FIG. Then, CC
The D camera 3 drives the operation to take an image while searching for an image processing range 8 including a boundary portion between the tape 1 and the guide rail 2 in the X direction as shown in FIG. The signal is provided to the image processing circuit 9.

Thereafter, the image processing circuit 4 converts the image pickup signal from the CCD camera 3 into digital image data by performing, for example, digital processing, and further performs signal processing for displaying on a display unit such as a monitor. The supplied image data is supplied to the arithmetic circuit 5.

Thereafter, the arithmetic processing circuit 5 performs the arithmetic processing which is a feature of the present embodiment on the basis of the supplied image data, thereby forming the data on the guide rail 2 including the tape 1 as shown in the upper part of FIG. Are calculated from the maximum and minimum values of the density addition values, and after calculating the calculation values th1 and th2 by the above (Equations 1 and 2), the calculation value th1 and the calculation value th1 are calculated. The X coordinate values AX and BX of the intersection with the boundary line exceeding the value th2 are obtained, and the width W of the boundary line between the tape 1 and the background portion of the guide rail 2 is calculated by the above (Equation 3).

The calculation result of the arithmetic circuit 5 is supplied to the judgment display section 6 so that a screen such as a monitor displays the result shown in FIG.
The display shown in (b) is made.

Thereafter, the operator directly views the display corresponding to (Equation 3) shown in FIG. 3B, that is, the focus lens 3a while watching this display screen so that the width W of the boundary line becomes 1.
To adjust. This makes it possible to recognize even a slight shift that cannot be determined by human eyes, and it is possible to quantify the focus performance with a simple operation and reliably. For this reason, it is possible to improve the detection accuracy at the time of inspection in the automatic insertion step.

When the quantification of the exposure performance is also performed, the arithmetic circuit 5 calculates the density addition value shown in FIG.
By calculating the average density value of the image processing range 8 shown in (a) and supplying the measured value to the determination display unit 6, it is determined whether or not the average density value is within an arbitrarily determined range. The display (see FIG. 3B) is displayed.

Thereafter, the operator adjusts the aperture and the like of the CCD camera 3 while watching the display, and adjusts the exposure so as to obtain the optimum exposure. In this case, at the time of this adjustment, if the displayed average density value is within a predetermined range, it can be determined that the light amount required for the inspection is sufficiently obtained, and it is not necessary to change the light source or the like of the inspection place. On the other hand, if the average density value does not satisfy the above relationship, the operator once opens the aperture, and if the relationship still does not hold, the light amount required for the inspection is not obtained. , The light source, etc. may be changed to a new one.

Thus, the exposure performance can be easily and reliably quantified.

Therefore, according to the present embodiment, since the focus performance and the exposure performance can be quantified by a simple operation, it is possible to always obtain stable camera characteristics, and to improve the detection accuracy. Contribute.

In the present invention, it is also possible to perform the automatic focus adjustment based on the judgment result according to the calculation result by the arithmetic circuit 5 without performing the focus adjustment by the operator himself.

In order to carry out such an embodiment, FIG.
As shown in FIG. 1, a focus adjustment mechanism 7 for electrically controlling the adjustment by driving the focus lens 3a of the CCD camera 3 is provided. The calculation result from the arithmetic circuit 7 and the determination result from the determination display unit 6 are supplied to the focus adjustment mechanism unit 7.

The focus adjustment mechanism 7 is configured to be able to electrically drive the focus lens 3a of the CCD camera 3, the aperture (not shown), and the like. Based on the determination result from the display unit 6, the focus lens 3a is automatically driven and adjusted so that the width W of the boundary line becomes 1. Also, when quantifying the exposure performance, similarly, based on the determination result,
The drive (not shown) of the CCD camera 3 is driven and adjusted. At this time, if the exposure amount necessary for the inspection cannot be obtained, information indicating that the exposure amount cannot be obtained and the light source needs to be replaced is given from the focus adjustment mechanism unit 7 to a determination display on a monitor or the like, and the screen is displayed. Or the average density value may be blinked so that the operator can recognize that the exposure amount has not been obtained.

As a result, it is possible to reliably quantify the camera characteristics similarly to the above-described embodiment, and it is also possible to construct a system for automatically controlling the quantification work. Further, it greatly contributes to simplifying the quantification work.

In the embodiment according to the present invention,
Although the gain of the CCD camera 3 is adjusted by controlling the exposure amount by the aperture, the aperture may be a mechanical device or an electrical device, and further controls the exposure amount. It goes without saying that a means for adjusting the gain by processing the imaged signal itself can be applied. Further, the case where the quantification of the focus and the gain is performed by the operator himself or automatically based on the result of the image processing such as the arithmetic processing has been described. However, the present invention is not limited to this. The quantification mode may be selected and executed.

Further, when quantification is performed by an operator while looking at the display screen based on the image processing result, not only the display based on the image processing result but also a sound reproduction for reproducing a sound corresponding to the image processing result. Means may be provided so that the audio reproducing means reproduces the contents of the adjustment together with the display accompanying the quantification by voice so that the operator can recognize it. Thereby, erroneous operation at the time of quantification can be prevented.

[0052]

As described above, according to the present invention,
The camera focus shift and gain can be measured, and the camera characteristics can be adjusted based on the display based on the measurement result. As a result, it is possible to easily and reliably quantify camera characteristics such as focus and gain without causing a shift, and to obtain an effect that stable device performance can always be secured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a camera characteristic quantifying device according to the present invention, and showing a schematic configuration of an entire system.

FIG. 2 is a block diagram showing a specific configuration of a camera characteristic quantification device.

FIG. 3 is an explanatory diagram showing a display example of a display based on a calculation processing result of the device, and illustrating an operation.

[Explanation of symbols]

1 Comparative member (tape) 2 Guide rail 3 CC
D camera, 3a focus lens, 4 image processing circuit, 5 arithmetic circuit, 6 determination display section, 7 focus adjustment mechanism section, 8 image processing range.

Claims (13)

[Claims] 1. An image pickup device comprising: a focus adjustment unit; an image pickup unit for picking up an image of a predetermined area including a color boundary of an object having a relative color, and outputting an image pickup signal; Image processing means for performing processing and outputting as image data, obtaining an X-direction density addition value of the image data from the image processing means, and performing an arithmetic processing for obtaining the inclination and width of the boundary from the density addition value, A camera characteristic quantifying device comprising: an arithmetic processing unit that outputs a processing result; and a display unit that displays a processing result output from the arithmetic processing unit on a screen. 2. An image pickup device comprising: a gain adjustment unit; an image pickup unit for picking up an image of a predetermined region including a color boundary of an object having a relative color, and outputting an image pickup signal; Image processing means for performing processing and outputting as image data; calculating an X-direction density addition value of the image data from the image processing means; and performing an arithmetic processing for obtaining an average luminance of a captured object from the density addition value. , A processing unit that outputs a processing result, and a display unit that displays the processing result output from the processing unit on a screen. 3. An image pickup device comprising a focus adjustment unit and a gain adjustment unit, which picks up an image of a predetermined area including a color boundary of an object having a relative color and outputs an image pickup signal; and an image pickup signal from the image pickup unit. An image processing means for performing predetermined signal processing on the image data and outputting the image data as image data; and calculating a density addition value in the X direction of the image data from the image processing means. A camera comprising: an arithmetic processing unit that performs an arithmetic process for obtaining an average luminance of an object and outputs a processing result; and a display unit that displays a processing result output from the arithmetic processing unit on a screen. Property quantification device. 4. An image pickup device comprising: a focus adjustment unit; an image pickup unit for picking up an image of a predetermined area including a color boundary of an object having a relative color, and outputting an image pickup signal; Image processing means for performing processing and outputting as image data, obtaining an X-direction density addition value of the image data from the image processing means, and performing an arithmetic processing for obtaining the inclination and width of the boundary from the density addition value, A camera characteristic quantification device comprising: an arithmetic processing unit that outputs a processing result; and a control unit that controls the focus adjustment unit so that the processing result output from the arithmetic processing unit has a predetermined value. apparatus. 5. An image pickup device, comprising: a gain adjusting unit, for picking up an image of a predetermined area including a color boundary of an object having a relative color, and outputting an image pickup signal; Image processing means for performing processing and outputting as image data; calculating an X-direction density addition value of the image data from the image processing means; and performing an arithmetic processing for obtaining an average luminance of a captured object from the density addition value. A camera processing unit that outputs a processing result; and a control unit that controls the gain adjustment unit so that the processing result output from the calculation processing unit has a predetermined value. Device. 6. An image pickup device comprising a focus adjustment unit and a gain adjustment unit, which picks up an image of a predetermined area including a color boundary of an object having a relative color and outputs an image pickup signal, and an image pickup signal from the image pickup unit An image processing means for performing predetermined signal processing on the image data and outputting the image data as image data; and calculating a density addition value in the X direction of the image data from the image processing means. An arithmetic processing means for performing an arithmetic processing for obtaining an average luminance of the object and outputting a processing result; and controlling the focus adjusting means and the gain adjusting means so that the processing result output from the arithmetic processing means has a predetermined value. A camera characteristic quantifying device comprising: 7. A guide rail means having a surface having a predetermined first color for supporting, guiding, and transporting an object to be inspected, and a second color having a relative color relationship with the first color. A comparison object arranged at a predetermined position on the guide rail means; and a focus adjustment means, for imaging a predetermined area including a boundary between the guide rail means and the comparison object, and outputting an imaging signal. Means for performing predetermined signal processing on an image pickup signal from the image pickup means and outputting the same as image data; calculating an X-direction density addition value of the image data from the image processing means; And an arithmetic processing means for performing an arithmetic processing for obtaining the inclination and width of the boundary from and outputting a processing result; anda display means for displaying a processing result output from the arithmetic processing means on a screen. Camera characteristics Quantifier. 8. A guide rail means having a surface having a predetermined first color for supporting, guiding, and transporting an object to be inspected, and a second color having a relative color relationship with the first color. A comparison object arranged at a predetermined position on the guide rail means, and a gain adjustment means, for imaging a predetermined area including a boundary between the guide rail means and the comparison object, and outputting an imaging signal Means for performing predetermined signal processing on an image pickup signal from the image pickup means and outputting the same as image data; calculating an X-direction density addition value of the image data from the image processing means; A calculation processing means for performing a calculation processing for calculating an average luminance of an object imaged from the apparatus, and outputting a processing result; and a display means for displaying a processing result output from the calculation processing means on a screen. Camera characteristics Quantifier. 9. A guide rail means having a surface having a predetermined first color for supporting, guiding, and transporting an object to be inspected, and a second color having a relative color relationship with the first color. A comparison object arranged at a predetermined position on the guide rail means; and a focus adjustment means, for imaging a predetermined area including a boundary between the guide rail means and the comparison object, and outputting an imaging signal. Means for performing predetermined signal processing on an image pickup signal from the image pickup means and outputting the same as image data; calculating an X-direction density addition value of the image data from the image processing means; An arithmetic processing means for performing an arithmetic processing for obtaining the inclination and width of the boundary from the data, and outputting a processing result; and a control for controlling the focus adjusting means such that the processing result output from the arithmetic processing means has a predetermined value. means The camera characteristic quantification apparatus which is configured by including the. 10. A guide rail means having a surface having a predetermined first color for supporting, guiding, and transporting an object to be inspected, and a second color having a relative color relationship to the first color. A comparison object arranged at a predetermined position on the guide rail means, and a gain adjustment means, for imaging a predetermined area including a boundary between the guide rail means and the comparison object, and outputting an imaging signal Means for performing predetermined signal processing on an image pickup signal from the image pickup means and outputting the same as image data; calculating an X-direction density addition value of the image data from the image processing means; An arithmetic processing unit for calculating an average luminance of the object imaged from the above, and an arithmetic processing unit for outputting a processing result; and controlling the gain adjusting unit such that the processing result output from the arithmetic processing unit becomes a predetermined value. Control means The camera characteristic quantification apparatus which is configured by including the. 11. The arithmetic processing means outputs display data indicating an inclination of the boundary line as an analog amount from the density addition value, and displays display data indicating a width of the boundary line as a numerical value from the density addition value. 8. The camera characteristic quantifying device according to claim 1, wherein the camera characteristic is quantified. 12. The image processing apparatus according to claim 2, wherein the arithmetic processing means calculates average brightness of the imaged object from the density addition value and outputs display data indicating the average brightness. 9. The camera characteristic quantification device according to any one of claims 8 and 9. 13. The method according to claim 1, wherein the arithmetic processing means calculates the width of the boundary line based on two predetermined points between a maximum value and a minimum value of the density addition value. The camera characteristic quantification device according to any one of 3, 4, 6, 7, and 9.