JPS63158535A - Adjusting method for image pickup device for simulator - Google Patents

Abstract

PURPOSE:To display the same image as a finish print on a CRT, and also, to exactly and automatically execute a gain adjustment by bringing a reference negative to an image pickup by using an image pickup device, and adjusting the gain of an electric signal so that an output of the image pickup device corresponds to the photographic density of the reference negative. CONSTITUTION:By using an image pickup device 30 for resolving a light beam into three primary colors and outputting it as the corresponding electric signal, without providing a diaphragm mechanism, a color negative film 18 is illuminated by a light source system 10 which has been dimmed by an automatic exposure control function and a negative image recorded in a color negative film 18 is brought to an image pickup, and an output of the image pickup device 30 is converted and displayed as a positive image. The output of the image pickup device 30 is adjusted by bringing to an image pickup, a reference negative generated by developing an unexposed film, and a reference negative such as a reference negative provided with a part corresponding to a negative which has photographed yellow and green objects to be photographed, on the periphery of a part corresponding to a negative which has a grey object to be photographed, and adjusting the gain of the electric signal being the output of the image pickup device 30. In such a way, a reference of the output of the image pickup device 30 can be set exactly and automatically.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for adjusting a 1i image device for a simulator,
In particular, the present invention relates to a method of adjusting an imaging device used in a simulator that displays on a CRT an image identical to a finished print printed and processed on photographic paper by a color automatic photo printing device.

[Conventional technology]

Conventionally, the integrated transmission density (LATD) of the entire image of a color negative film is measured, density correction is performed, and slope control is performed to ensure that the density and color balance of all finished prints are the same as that of the negative (exposure amplifier, appropriate exposure, An automatic color photographic printing apparatus is known that prints and develops images to be identical regardless of overexposure. This automatic photo printing device consists of a light source, a light control filter, a mirror box,
It consists of an optical system equipped with a negative carrier and a black shack arranged in this order. Printing is performed by placing a color negative film on a negative carrier, turning on a light source, opening a black shutter, and forming an image of the color negative film on photographic paper. The printed photographic paper is configured such that the print is automatically completed by being developed by a development process. In this automatic photo printing device, the light that has passed through the negative film is detected by a light receiving element such as red light (R), green light (G), and blue light (B).
), the density is controlled using LATD based on Evans' theorem, and the color balance is controlled by performing slope control so that the slopes are the same for the three primary colors. Therefore, with this automatic photoprinting apparatus, all normally finished prints have the same density and color balance.

However, even if the main subject of a color negative film has an appropriate density, if the background is dark or light,
Since the exposure amount is controlled under the influence of this background density, density feria occurs.

Furthermore, when the color balance of the main subject is different from the color balance of the background, for example, when the color of the main subject and the color of the background are complementary colors, color feria occurs. Therefore, even if density correction and slope control are performed, the quality of the print may deteriorate. In this way, if the finished state of the print deteriorates, it becomes necessary to carry out printing and development again.

For this reason, conventionally, as shown in Japanese Patent Application Laid-Open No. 53-46731, a negative film image is taken with a TV camera and the T.
A so-called photo verification device is used, which adjusts a color video signal to obtain the desired density and color balance while displaying the image on a V screen, and uses this color video signal to print in an automatic photo printing device. There is.

In addition, as shown in Japanese Patent Publication No. 42-25220, there is also a system in which an image of a negative film printed on photographic paper is displayed on a TV screen, and an automatic exposure machine is linked with a resistor for adjusting the brightness and contrast of the TV. be. In this way, the frequency of reprinting and development processing is reduced.

[Problem that the invention seeks to solve]

However, in the method using a verification device, the light source of the verification device and the light source of the automatic photoprinting device are separate, so even if printing and development is performed using the automatic photoprinting device using the information obtained by the verification device, the light source is There is a problem in that the same image as the image displayed on the TV screen cannot be printed due to changes or the like.

Furthermore, when an automatic exposure machine is linked with the TV's brightness and contrast adjustment resistors, an appropriate image is simply displayed on the TV screen, even though the coloring characteristics of the TV and the coloring characteristics of photographic paper are different. However, the problem is that the same image that is printed is not displayed on the TV screen. In addition, traditionally, adjustments were made based on human senses, so
Not only is it impossible to accurately adjust the gain, but the adjustment itself is troublesome.

The present invention has been made to solve the above problems, and provides a method for adjusting an imaging device for a simulator that can display the same image as the finished print and also accurately and automatically adjust the gain. With the goal.

[Means for solving problems]

In order to achieve the above object, the first invention illuminates a color negative film with a light source system that is dimmed by an automatic exposure control function of an automatic photographic printer, and illuminates a negative image recorded on the color negative film with the received light beam. When adjusting an imaging device of a simulator that captures an image using an imaging device that separates the image into three primary colors and outputs them as electrical signals corresponding to the three primary colors, and converts the output of the ti imaging device and displays it as a positive image, the imaging device The present invention is characterized in that the reference negative is lifted or damaged using a 3D converter, and the gain of the electrical signal is adjusted so that the output of the imaging device corresponds to the density of the reference negative.

In addition, the second invention illuminates a color negative film with a light source system whose light is adjusted by the automatic exposure control function of an automatic photo printing device, and is equipped with an aperture mechanism that focuses the negative image recorded on the color negative film, and converts the received light beam into three primary colors. When adjusting an imaging device of a simulator that captures an image using an imaging device that separates into electric signals corresponding to the three primary colors and outputs them as electrical signals corresponding to the three primary colors, and converts the output of the imaging device and displays it as a positive image, the imaging device is used to The method is characterized in that a reference negative is imaged, and the gain of the electrical signal is adjusted so that the output of the imaging device corresponds to the density of the reference negative.

[Function] The simulator of the first invention uses an imaging device that does not have an aperture mechanism and separates the received light beam into three primary colors and outputs electrical signals corresponding to the three primary colors to perform automatic exposure control of an automatic photo printing device. A color negative film is illuminated with a light source system whose light is adjusted by the function to capture a negative image recorded on the color negative film, and the output of this imaging device is converted and displayed as a positive image. The output of this imaging device is a reference negative created by developing unexposed film (a so-called plain negative), or a negative with a yellowish-green subject photographed around the area corresponding to the negative with a gray subject. A reference negative such as a reference negative (so-called eyeball negative) having a corresponding portion is imaged, and the gain of the electrical signal that is the imager output is adjusted so that the imager output corresponds to the density of the reference negative. Ru.

For example, when the above-mentioned Snake negative is used as a reference negative, the gain of the electrical signals is adjusted so that all the levels of the electrical signals corresponding to the three primary colors are at the white level (or 90% of the white level). This basic negative has the highest light transmittance among all negatives, so the amount of light received by the imaging device is the largest, and the white level of the imaging device's output (maximum output ), it is possible to use a wide dynamic range of the imaging device. Also,
For example, when using a normal eyeball negative as a reference negative, this eyeball negative is imaged using an imaging device, and the gain of the electrical signal is adjusted so that each electrical signal corresponds to each density of the eyeball negative. Ru.

In this way, by adjusting the output of the imaging device so as to correspond to each of the densities of the eyeball negative, it is possible to determine the reference level of the camera output to be the same as the gray level.

Furthermore, when adjusting the output of the imaging device to correspond to the density of the reference negative as described above, it is preferable to adjust the gain of the electrical signal to adjust the brightness.

By adjusting the brightness in this way, the brightness standard can be determined. Furthermore, when adjusting the gain of the electrical signal as described above, the light source state of the automatic photo printing device is set to 4! If the image deviates from the quasi-state, it becomes necessary to electrically correct the deviation, so it is preferable to adjust the light source condition such that a negative colored in standard gray is finished as a standard gray print.

Further, the second invention uses an imaging device equipped with an aperture mechanism and adjusts the imaging device in the same manner as the first invention.

Since the imaging device of the present invention is equipped with an aperture mechanism, when the aperture is selected according to preference and is not used for adjustment, the first
The adjustment can be made by adjusting the gain of the electric signal as in the invention of the first invention, and when the diaphragm mechanism is used for adjustment, either only the diaphragm mechanism is adjusted as in the first invention, or
Alternatively, adjustment can be made by combining the adjustment of the aperture mechanism and the adjustment of the gain of the electrical signal, adjusting the brightness with the aperture and adjusting the density with the gain.

〔Effect of the invention〕

As explained above, according to the present invention, the diaphragm mechanism or the gain of the electrical signal is adjusted to correspond to the density of the reference negative, so it is possible to accurately and automatically set the reference for the output of the imaging device. You can get the effect that you can.

[Explanation of aspects]

In carrying out the present invention, the following embodiments may be adopted.

The first aspect is to image a blank negative using an imaging device that does not have an aperture mechanism, and adjust the gain of the electrical signal output from the imaging device to adjust the brightness and all of the output from the imaging device. The adjustment is made so that the value corresponds to the white level.

In the second aspect, an eyeball negative is imaged using an imaging device that does not have an aperture mechanism, and the gain of the electrical signal output from the imaging device is adjusted to adjust the brightness and all of the output from the imaging device is taken from the eyeball. It is adjusted to a predetermined level that is the same as the negative print finish.

The third aspect is to image a blank negative using an imaging device equipped with an aperture mechanism, and adjust the gain of the electrical signal output from the imaging device to adjust the brightness and all of the output from the imaging device. It is adjusted so that the value corresponds to the white level.

The fourth aspect is to image the eyeball negative using an imaging device equipped with an aperture mechanism, adjust the gain of the electrical signal output from the imaging device to adjust the brightness, and all of the output of the imaging device is set to the eyeball negative. It is adjusted to a predetermined level that is the same as the print finish.

In the fifth aspect, an image pickup device equipped with an aperture mechanism is used to image a blank negative, and the aperture mechanism is adjusted to adjust the brightness and all outputs of the image pickup device become values corresponding to the white level. It is to be adjusted accordingly.

The sixth aspect is to image the eyeball negative using an imaging device equipped with an aperture mechanism, adjust the aperture mechanism, adjust the brightness, and make the entire output of the imaging device the same as the print finish of the eyeball negative. It is adjusted to a predetermined level.

In the seventh aspect, an image pickup device equipped with an aperture mechanism is used to image a blank negative, and the aperture mechanism is adjusted to adjust the brightness, and all outputs of the image pickup device become values corresponding to the white level. This is to adjust the gain of the electrical signal output from the imaging device.

The eighth aspect is to image the eyeball negative using an imaging device equipped with an aperture mechanism, adjust the aperture mechanism to adjust the brightness, and set a predetermined setting so that all of the output of the imaging device is the same as the print finish of the eyeball negative. This is to adjust the gain of the electrical signal output from the imaging device so that the level is the same.

〔Example〕

A simulator to which the present invention is applicable will be described in detail below with reference to the drawings.

As shown in FIG. 1, on the back side of a light source 10 made up of a halogen lamp, there is a reflecting mirror 1 made up of a cold mirror.
2 is placed. A voltage of approximately 90% of the rated voltage is supplied to the light source 10 from a source device (ii), not shown, in order to prolong the life of the light source 10 and obtain a predetermined color temperature. On the light irradiation side of the light 'tA10, there are Y (yellow) and M filters each constructed by combining two temporary filters each having a sector shape of approximately 1/4 circle formed by a logarithmic curve and arranging them in pairs on the left and right. A light control filter 14 consisting of three complementary color filters (magenta) and C (cyan) and a mirror box 16 equipped with a scattering plate are arranged in order, and the light rays emitted from the light a10 are color-balanced by the light control filter 14. After the amount of light is adjusted, the light is converted into uniform diffused light by the mirror box 16, and the diffused light is irradiated onto the color negative film 18 held on the negative carrier. To adjust the above light source voltage, set each complementary color filter of the dimmer filter to the mechanical center, measure the light intensity with a luminometer, and adjust it to a constant light intensity ([1 exposure time]) to achieve the rated value. Approximately 90% of the voltage will be supplied! [11
ff. An optical system 20 and a black shutter 22 are arranged in this order on the side from which the transmitted light rays emerge from the color negative film 18. When the black shutter 22 is opened, the light rays transmitted through the color negative film 18 form an image on a photographic paper 24, thereby printing the photographic paper. configured to be exposed to light. After the exposed photographic paper 24 is processed in a development process 25,
It is referred to as print 27.

A drive circuit 26 is connected to the light control filter 14, and the drive circuit 26 moves each of the complementary color filters in a direction perpendicular to the optical axis, thereby making it possible to adjust the color balance and light amount. Further, a drive circuit 29 is connected to the black shutter 22 .

Near the optical system 2o side of the color negative film 1B, R
Equipped with three filters that transmit (red) light, G (green) light, and B (blue) light, respectively, and outputs R, G, and B signals.
A camera 30 configured with a plate camera and an image information detection device 32 equipped with a two-dimensional image sensor for detecting image density information of the three primary colors R, G, and B are arranged.

This two-dimensional image sensor is a CCD (charge coupled device)
It consists of Note that the camera 3o may be configured with a single CCD camera.

Here, in a normal TV system, the γ of the TV is said to be about 2.2, so the TV camera has a γ of r = 0.45.
A correction circuit is provided so that the overall value is γ-1, but since the T of normal photographic paper is about 2.0, in this embodiment, the simulator is used without providing a γ correction circuit in the camera 30. γ is set to approximately 1.

The camera 30 is connected to a simulator 34 via a gain control circuit 33, and the image information detection device 32 is connected to a slope control circuit 62 via a δ and γ correction circuit and a printing system density calculation circuit 40. It is connected. The printing system density calculation circuit 40 and the slope control circuit 62 perform the color balance and density correction described above. Further, a chromaticity meter 42 is arranged to face the screen of the CRT 345 constituting the simulator 34, and a chromaticity meter 44 is arranged to face the screen of the print 27. is connected to an I10 boat 46 that constitutes a computer. The computer has the above I10 port 46, CPU
4 B, read-on memory (ROM) 50, random access memory (RAM) 52, digital-analog (D
/A) It is configured to include a converter 54, analog-to-digital (A/D) converters 56 and 58, and buses 6o such as a data bus and a control bus that connect these, a gain control circuit 33, a simulator 34, δ, γ correction circuit 3
8. Connected to the slope control circuit 62 and drive circuit 26 connected to the printing system density calculation circuit 40,
It is connected to the drive circuit 29.

As shown in FIG. 2, the gain control circuit 33 is composed of an amplifier 331, an operational amplifier 332, a flip-flop 333, and resistors 334 to 336. A reference voltage (0.7Vl corresponding to the white level) is input.

The gain of the camera 3o is adjusted by the gain control circuit 33 as follows. First, a reference negative (a so-called blank negative) obtained by developing an unimaged film is set in a negative carrier so that the brightness is at the reference value. The reason for adjusting the brightness in this way is that the amount of light received by the camera 30 changes depending on changes in the negative size, etc. The gain of the amplifier 331 is controlled by outputting an analog signal from the D/A converter 54 for the camera output.

Since the output of the amplifier 331 is input to the operational amplifier 332, the operational amplifier 332 compares the reference voltage with the output of the amplifier 331, and outputs a signal via the flip-flop 333 when the output of the amplifier 331 matches the reference voltage. Then, when the signal is output from the flip-flop 333, the gain adjustment is stopped so that the camera output is adjusted to the white level. This allows you to adjust the color balance by matching the camera's white level when the base is negative (when the amount of light transmitted through the negative is maximum), allowing you to easily and accurately determine the brightness standard. can. Also, when adjusting the gain as described above,
Any one of the three primary color signals R, G, and B (for example,
After adjusting the brightness so that the level of the intermediate wavelength G signal becomes the white level, the remaining signals (for example, R and B signals)
This can be easily adjusted by adjusting the level so that it becomes the white level.

In addition, to adjust the color balance by adjusting the camera output using a normal eyeball negative, after controlling the brightness as described above to obtain the standard light amount, each of the three primary colors R, G, and B The gain is controlled as described above so that the camera outputs of the two cameras each have a predetermined value. Here, assuming that the normal eyeball negative has ideal spectral characteristics, the R, G, and B densities excluding the base portion of the negative are R = 0.26, G =
0.31, B=0.59, so if the base density of the negative is set to 90% of the white level (0.7V) of the camera for the three primary colors, the camera output of each of R, B, and G is R
The gain is controlled so that the voltage is 0.35V, G-0, 31V, and B-0, 16V. This causes each output of the camera to correspond to the density of the negative. Also, when using a normal eyeball negative, the brightness is adjusted in the same way as above so that the level of any one of the three primary color signals becomes a predetermined level, and then the level of the remaining signals is adjusted to a predetermined level. The gain can be easily controlled by controlling the gain.

In addition, the color balance position (camera output) of the camera after being adjusted as described above is memorized as a digital value.
If channels are created for each negative size (the amount of light changes because the magnification is different), switching can be performed by simply switching the channel each time the negative is changed. By doing this, even if the negative size changes, the color balance position of the camera can be changed simply by changing the channel. In the above case, if the light source deviates from the standard state, it will be necessary to electrically correct the deviation.
It is preferable to adjust the light source so that a standard gray negative produces a standard gray print.

As shown in FIG. 3, the δ and γ correction circuit 38 includes a signal processing circuit 60 that converts the R signal output from the image information detection device M32 into a density signal and performs δ and γ correction, and converts the G signal into a density signal. The signal processing circuit 62 includes a signal processing circuit 62 that converts the B signal into a density signal and performs δ and γ correction, and a signal processing circuit 64 that converts the B signal into a density signal and performs δ and γ correction. These signal processing circuits 60
．． 62 and 64 have the same configuration, so the signal processing circuit 60
will be explained only. The signal processing circuit 60 includes an offset correction circuit 601 and a logarithmic conversion circuit 6 for converting the density signal.
02, a δ correction circuit 603 and a γ correction circuit 604. The offset correction circuit 601 includes an operational amplifier OP3, resistors R6 and R7, and a variable power supply Bl. The δ correction circuit 603 includes an operational amplifier OP4, resistors R6 and R7, and a variable power supply B2. Then, the R, G, and B signals are corrected by δ and γ and output.

The above simulator 34 uses a logarithmic converter 341 connected to the output terminal of the gain control circuit 33 to match the density (integral density) seen from the spectral sensitivity of the camera with the density seen from the spectral sensitivity of the photographic paper. Matrix (cubic square matrix)
A circuit 342, an N/P inversion circuit 343 that inverts negative/positive (N/P) and converts it to the analytical density of photographic paper, and a luminance signal conversion circuit that converts the analytical density of photographic paper to the analytical brightness of the CRT phosphor. 344 and a CRT 345 that displays an image captured by the camera 30 by coloring a phosphor according to the output of the luminance signal conversion circuit 344 are connected in series.

Here, the value obtained by logarithmically converting each of the B, G, and R signals output from the camera 30 by the logarithmic conversion circuit 341, that is, the integrated density of the color negative film image seen from the light receiving spectral sensitivity of the camera, is calculated as B 79% G TV, When converted to a negative analytical density using a 3×3 matrix A-1 (where -1 indicates an inverse matrix) as Rtv, the following equation is obtained.

Further, when the color tone as viewed from the receiving spectral sensitivity of the photographic paper is converted to the analytical density of the negative using the 3×3 matrix B-' with the integrated density of the film image as BP and GF-RP, the following equation is obtained. − Analytical density of negative (BT,
, GTV, RPV) and (BP, GP, RP) are proportional, so they are expressed by the following equation (3) using a diagonal matrix α whose diagonal components are proportionality constants.

Therefore, using formulas (1) to (3) above, (B-1G;
By determining the relationship between RP) and CBtw, cyv, Ryv), the following equation (4) is obtained, which converts the density based on the spectral sensitivity of the TV to the density based on the spectral sensitivity of photographic paper.

Each component of the above-mentioned matrices B1α and A is determined in advance for a sample such as a reference negative, taking into account the color development characteristics of color negative film, the spectral sensitivity characteristics of photographic paper, and the spectral sensitivity characteristics of the camera, and the matrix shown below is 3×3. It is set in the matrix circuit 342.

The N/P inversion circuit 343 is a circuit that converts T to -T, and converts the output of the 3×3 matrix circuit 342 according to the following straight line and outputs the converted signal.

V )'+=a(X X+)...(6) However,
X+%)'+ is the coordinate value of the point that is not inverted in N/P (hereinafter referred to as the pivot point), x and y are the coordinate values when the density region is expressed in xy coordinates, and a is a constant and usually a negative value is selected. Ru.

As the pivot point, a point where the density should not change even if N/P is reversed, that is, a point at a neutral gray (standard gray) level is selected.

Cameras and CRTs display black levels to white levels in the range 0 to 0.7■, so when the camera output is logarithmically converted and N/P inverted, it exceeds the display range of the CRT, and for example, black Sometimes the level cannot be accurately reversed to the white level. Therefore, when inverting N/P, set the pivot point near 23% of the white level of the camera output V r n (density is 0.63 excluding the negative base) as the N/P inversion.
/P inversion is preferred.

FIG. 4 shows the camera output Vi when the camera output VI11 is inverted N/P with 23% of the white level of the camera output VI11 as the pivot point.
a and N/P inversion circuit 343 output■. , the relationship between . The white level of the camera is 0. Because it is TV,
23% of the white level would be 0.161V. Here, 3
When the output of the ×3 matrix circuit 342 is expressed as y = 3.2518 + 2ogVl11 (7), the coordinates corresponding to 23% of the white level are (0, 1
61, 2, 47), so (2, 47, 2, 4
7) Straight line y -2,47= a (x -2,47)...(8
), the curve expressed by the above equation (7) is converted to obtain the curve shown in FIG. 4, which is N/P inverted. As understood from FIG. 4, the value of 23% of the white level of the camera output remains unchanged even after the N/P inversion.

Furthermore, in order to perform N/P inversion, the N/P inversion circuit may be configured with the circuit shown in FIG. The circuit shown in the figure changes the reference voltage by moving the variable resistor R1 that sets the operational amplifiers OPI, O20, the operational amplifier reference voltages v, l, ■a (corresponding to the pivot point) and the contacts of the variable resistor R1. It is equipped with an actuating mechanism AC. A signal is input to the inverting input end of the operational amplifier OPI via a resistor R2, and a variable resistor R3 for adjusting the gain is connected between the inverting input end and the output end of the operational amplifier OP■. . Operational amplifier OP! The output terminal of is connected to the inverting input terminal of operational amplifier OP2 via resistor R4. A resistor R5 is connected between the inverting input terminal and the output terminal of the operational amplifier OP2. Variable resistor R1
One end is grounded, the other end is grounded via the voltage 1fIB, and the contacts of the variable resistor R1 are each connected to the non-inverting input terminal of the operational amplifier 0PiOP2.

A method for determining the pivot point using the above circuit will be explained. First, a color negative film colored in standard gray is held between negative carriers and imaged with a camera, and after N/P inversion is performed using the circuit shown in Figure 5, the 0-order image is displayed on a CRT screen.
A standard gray signal (which can be created electrically by setting the white level of the CRT to 23%) is displayed on the CRT screen in close proximity to the above-mentioned negative image. Then, by operating the cow board, the resistance value of the variable resistor R1 is continuously changed to change the reference voltages V, , V, and a standard gray signal is electrically created to create a negative image colored in standard gray. Match the image by.

This determines the pivot point.

By using the above circuit, it is possible to set the gray level according to the sense of the measurer, and since it is possible to set the gray level according to the sense of the measurer, it is possible to match the finished state of the print. The gray level can be set, and thereby a highly accurate simulation can be performed including conditions such as development conditions (fatigue of the developer, temperature change of the developer, etc.).

Color Given 1 Since a CRT displays an image using a light emitter, the brightness of the CRT is proportional to the voltage. However, since photographic paper uses an absorber (dye), the amount of dye and brightness are not proportional, but the amount of dye and the logarithm of brightness are proportional, and furthermore, changing the amount of dye changes the chromaticity point. Change. In other words, the pigments in photographic paper are unstable primary colors (the chromaticity point of which changes depending on the amount of pigment).
C, Y, M).

Therefore, the luminance signal conversion circuit 344 has N
The /P inversion circuit 343 output D is converted into an analytical luminance signal T and output to the CRT 345.

T-F C1o g-' (f (D)) )-(9)
However, " is a function that converts the output into an integrated density, and F is a function that converts the integrated transmittance log-' (D) into an analytical luminance signal.

The functions F and r are determined by determining the output D and the analytical luminance signal T to optimal values in advance, and performing optimization using the least squares method, regression, or the like. Note that a 3×3 matrix is generally used as the functions F and f.

Then, the CRT is controlled by the luminance signal obtained by the luminance signal conversion circuit 344 as described above, and the CRT is
An image that has the coloring characteristics of photographic paper and the coloring characteristics that are completely different from that of photographic paper is displayed on T.

In addition, although the example in which the brightness etc. are adjusted by adjusting the gain of the electrical signal using a camera not equipped with the aperture a side has been described above, the present invention is not limited to this, and the present invention is not limited to this. As described above, brightness and the like can be similarly adjusted by controlling the aperture mechanism to adjust the aperture or by adjusting the gain using a camera equipped with an aperture mechanism.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a circuit diagram showing an example of the gain control circuit shown in FIG. 1, and FIG.
A circuit diagram showing an example of the δ and γ correction circuit shown in Fig. 4.
A diagram for explaining P inversion, and FIG. 5 is another circuit diagram for performing N/P inversion. 14...Dimmer filter, 27...Print, 34...Simulator.

Claims (6)

[Claims] (1) A color negative film is illuminated with a light source system adjusted by the automatic exposure control function of an automatic photo printing device, and the negative image recorded on the color negative film is separated into the three primary colors by separating the received light beams and corresponding to the three primary colors. When adjusting an imaging device of a simulator that captures an image using an imaging device that outputs an electric signal as a positive image, and converts the output of the imaging device and displays it as a positive image, a reference negative is imaged using the imaging device, and the output of the imaging device is converted and displayed as a positive image. A method for adjusting an imaging device for a simulator, comprising adjusting the gain of the electrical signal so that the device output corresponds to the density of the reference negative. (2) Using a clear negative created by developing an unexposed film as the reference negative, capturing an image of the clear negative using the imaging device, adjusting the gain of the electrical signal, and adjusting the brightness; Claim (1), wherein all of the outputs of the imaging device are adjusted to a value corresponding to a white level.
A method for adjusting an imaging device for a simulator as described in . (3) Using an eyeball negative having a portion corresponding to a negative photographing a yellow-green subject around a portion corresponding to a negative photographing a gray subject as the reference negative, image the eyeball negative using the imaging device. The gain of the electrical signal is adjusted to adjust the brightness and all the outputs of the imaging device are adjusted to a predetermined level that is the same as the print finish of the eyeball negative. ) A method for adjusting an imaging device for a simulator as described in section 2. (4) A color negative film is illuminated with a light source system whose light is adjusted by the automatic exposure control function of an automatic photo printing device, and the negative image recorded on the color negative film is separated into three primary colors by an aperture mechanism. When adjusting an imaging device of a simulator that images using an imaging device that outputs electrical signals corresponding to the three primary colors and converts the output of the imaging device and displays it as a positive image, a reference negative is imaged using the imaging device. A method for adjusting an imaging device for a simulator, comprising adjusting the aperture mechanism or the gain of the electric signal so that the output of the imaging device corresponds to the density of the reference negative. (5) using a clear negative created by developing an unexposed film as the reference negative, capturing an image of the clear negative using the imaging device, and adjusting the aperture mechanism or the gain of the electrical signal; 5. The method of adjusting an imaging device for a simulator according to claim 4, wherein the brightness is adjusted and all of the outputs of the imaging device are adjusted to a value corresponding to a white level. (6) Using as the reference negative an eyeball negative having a portion corresponding to a negative photographing a yellow-green subject around a portion corresponding to a negative photographing a gray subject, image the eyeball negative using the imaging device. and adjusting the aperture mechanism or the gain of the electric signal to adjust the brightness and adjust the output of the imaging device to a predetermined level that is the same as the print finish of the eyeball negative. A method for adjusting an imaging device for a simulator according to scope (4).