JPH03136026A - Camera and method for recording color temperature information - Google Patents

Abstract

PURPOSE:To reproduce the color of an object at the time of photographing on a photographic paper with high fidelity by measuring and encoding the color temperature of a light source which illuminates the object and recording the code of the color temperature in an area other than a photographing area where the object is recorded out of the recording area of a photographic film. CONSTITUTION:The camera is provided with a color temperature measuring means 25 for measuring the color temperature of the light source which illuminates the object, an encoding means 23 for encoding the measured color temperature, and a recording means 26 for recording the obtained code of color temperature in the area other than the photographing area where the object is recorded out of the recording area of the photographic film as soon as the object is photographed. Therefore, printing processing is performed by referring to the code of the color temperature which is recorded on the film in the case of printing the image of the object recorded on the film on a photographic paper. Thus, the color of the object at the time of photographing is reproduced on the photographic paper with high fidelity without necessitating the usage of a photographic paper for monitor and printing and development processing for monitor.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a color temperature information recording camera that records information regarding the color temperature of a light source illuminating the subject on a photographic film at the same time that the subject is photographed. and a color temperature information recording method.

[Conventional technology]

In the photographic industry, one of the challenges has traditionally been to match the color of the subject at the time of photographing with a high degree of fidelity to the color of the subject reproduced on photographic paper. In order to solve this problem, color charts have been used as color standards. That is, a color patch is placed at the same location as the subject, the subject and the color patch are photographed together, and the image is imprinted onto a photographing area of a silver halide film (hereinafter simply referred to as "film").

After the film is developed, exposure conditions for the photographic paper and/or print development conditions are adjusted so that the color of the color patch reproduced on the photographic paper matches the original color.

That is, images recorded on a film are exposed under mutually different exposure conditions A, B, and C, as shown in FIG. 12, for example.
After printing on monitor photographic paper IA, IB, IC, etc. under..., these are developed under -specific print development conditions a to reproduce the subject image and color patch image, respectively. . In this way, each monitor's photographic paper IA, IB
, IC... The colors of the convex images reproduced on the images differ slightly due to the different exposure conditions. Next, the colors of the color patches 3A, 3B, 3C, . . . reproduced on these monitor photographic papers IA, IB, IC, . . . are compared with the colors of the actual color patches. And the above photographic paper IA, IB, I
It is determined which of C... the color of the color patch image reproduced on the photographic paper matches or is closest to the color of the actual color chart. As a result of the above judgment, for example, if photographic paper IB is used, exposure condition B and print development condition a are the optimal conditions for color reproduction, and if the subject is reproduced on photographic paper under these conditions, high fidelity can be achieved. It is possible to reproduce the color of the subject with a degree of accuracy. Therefore, under these conditions (exposure condition B and print development condition a), after the image (subject and color patch) imprinted on the film was reproduced on the actual photographic paper, the color patch was finally reproduced. Cut off the parts to create the desired print.

[Problem to be solved by the invention]

In the above method, it is necessary to record the color chart onto the film at the same time as photographing the subject. For example, when the subject is far away from the photographer, such as when photographing a distant landscape, The following problems arise. That is, in the above case, the color chart cannot be placed at the same position as the subject, but must be placed near the photographer. Therefore, for example, if the weather near the subject is cloudy but it is sunny near the color chart (near the photographer), the light source that illuminates the subject and the light source that illuminates the color chart may be substantially different. It becomes something. After photographing and recording the subject and color chart on film in this state, even if the exposure conditions and print development conditions are determined using the above method, these conditions must be such that the colors of the color chart can be reproduced with high fidelity. There it is,
This is not a condition for faithfully reproducing the colors of the subject. Therefore,
A problem arises in that the colors of the subject cannot be faithfully reproduced on photographic paper.

In addition, in the above method, monitor photographic paper IA, IB, IC
It is necessary to prepare ..., develop prints for monitors, etc. Therefore, there is a problem in that extra labor and materials are required just to determine exposure conditions and print development conditions.

Therefore, one possible method to solve the above problem is to have the photographer measure the color temperature of the light source that illuminates the subject, instead of using a color chart, and determine the above conditions based on the measurement results. However, measuring and recording the color temperature of a light source every time a subject is photographed becomes a very troublesome task for the photographer. Additionally, since the color temperature of the light source illuminating the subject may change from moment to moment, it is desirable to measure the color temperature of the light source at the same time as shooting the subject. It is virtually impossible to take temperature measurements at the same time.

This invention was made to solve the above problems, and it is possible to record the color temperature information of the light source illuminating the subject simultaneously and automatically at the same time as the subject is photographed. To provide a color temperature information recording camera and a color temperature information recording method that can reproduce the color of an object at the time of photography with high fidelity on photographic paper without using photographic paper or developing monitor prints. The purpose is to

[Means to solve the problem]

A color temperature information recording camera according to the present invention includes a color temperature measuring means for measuring the color temperature of a light source illuminating a subject;
Coding means for coding the color temperature measured by the color temperature measuring means, and a color temperature code obtained by the coding means, simultaneously capturing the subject in the recording area of the photographic film. A recording means for recording in an area other than the photographing area to be recorded is provided.

Further, the color temperature information recording method according to the present invention includes a first step of measuring the intensity of light components of a plurality of wavelengths included in the light of a light source illuminating a subject; A second step of determining the color temperature of the light source from the intensity of the light component and further determining a color temperature code corresponding to the color temperature; The method includes a third step of recording in an area other than the photographing area in which the subject is recorded.

[Effect]

According to this color temperature information recording camera and color temperature information recording method, after the color temperature of a light source illuminating a subject is measured, a color temperature code corresponding to the color temperature is determined. Further, the color temperature code is recorded in a recording area of the photographic film other than the photographing area in which the subject is recorded. Therefore, when printing an image of a subject recorded on a film onto photographic paper, the printing process can be performed with reference to the color temperature code recorded on the film.

〔Example〕

1 and 2 are a front view and a rear view, respectively, showing an embodiment of a color temperature information recording camera according to the present invention, and FIG. 3 is an enlarged view of part A in FIG. 2. As shown in FIG. 1, a photographic lens 12 is built into the center of the body 11 of this camera 10, and when the shutter switch 13 is pressed, light enters the camera body 11 through the photographic lens 12. The light is guided to the surface of the film F (FIG. 2) by optical means (not shown).

Further, an exposure sensor 14 is located below the photographic lens 12.
and a color temperature sensor 15 are provided, respectively. On the other hand, an autofocus sensor 16. is located above the photographic lens 12. A finder 17° and a strobe 18 are provided respectively.

FIG. 2 shows a state in which the film F is set in the camera 1o. In the figure, a cartridge 19 that winds up an unshot film is fitted into one end of the camera body 11, and the film F pulled out from the cartridge 19 is placed on a spool 20 provided at the other end of the camera body 11. It's rolled up. Further, as can be seen from FIG. 3, an LED array 2 consisting of eight LEDs 22a to 22h corresponds to the surface of the upper side band of the film F.
2 is placed.

FIG. 4 is a block diagram of the camera 10. In the figure, a microcomputer (hereinafter referred to as "microcomputer") 23 built into the camera body 11 is a CPU.
23a and a memory 23b, and is electrically connected to each section described below.

The exposure control unit 24 includes the exposure sensor 14, and outputs the illuminance of the light source that illuminates the subject detected by the exposure sensor 14 to the microcomputer 23 as a digital signal By, and also outputs the shutter speed Tv and aperture calculated by the microcomputer 23. shutter speed based on the value Ay,
It is configured to control the aperture value.

The color temperature measurement unit 25 includes the color temperature sensor 15, and the light intensity of the red (R), green (G), and blue (B) components of the light from the light source that illuminates the subject is measured by the color temperature sensor 5. microcomputer 23 as digital signals V, vG, and VB.
Output to, do. FIG. 5 is a circuit diagram of the color temperature measurement section 25. As shown in the figure, in the color temperature sensor 5, photodiodes 52R, 52G, and 52B are provided corresponding to a red color filter member 51R, a green color filter member 51G, and a blue color filter member 51B, respectively.

The light from the light source that illuminates the subject is passed through the color filter member 5
Photodiode 52 via 1R, 51G, 51B
The photodiodes 52R, 52G, and 52B are incident on the photodiodes 52R, 52G, and 52B, respectively, and photoelectrically converted by the photodiodes 52R, 52G, and 52B to generate a photocurrent.
The cathode and anode of are connected to the non-inverting long terminal (+) and the inverting input terminal (-) of the operational amplifier 53, respectively.

The operational amplifier 53 used has an impedance characteristic with sufficiently high manual impedance so that the input bias current is sufficiently small with respect to the photocurrent.

A diode 54 is connected between the output terminal and the inverting input terminal of the operational amplifier 53 for logarithmically compressing the photocurrent and converting it into a voltage.
are connected to each other. Further, a constant voltage source 55 for setting a reference voltage when logarithmically compressing the photocurrent is connected to the non-inverting input terminal (+) of the operational amplifier 53, and the output terminal of the operational amplifier 53 are connected to temperature compensation circuits 56R, 56G, and 56B, and each diode 54 provides a logarithmically compressed voltage. Also,
A/D conversion circuits 57R, 57G, 57B are connected to the output terminals of the temperature compensation circuits 56R, 56G, 56B,
Analog voltages temperature-compensated by temperature compensation circuits 56R, 56G, and 56B are applied to A/D conversion circuits 57R and 5, respectively.
7G and 57B, the signals are converted into digital signals v, VG, and VB corresponding to each voltage value, and are applied to the microcomputer 23. In the microcomputer 23, the digital signals V, Vc
, VB (details will be described later), and outputs the color temperature code to the color temperature code imprinting section 26.

This color temperature code imprinting section 26 is a part of the LED array 22.
(FIG. 3), a signal related to the color temperature code given from the microcomputer 23, and a film sensitivity signal detected by the film sensitivity detection section 27
2h, and a driver circuit (not shown) that controls each of the 2h. Note that the film sensitivity detection section 27
A film sensitivity signal that is the ISO sensitivity of the film F detected by is also output to the microcomputer 23.

The autofocus mechanism unit 28 includes the autofocus sensor 16, measures the distance between the camera 10 and the subject in response to a command signal from the microcomputer 23, and controls the photographic lens 12 according to the distance. It is configured.

The winding motor control section 29 is connected to the microcomputer 23 and is configured to control the winding motor M that winds the film F in response to command signals from the microcomputer 23.

The date module 30 is equipped with a timekeeping function, displays the date, etc. on an external display LCD (not shown), and outputs a signal regarding the date, etc. to the date imprinting section 31 to record the date and time of the photographing area 21 of the film F. Record the date etc. in a part.

The microcomputer 23 further includes the shutter switch 1.
3 is connected, and the shutter switch 13 is 0N10.
The shutter opening/closing signal is sent to the shutter control unit 3 according to the FP state.
2 to control opening and closing of a shutter (not shown).

In addition to the above, the microcomputer 23 also controls a switch group 33 for setting the shutter speed and aperture value, and a film F.
Sensor group 34 for detecting the presence/absence of etc. A display section 35, a strobe light 18, etc., which inform the photographer of various information, are also connected.

Next, the operation of the color temperature information recording camera configured as described above will be explained with reference to FIG. When the photographer turns on the power switch (not shown) attached to the camera body 11, the microcomputer 23 turns on the sensor group 3.
Based on the signal from No. 3, it is determined whether the photographing is possible (step Sl). When it is determined in step S1 that the camera is not in a state where photography is possible, what kind of processing the photographer must perform is displayed on the external display LCD (step S2). On the other hand, if it is determined that the shooting is possible, a start signal is output from the microcomputer 23 to the autofocus mechanism section 28, and the distance between the camera 10 and the subject is measured and the shooting lens 12 is focused. (step 83).

Further, the microcomputer 23 determines whether the shutter speed, aperture value, etc. have been set by the photographer (step S4), and only if these have not been set, automatic exposure processing is performed (step 85). That is, an automatic exposure signal is given from the microcomputer 23 to the exposure control section 24, and in response to this, the exposure sensor 14 of the exposure control section 24 measures the illuminance of the light source illuminating the subject, and the measurement result By is given to the microcomputer 23. It will be done. And that value By
The optimum shirt size bead T and aperture value A are set based on the film sensitivity signal given from the film sensitivity detection section 27.

■ When the above settings are completed and the photographer presses the shutter switch 13 (step S6), a command to open the shutter is output from the microcomputer 23 to the shutter control unit 32, and the shutter speed is set at the predetermined shutter speed. The shutter opens and closes. In this way, only while the shutter is open, light is incident on the surface of the film F through the photographic lens 12° optical means, and the image of the subject is recorded by exposure in the photographing area 21 of the film F (step S7).

At the same time, the microcomputer 23 outputs digital signals V 1 , V 2 ,
A color temperature code corresponding to the color temperature of the light source is determined based on
The shooting area 21 of the recording area of film F is given to
The color temperature code is printed in an area other than the area corresponding to (FIG. 3) (step S8).

Note that the details will be explained later.

When the above photographic recording is completed, a winding command is given from the microcomputer 23 to the winding motor control section 29, and the film F
is wound up by one frame (step S9), and the above series of processes (steps 81 to S8) are repeated again.

Next, the operation of the color temperature sensor 15 and the above step S8
will be explained in more detail. The light emitted from the light source illuminating the subject is transmitted to the color temperature sensor 1 shown in FIG.
The light is incident on each of the color filter members 51R, 51G, and 51B. The light from the light source that has passed through the red color filter member 51R is incident on the photodiode 52R, and the photodiode 52R photoelectrically converts the incident light to generate a photocurrent. That is, a photocurrent flows from the positive electrode of the constant voltage source 55 to the output side of the operational amplifier 53 via the photodiode 52R and the diode 54. Since the operational amplifier 53 is subjected to negative feedback by the diode 54, as a result, the potential difference between the non-inverting input (+) and the inverting input (-) of the operational amplifier 53 becomes zero. Therefore, a voltage corresponding to the voltage drop caused by the photocurrent flowing through the diode 54 is applied to the temperature compensation circuit 5 via the output terminal.
Output to 6R. Furthermore, the voltage is the temperature compensation circuit 5
After the temperature is corrected by 6R, the signal is converted into a digital signal VR by an A/D conversion circuit 57H. Similarly, the voltage obtained by logarithmically compressing the current generated by the light transmitted through the green color filter member 51G is the temperature compensation circuit 56G.
After temperature correction, the A/D conversion circuit 57G
is converted into a digital signal Vc. Furthermore, the light transmitted through the blue color filter member 51B is also converted into a digital signal Vo corresponding to the light intensity in the same manner as described above. In this way, the light intensities of the red, green, and blue components of the light from the light source are detected, and digital signals V 1 , V 2 , and V 2 corresponding to these light intensities are output.

GB FIG. 7 is a flowchart showing the color temperature code imprinting operation. When photographing and recording of the subject is executed (step S7), a measurement command is given to the color temperature measuring section 25 (step 581), and information regarding the color temperature of the light source (digital signals V 1 , V 2 , GB) is taken into the microcomputer 23. Note that the above information may continue to be output to the microcomputer 23 at the same time as the power switch of the camera 10 is turned on.

Next, the microcomputer 23 calculates the ratio of the digital signal V, (voltage value related to the light intensity of the green light) to the digital signal vR (voltage value related to the light intensity of the red light), and then The value P is determined by rounding off the value to the second decimal place (step 582). Similarly, the value P is obtained from the digital signal v, GB
RIG (step 883).

In the memory 23b, as shown in FIG. 8, 8-bit RIG corresponding to the respective values P and P are stored.
RIG Color temperature code D (P , P ) is recorded and R
IG RIG is here. Then, as described above, the value PR/G'PB/G
is obtained, the color temperature code D corresponding to that value is
It is read out as a color temperature code corresponding to the color temperature of the light source illuminating the subject (step 584). For example, the value P
, P are "0.9" and "1.1°, respectively, the color temperature code "1110011" recorded in the shaded area in FIG.
0'' is read from memory 23b.

Next, a signal related to the color temperature code is given to the color temperature code imprinting section 26, and based on the color temperature code and the film sensitivity signal given from the film sensitivity detection section 27, only the predetermined LED of the film F is activated. It is turned on with appropriate light emission energy according to the ISO sensitivity (step 585).

For example, if the color temperature code "1110a" is set as above,
When tto° is read out from the memory 23b and given to the color temperature code imprinting section 26, the LEDs 22a and 2
2b, 22c, 22f, 22g are lit with predetermined luminous energy, and the LEDs 22a, 22b, 22c,
The areas of the film F corresponding to 22f and 22g are exposed, and the color temperature code "11100110" is recorded on the film F at the same time as the subject is photographed (FIG. 9). In the above, the color temperature code is recorded on the film F as an 8-bit binary code, but the color temperature code is not limited to this. Alternatively, the image may be recorded on the film F.

As described above, at the same time that the shooting of the subject is recorded on the film F, information regarding the color temperature of the light source illuminating the subject, that is, the color temperature code D, is added to the side band of the film F in one-to-one correspondence with the subject. automatically recorded in the section.

In addition, in the above embodiment, each LED 2 as shown in FIG.
2. Although the LEDs 22° to 22h are arranged in a line corresponding to the side strips of the film F, the mounting positions of the LEDs 22° to 22h are not limited to this, and are located in the shooting area 21 of the recording area of the film F. Any position corresponding to an area other than the above may be used. For example, as shown in FIG.
.

It is placed at a position corresponding to the lower sprocket 37b, and 4 bits of the color temperature code are recorded between the upper sprocket 37a, and the remaining 4 bits are recorded between the lower sprocket 37a.
It may be recorded between 7b. Further, an LED 1 may be arranged to record a color temperature code between the photographing area 21 and the next photographing area 21' (FIG. 10).

In addition, in the above embodiment, in order to measure the color temperature of the light source illuminating the subject, red (R) and green (G) of the light from the light source are measured.
), I am looking for the light intensity of the blue (B) component, but these red,
Cyan (C), yellow (Y), instead of green and blue components,
The light intensity of the magenta (M) component may be determined, and a color temperature code corresponding to the color temperature of the light source may be determined based on this color temperature information.

FIG. 11 is a schematic diagram of an exposure device 80 that prints a subject image photographed on a film F onto photographic paper based on the color temperature code recorded by the camera 10. The exposure device 80 has an ellipse l! 81, and a white light source 82 such as a halogen lamp placed at one focal position of the elliptical mirror 81, and the white light L1 emitted from this light source 82 is reflected by the elliptical mirror 82 to the other focal position. It is configured to focus light on the At the other focal position of the elliptical mirror 81, there are three red, green, and blue color filters 83R, 8 for adjusting the Q chromaticity.
3G and 83B are arranged in this order in the irradiation direction of the white light L1. Each color filter 83R, 83G, 83B
As shown in FIG. 11, the thickness thereof changes continuously in the width direction, and is movable in the direction perpendicular to the OB irradiation direction of the white light L1 by drive motors M, M, and M. It is being

Further, the exposure device 80 is provided with a condenser lens 84 . This condenser lens 84 is arranged so that its front focal position coincides with the other focal position of the elliptical mirror 81, and each of the color filters 83R, 83G, 8
It has the function of converting the light L that has passed through 3B into parallel light L3.

This parallel light L3 is irradiated onto the surface of the photographing area of the developed film F, and the light L4 transmitted through the film F is guided to the surface of the photographic paper 86 via the enlarging lens 85, and the subject image on the film F is displayed on the photographic paper 86. Exposure is magnified to .

The exposure device 80 is also provided with a sensor 87 for reading a color temperature code. This color temperature code reading sensor 87 is composed of eight sets of light emitting/receiving parts, and each light emitting/receiving part is located at an upstream position with respect to the feeding direction of the film F.
It is provided so that the color temperature code recorded on the film F can be read.

The color temperature code signal output from the color temperature code reading sensor 87 is given to a control section 88 consisting of a CPU and memory. The control unit 88 calculates the optimal position of each color filter 83R183G, 83B based on the read code, and provides the position command to the motor driver 89. When this position command is given, an appropriate signal is given from the motor driver 89 to each drive motor M 1Mc and MB in order to move each color filter 83R, 83G, 83B by an amount corresponding to the position command. The control section 88 has not only the above functions but also a function of controlling the entire exposure device 80 and printing the subject image of the film F onto the photographic paper 86 (described in detail later).

Next, a color lab technique for film F photographed and recorded by the color temperature information recording camera will be described.

First, the photographed and recorded film F is developed under film development conditions corresponding to the characteristics of the film F. Then, using the exposure device 8o shown in FIG. 11, the subject image photographed on the film F is exposed onto the photographic paper 86 in the following procedure. That is, when the developed film F is set in a predetermined position of the exposure device 80 and the photographic paper 86 is also set in a predetermined position, when the start switch is pressed, light is emitted from each light emitting part of the color temperature code reading sensor 87. The light of film F
irradiated onto the surface. Since this film F is a negative film, for example, if "11100110" is recorded on the side band of the film F as a color temperature code, the fourth .
The fifth and eighth light receiving sections receive the light transmitted through the negative film F, while the other light receiving sections do not receive the light. As a result, a signal corresponding to the color temperature code recorded on the film F is given to the control section 88. Note that this signal is temporarily recorded in the memory of the control unit 88.

Next, a drive command is given from the control section 88 to a film winding motor (not shown), and the motor is driven to move the film F to the left by one frame. In this way, the photographing area corresponding to the color temperature code read as described above is positioned directly below the light source 82.

Subsequently, the color temperature code recorded in the memory of the control unit 88 is read out, and based on the code, the CPU of the control unit 88 selects each of the color filters 83R, 83G,
The optimum position of 83B is calculated. Then, the position command is given from the control section 88 to the motor driver 89, and each color filter 83R1G, 33G, 83B is moved by an appropriate amount in the left and right direction by each drive motor M, M2, MB.

In this way, the spectral characteristics of the light L2 are adjusted so that the color temperature of the light L2 matches that of the light source that illuminated the subject.

Further, the light L2 becomes parallel light L3 by a condenser lens 84, and the negative film F is turned into parallel light L3 by an enlarging lens 85.
The light is irradiated onto the photographic paper 86 through the rays, and an inverted image of the subject image on the negative film F is printed.

In addition, at the same time as the above baking, the color temperature reading sensor 8
7, the color temperature code of the photographing area to be printed next is read, and the code is recorded in the memory of the reconnaissance section 88.

Once the printing is completed, the print is developed under certain conditions that match the characteristics of the photographic paper, and a photograph with the subject image printed on it is completed.

As described above, according to the color temperature information recording camera 10 according to this embodiment, the color temperature measuring unit 25 measures the color temperature of the light source illuminating the subject, and the measured color temperature is encoded. Since the image is recorded in one-to-one correspondence with the photographic area photographed on film F, the color temperature of the light source used for exposure is matched to the color temperature of the light source that illuminated the subject when printing the image of the subject onto the photographic paper. Can be easily matched. Therefore, the colors of the subject can be easily reproduced with high fidelity.

〔Effect of the invention〕

According to the color temperature information recording camera and color temperature information recording method of the present invention, the color temperature of the light source illuminating the subject is measured and coded, and the color temperature code is recorded in the recording area of the photographic film. Since the recording is made in an area other than the shooting area where the subject is being photographed, at the same time as shooting the subject,
Moreover, the color temperature information of the light source can be automatically recorded in one-to-one correspondence with the photographing area. As a result,
It becomes possible to reproduce the color of a subject at the time of photographing with high fidelity on photographic paper without using photographic paper for monitors or developing processing for monitors.

[Brief explanation of the drawing]

1 and 2 are a front view and a rear view, respectively, showing an embodiment of a color temperature information recording camera according to the present invention, FIG. 3 is a partially enlarged view of FIG. 2, and FIG. 4 is a partial enlarged view of FIG. 1. and the second
5 is a circuit diagram of the color temperature measuring section, FIG. 6 is a flow chart showing the operation of the camera shown in FIGS. 1 and 2, and FIG. 7 is a block diagram of the color temperature measuring section. A flowchart showing the operation, FIG. 8 and FIG. 9 are both explanatory diagrams for explaining the color temperature code recording method.
FIG. 0 is a rear view showing another embodiment of the color temperature information recording camera according to the present invention, FIG. 11 is a schematic configuration diagram of an exposure device,
FIG. 12 is an explanatory diagram showing a conventional photo reproduction method. In the figure, 23 is a microcomputer, 25 is a color temperature measuring section, and 26 is a color temperature code imprinting section. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) a color temperature measurement means for measuring the color temperature of a light source illuminating a subject; a coding means for coding the color temperature measured by the color temperature measurement means; and a color temperature measurement means for coding the color temperature measured by the color temperature measurement means; A color temperature information recording camera comprising a recording means for recording a color temperature code in a recording area of a photographic film other than the photographing area in which the subject is recorded simultaneously with the photographing of the subject. (2) A first step of measuring the intensity of light components of multiple wavelengths included in the light of the light source illuminating the subject; and determining the color temperature of the light source from the intensity of the light component measured in the first step. A second step of determining the color temperature code corresponding to the color temperature;
A color temperature information recording method comprising the step of simultaneously recording the subject in a recording area of a photographic film other than the photographing area in which the subject is recorded.