JPH0651393A - Camera - Google Patents

Abstract

PURPOSE:To precisely record the color temperature information of the light source of a photographing time on a film and to enable color correction information recorded on the film to he corrected by the light source information of an object and based on the fact whether stroboscope is used or not in order to execute printing by natural color tone at a printing time. CONSTITUTION:By a colorimetry part 11, the chromaticity of the light of a photographic picture is measured and a color tone signal is outputted. By a CPU 10, the color tone signal is received and compared with a reference color tone level and color correction quantity is calculated. Besides, a color correction signal corresponding to the calculated color correction quantity is outputted in connection with consecutive photographing actions. By a writing head 20, the color correction signal is recorded on a recording medium on the film with a magnetic recording part 34 as the color correction quantity information of the printing time. By the CPU 10, a color correction quantity signal that the color correction quantity corresponds to a prescribed value is also controlled to be outputted or prevented from being outputted when a stroboscopic light emission device 30 is actuated by a stroboscope control circuit 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for recording various kinds of photographing information on a film, and more particularly to a camera for correcting color correction information recorded on a film according to light source information of a subject and whether or not a flash device is used.

[0002]

2. Description of the Related Art Conventionally, cameras for recording various information on a film have been developed. In such a camera,
For example, Japanese Patent Application Laid-Open No. 4-81839 discloses a print creating method using light source information at the time of shooting recorded in a shooting information recording unit of a film.

Further, in photographing using a color negative film, the subject image is generally green under a fluorescent light.
It is printed in orange under incandescent light and bluish in fine weather. Therefore, unlike the color tone of the subject image at the time of shooting, the printed photograph may be dissatisfied.

[0004]

In order to prevent this, a color filter is used to correct the color tone. That is, the color filter may be attached to the lens of the camera to take a picture. However, such a filter mounting operation has to be performed for normal photographing, which is troublesome. In addition, it is quite difficult for ordinary people to correct the color temperature exactly as seen by the photographer's eyes.

Further, the above-mentioned Japanese Patent Application Laid-Open No. 4-81839 does not disclose the technical means of the camera for recording accurate light source information. Therefore, it was unclear how to reproduce the light source information at the time of shooting.

The present invention has been made in view of the above problems, and a camera capable of accurately recording color temperature information of a light source at the time of photographing on a film and printing at a natural color tone by using the color temperature information at the time of printing. The purpose is to provide.

[0007]

That is, the present invention provides a flash light emitting device, a color measuring unit for measuring the chromaticity of light on a photographic screen and outputting a color tone signal, and receiving the color tone signal.
The color correction signal is calculated by comparing this color tone signal with a reference color tone level, and a color correction signal corresponding to the calculated color correction amount is output in conjunction with a series of photographing operations; Recording means for recording on a recording medium on a film as color correction amount information at the time of printing, and the arithmetic means is a color correction amount signal corresponding to a predetermined value when the flash light emitting device is in operation. Is output, or the color correction amount signal is not output.

The present invention also provides a flash light emitting device, a colorimetric means for measuring the chromaticity of light on a photographing screen and outputting a color tone signal, and receiving the color tone signal and comparing the color tone signal with a reference color tone level. Then, the color correction amount is calculated and a color correction signal corresponding to the calculated color correction amount is output in synchronization with a series of shooting operations. The color correction signal is used as color correction amount information at the time of printing. A recording means for recording on a recording medium on a film is provided, and the calculating means corrects the calculated color correction amount according to a photographing condition when the flash light emitting device is in operation.

[0009]

In the camera of the present invention, the colorimetric means measures the chromaticity of the light on the photographic screen to output a color tone signal, and the arithmetic means receives this color tone signal and compares it with the reference color tone level. Calculate the correction amount. The calculation means outputs a color correction signal corresponding to the calculated color correction amount in association with a series of photographing operations. Then, the recording means records the color correction signal on a recording medium on the film as color correction amount information at the time of printing. The arithmetic means outputs a color correction amount signal whose color correction amount corresponds to a predetermined value or does not output the color correction amount signal when the flash light emitting device is in operation.

[0010]

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

FIG. 1 is a block diagram showing the overall construction of a camera according to an embodiment of the present invention. In the figure, the CPU 10 which controls the overall operation of this camera includes a color measurement unit 1
1, a photometry unit 12, a film sensitivity setting unit 13, a distance measuring unit 14, a shutter speed setting unit 15, a diaphragm aperture setting unit 16, a flash control circuit 17, and a drive circuit 18.
The photo reflector 19, the write head 20, and the release switch 21 are connected to each other.

The color measuring section 11 includes an optical filter 22a,
22b, 22c and light receiving elements 23a, 23b, 23c, and optical filter 22a and light receiving element 23a, optical filter 22b and light receiving element 23b, optical filter 22.
Each of the combination of c and the light receiving element 23c has the spectral sensitivity of the spectral stimulus value shown in Expression 1. Here, the spectral sensitivities of these spectral stimulus values have the characteristics shown in FIG.

[0013]

[Equation 1]

The light received by the light receiving elements 23a, 23b, 23c is converted into photoelectric conversion circuits 24a, 24b, respectively.
The sample-hold circuit 25a is photoelectrically converted by 24c,
Sample holding is performed at 25b and 25c. The outputs of the sample hold circuits 25a, 25b, 25c are selected by the selection switches 26a, 26b, 26c, and are
In the D converter 27, the output of each sample and hold circuit is sequentially A
A digital signal is output after being D / D converted to the CPU 10.

The photometric unit 12 is composed of a light receiving element 28 and a photometric circuit 29. The light receiving element 28 measures the brightness of the subject, and the light measuring circuit 29 measures the light receiving element 28.
Is photoelectrically converted to output a photometric value to the CPU 10.

The film sensitivity setting unit 13 is composed of a DX code reading switch, and the distance measuring unit 14 is composed of an AF (autofocus) sensor for measuring the distance to the object. The shutter speed setting unit 15 is composed of a manual input switch, and the aperture size setting unit 16 is also composed of a manual input switch.

The strobe control circuit 17 causes the strobe light emitting device 30 to emit light in response to a signal from the CPU 10. The stroboscopic light emitting device 30 is composed of a xenon (Xe) tube, a reflector, or the like.

The drive circuit 18 drives a known shutter 31, diaphragm 32 and film feeding motor 33 by a control signal from the CPU 10. The shutter 31 is operated by the drive circuit 18 at a predetermined shutter speed. Further, the diaphragm 32 is changed to a predetermined diaphragm aperture by the drive circuit 18. Further, the film feeding motor 33
Winds and rewinds the film 34 with a magnetic recording portion.

The photo reflector 19 detects the movement of the perforation (not shown) of the magnetic recording film 34 and outputs a feeding signal to the CPU 10. Further, the write head 20 records a predetermined signal on the magnetic coated surface of the film 34 with a magnetic recording portion, and is controlled by the CPU 10. The release switch 21 is a switch that is turned on and off by the release operation of the photographer.

3 (a) and 3 (b) show the first embodiment of the present invention.
FIG. 3 is a perspective view of the film feeding device of the camera in the embodiment seen through from the rear, FIG. 3 (a) showing a state in which the film is wound on a take-up spool, and FIG. 3 (b) showing the film in a film magazine. The state of rewinding is shown in each.

A pinion gear 35 is provided on the output shaft of the film feeding motor 33 provided in the camera body, and the pinion gear 35 meshes with the sun gear 36. The sun gear 36 meshes with the pinion gear 35 and also meshes with the planet gear 37. This planet gear 3
7 is supported via a gear arm 38 so as to be revolved around the rotation axis of the sun gear 36.

A film winding chamber (not shown) provided on the right side of the rear of the camera body is rotatably provided with a winding spool 39 for winding the film. On the upper end surface of the take-up spool 39,
A spool gear 39a that meshes with the planetary gear 37 when the planetary gear 37 revolves counterclockwise is integrally provided. In this case, the magnetic recording portion-equipped film 34 travels in the direction of arrow A shown in FIG.

On the other hand, an idle gear 40 is provided at a position where the planet gear 37 meshes with the planet gear 37 when the planet gear 37 revolves clockwise. At this time, the planet gear 37 is
As shown in the drawing, the idler gears 40, 41, 42, 43 are connected to the coupler gear 44. In this case, as shown in FIG. 9, the magnetic recording portion-equipped film 34 is shown in FIG.
The vehicle runs in the direction of arrow B in the figure.

On the left side of the rear of the camera body, there is provided a magazine storage chamber for storing the film magazine 45 indicated by the chain double-dashed line. As shown in the figure, the coupler 44 is formed above the magazine storage chamber 45 so that its tip projects in a minus (-) shape.
A coupler gear 44 having a is rotatably provided. The coupler 44a engages with the groove of the spool provided in the film magazine 45 and is integrated with the spool around its axis. The coupler gear 44 always meshes with the idle gear 43 as described above.

Further, at a position slightly closer to the center than the take-up spool 39 and at a position facing the perforation of the film 34 with a magnetic recording portion, the perforation of the film 34 with a magnetic recording portion is fixed to the camera body. Photoreflector 1 that outputs a pulse signal each time it passes
9 is provided. In addition, the magnetic recording film 34
A magnetic head (writing head) 20 for recording photographing information on the magnetic coating surface on the back surface of the film on the back surface of the film.
Is provided. Next, the film feeding operation will be described.

When the magnetic recording film 34 is wound up,
As shown in FIG. 3A, by the control operation of the CPU 10, the film feeding motor 33 rotates in the direction of the arrow shown in the drawing, whereby the take-up spool 39 rotates in the direction of the arrow. As a result, the film 34 with the magnetic recording portion is pulled out from the film magazine 45 in the direction of the arrow A in the drawing, and wound on the winding spool 39. At the same time, the feeding amount of the film 34 with the magnetic recording portion is detected by the photo reflector 19, and the film feeding motor 33 is stopped with one frame wound up. Further, during the winding operation, the writing head 20 records the photographing information in the magnetic recording portion of the film 34 with the magnetic recording portion in response to a signal from the CPU 10.

On the other hand, when the film magazine 45 is rewound, as shown in FIG. 3B, the film feeding motor 21 is rotated in the direction of the arrow in the figure by the control operation of the CPU 10, so that the coupler gear 44 and the coupler are rotated. 44a rotates in the direction of the arrow in the figure, and the film 34 with the magnetic recording portion wound on the winding spool 39 is rewound into the film magazine 45. At this time, the magnetic recording portion-equipped film 34 moves in the direction of arrow B in the figure. FIG. 4 is a diagram showing the arrangement of the color measuring unit 11 and the photometric unit 12 in the first embodiment of the present invention, and FIG. 5 is a diagram showing the light receiving ranges of the color measuring unit 11 and the photometric unit 12.

In FIG. 4, a taking lens 47 having an optical axis O is provided on the front surface of the camera body 46. And, above the taking lens 47,
A photometric unit 12 and a colorimetric unit 11 are provided on the upper part. In addition, the taking lens 47 in the camera body 46
A film 34 with a magnetic recording portion is set to the rear of the writing head 20, and the writing head 20 contacts as shown in the drawing.

Here, the light receiving angle of the photometric unit 12 is indicated by α, and the light receiving angle of the color measuring unit 11 is indicated by β. Then, the light receiving ranges 12a and 1 of the photometry unit 12 and the color measurement unit 11
1a becomes as shown in FIG.

In FIG. 5, reference numeral 47a indicates a photographing field angle photographed by the taking lens 47. Metering unit 1
The light receiving range 12a of 2 is almost the same as the photographing angle of view 47a,
Since the shooting angle of view 47a is in a partial range, it is possible to perform photometry for exposing the film 34 with an appropriate amount of light without being affected by the peripheral brightness difference.

On the other hand, since the light receiving range 11a of the color measuring section 11 is wider than the photographing field angle 47a, it is possible to measure the chromaticity of the ambient light without being influenced by the color of the subject. ing. That is, the light receiving angle β of the color measuring unit 11 is set to be larger than the light receiving angle α of the light measuring unit 12. Next, the operation of the first embodiment will be described with reference to the flowchart of FIG.

The release switch 21 is operated by the release operation.
When is turned on (step S1), distance measurement is started by the operation of the distance measuring unit 14 (step S2), and focusing is performed (step S3). Next, the photometric unit 12 measures the brightness of the subject and outputs the photometric value to 15 (step S
4). Then, the color measurement unit 11 measures the chromaticity of the field and outputs a color tone signal to the CPU 10 (step S5). Next, the CPU 10 inputs the film sensitivity value of the film sensitivity setting unit 13 (step S6).

Here, the CPU 10 determines whether or not the subject is brighter than a predetermined brightness based on the outputs of the photometry unit 12 and the film sensitivity setting unit 13 (step S7). If it is determined that the stroboscopic light emission is not necessary, the appropriate shutter speed value and aperture value are calculated based on the input values from the photometry unit 12 and the film sensitivity setting unit 13 (step S8). Then, the drive circuit 18 drives and controls the diaphragm 32 and the shutter 31 according to the calculated values (steps S9 and S10) to expose the film 34.

Then, the CPU 10 compares the color tone signal input from the color measuring section 11 with the reference color tone level, and calculates the optimum color correction amount at the time of printing (step S11). Next, the CPU 10 causes the drive circuit 18 to operate the film feeding motor 33 (step S12), and the film 34
At the same time as winding one frame, the calculated color correction amount signal is output to the writing head 20 and the color correction amount information at the time of printing is recorded on the film 34 during the winding operation (step S13).

On the other hand, in step S7, if the subject is darker than a predetermined brightness and strobe light is required due to the outputs of the photometry unit 12 and the film sensitivity setting unit 13, the CPU
When 10 is judged, the photometry unit 12 and the film sensitivity setting unit 1
3 and an appropriate shutter speed value, aperture value, and stroboscopic light emission amount are calculated based on the input values from the distance measuring unit 14 and the distance measuring unit 14 (step S14).

The drive circuit 18 drives and controls the aperture 32 and the shutter 31 according to the calculated values, and the strobe control circuit 17 controls the strobe emission device 30 during the opening of the shutter 31 according to the calculated values. (Steps S15 and S16). Next, the CPU 10
Operates the film feeding motor 33 in the same manner as described above (step S17) to wind the film 34 by one frame. At this time, the subject light being exposed is less affected by the chromaticity of the external light and is almost determined by the chromaticity of the strobe light.
Here, since the strobe light generally emits at a color tone level where color correction is unnecessary, during the winding operation of the film 34, color correction information corresponding to a color correction amount at the time of printing is recorded in the magnetic recording portion of the film. (Step S18). In this way, when one frame of the film 34 has been wound up (step S19), the CPU 10 stops the film feeding motor 33 (step S20).

In the first embodiment described above, it can be estimated that color correction is generally not performed during printing when color correction information is not recorded on the film. Therefore, it is not necessary to record the color correction information on the film 34 at the time of strobe light emission. That is, in the flowchart of FIG. 6, the process of step S18 may be omitted.

On the other hand, when the Xe tube of the stroboscopic light emitting device is downsized to a size for use in, for example, a compact camera, the color temperature of the emitted light rises and color tone correction may be necessary. In a camera having such a stroboscopic light emitting device, step S1 of the flowchart of FIG.
Instead of 8, the predetermined value corresponding to the difference between the color tone of the strobe light and the reference color tone level is used as the color correction information in the film 34 in step S18 ′ shown in the flowchart of FIG.
It may be recorded in. In this case, the other steps are the same as those in the flowchart of FIG.

As described above, in the first embodiment, the color tone of the light emitted to the subject is recorded on the film as the color correction amount information regardless of whether or not the strobe light is emitted, so that the optimum color correction can be performed at the time of printing. Therefore, the photographer can easily obtain the desired print. In a camera that does not have a stroboscopic light emitting device, the color measurement unit 11 is always
The color correction amount information at the time of printing may be recorded on the film 34 on the basis of the output of. Next, a second embodiment of the present invention will be described.

FIG. 8 is a diagram showing the arrangement of the color measuring unit 11 and the photometric unit 12 in the second embodiment of the present invention, and FIG. 9 is a diagram showing the light receiving ranges of the color measuring unit 11 and the photometric unit 12. is there. In the embodiments described below, the same parts as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

The difference of the second embodiment from the above-mentioned first embodiment is that the colorimetric section 11 provided on the photometric section 12 is provided.
However, the point is set upward as compared with the first embodiment of FIG. That is, the light receiving range 11 of the color measuring unit 11
a is a range wider than the photographing field angle 47a and is a range obliquely above. On the other hand, the light receiving angle γ of the color measuring unit 11 is set to be larger than the light receiving angle α of the light measuring unit 12 as in the first embodiment described above. The advantages of the second embodiment will be described.

In general, the light source is often located in the upper part both outdoors and indoors, and conversely, the lower part is often in a predetermined color on the ground or floor. Therefore, it is often the case that the colorimetric unit 11 measures the light obliquely upward so that more appropriate chromaticity of the light source can be measured. FIG. 10, FIG. 11 and FIG. 12 are diagrams showing the ratio of the amount of light exposed to the film depending on the subject distance, shutter speed, and subject brightness.

The third to fifth embodiments of the present invention will be described below with reference to FIGS. 10, 11 and 12. still,
The configurations and the reference operations of the third to fifth embodiments are the same as those of the above-mentioned first embodiment, and the description thereof will be omitted. A third embodiment of the present invention will be described with reference to the flowcharts of FIGS.

FIG. 10 is a diagram showing the ratio of the amount of light exposed to the film depending on the subject distance. The horizontal axis represents the subject distance, and the vertical axis represents the ratio of the amount of light exposed to the film. In addition, the total light amount of the strobe light in the shaded area and the external light (field light) in the dotted area is 100%, which indicates an appropriate exposure amount (also in FIGS. 11 and 12).

Here, the reaching distance D of the strobe light is determined by the maximum amount of strobe light emission, the aperture diameter of the taking lens and the film sensitivity. When the subject is closer than the reaching distance D, the ratio of the strobe light is extremely high and the influence of external light is small, so that color correction is generally unnecessary. However, when the subject is farther than the reaching distance D, underexposure is caused only by the strobe light. Therefore, long-time exposure is required, and the influence of external light comes out.

Therefore, similarly to the first embodiment described above,
In step S27, when the CPU 10 determines from the outputs of the photometry unit 12 and the film sensitivity setting unit 13 that the subject is darker than the predetermined brightness and the strobe emission is necessary, the aperture is opened to calculate the optimal strobe emission amount. (Step S34). Then, when it is calculated that the subject is far and the strobe light emission amount is insufficient due to the input values from the photometry unit 12, the film sensitivity setting unit 13, and the distance measurement unit 14 (step S35), the CPU 10 performs the following steps S41 to S41. S
The operation of No. 49 is performed. Incidentally, steps S21 to S
33, steps S36 to S40, and step S50,
S51 is step S1 to S1 of the flowchart of FIG.
3, steps S14 to 18, and steps S19 and S2
Since it is the same as 0, the description is omitted.

As described above, when it is determined in step S35 that strobe light emission is necessary, first, it is decided to control the aperture to be open, and the photometry unit 12, film sensitivity setting unit 13 and distance measurement unit 14 are determined. From the output signal from, the insufficient value of the exposure amount of only the strobe light is calculated (step S41). Then, based on the input value from the photometric unit 12 for the insufficient value, a shutter speed value sufficient to be captured by external light is calculated (step S42). Then, the ratio of the strobe light to the subject and the external light is calculated (step S43).

Next, the color tone signal input from the color measuring unit 11 is compared with the reference color tone level, and the color correction amount for only external light is calculated (step S44). The calculated color correction amount is multiplied by the calculated ratio of external light to calculate the optimum color correction amount at the time of actual printing (step S45).
Then, the drive circuit 18 drives and controls the aperture 32 to open (step S46). At the same time, the shutter 31 is driven and controlled with the calculated value, and the strobe control circuit 17 controls the strobe light emitting device 30 to emit the maximum amount of light during the opening of the shutter 31 (step S47).

When the exposure operation is completed, the film feeding motor 33 is operated by the drive circuit 18 to wind the film 34 by one frame (step S48). Further, the color correction amount signal calculated at the same time is output to the writing head 20, and the color correction amount information at the time of printing is recorded on the film 34 during the winding operation (step S49).

As described above, in the third embodiment, the color tone of the light radiated to the subject which is photographed with an appropriate amount of light and which changes depending on the subject distance is calculated regardless of the subject distance at the time of strobe light emission. Since the color correction information is recorded on the film, optimum color correction can be performed at the time of printing.

Further, when the photographer's intended aperture diameter is set by the aperture diameter setting unit 16, the same calculation and operation can be performed only by replacing the above-mentioned aperture value with the aperture value with the set value. You can get the same effect. Next, a fourth embodiment of the present invention will be described with reference to the flowcharts of FIGS.

FIG. 11 is a diagram showing the ratio of the amount of light exposed to the film depending on the shutter speed. The horizontal axis represents the shutter speed, and the vertical axis represents the ratio of the amount of light exposed to the film as in FIG.

Here, when the shutter speed is high,
Since the ratio of strobe light is extremely high and the influence of external light is small, color correction is generally unnecessary. However, when slow sync with a low shutter speed is performed, the influence of external light comes out, and thus color correction is necessary.

Then, the film sensitivity is input (step S
66) and then the photographer sets the shutter speed by the shutter speed setting unit 15 (step S6).
7) When the CPU 10 determines that the strobe light emission is necessary due to the outputs of the photometry unit 12, the film sensitivity setting unit 13, the shutter speed setting unit 15 and the forced light emission signal of the strobe (not shown) (step S68), the CPU 10 operates The following steps S75 to S82 are performed. Since steps S61 to S66, steps S68 to S74, and steps S83 and S84 are the same as steps S1 to S6, steps S7 to 13, and steps S19 and S20 of the flowchart of FIG. 6, respectively, description thereof will be omitted. .

As described above, when it is determined in step S68 that strobe light emission is necessary, the photometric unit 12,
Based on the input values from the film sensitivity setting unit 13, the distance measuring unit 14, and the shutter speed setting unit 15, an appropriate aperture diameter and strobe emission amount are calculated (step S75). next,
The ratio of the strobe light to the subject and the external light is calculated (step S76), and the color tone signal input from the color measurement unit 11 is compared with the reference color tone level to calculate the color correction amount for the external light only. (Step S77).

Next, the calculated color correction amount is multiplied by the calculated ratio of the external light to calculate the optimum color correction amount at the time of actual printing (step S78). Then, the drive circuit 18 drives and controls the aperture 32 with the calculated value and the shutter 31 with the set value, and the strobe control circuit 17 causes the strobe light emitting device 30 to emit light according to the calculated value during the opening of the shutter 31. Control (steps S79, S
80).

When the exposure operation is completed, the film feeding motor 33 is operated by the drive circuit 18 to move the film 34.
Is wound by one frame (step S81). At the same time, the color correction amount signal calculated at the same time is output to the writing head 20, and the color correction amount information at the time of printing is recorded on the film 34 during the winding operation (step S82).

As described above, in the fourth embodiment, regardless of the shutter speed at the time of strobe light emission, the color tone within the exposure time of the light which is photographed with an appropriate amount of light and which is changed by the shutter speed is emitted to the subject. Since it is calculated and recorded as color correction information on the film, optimum color correction can be performed at the time of printing. Next, a fifth embodiment of the present invention will be described with reference to the flowcharts of FIGS.

FIG. 12 is a diagram showing the ratio of the amount of light exposed on the film depending on the subject brightness. In the figure, the horizontal axis represents the subject brightness and the vertical axis represents the ratio of the amount of light exposed on the film, as in FIG.

Here, when the subject brightness is low and the subject is dark, the ratio of strobe light is extremely high and the influence of external light is small, so color correction is generally unnecessary. However, when stroboscopic photography is performed in a bright state with high subject brightness, the influence of external light comes out, and thus color correction is necessary.

Therefore, a strobe forced light emission signal (not shown) is input by the operation of the photographer (step S98), and the influence of external light is larger than a predetermined amount based on the input values of the photometry unit 12 and the film sensitivity setting unit 13. (Step S11
0), the CPU 10 executes the next step S111.
The operation of S118 is performed. Incidentally, steps S91 to S9
7, steps S99 to S104, steps S105 to S
Steps 109 and S119 and S120 are the same as steps S1 to S7, steps S8 to S13, steps S14 to S18, and steps S19 and S20 of the flowchart of FIG.

Based on the input values from the photometry unit 12, the film sensitivity setting unit 13, and the distance measurement unit 14, an appropriate aperture diameter, shutter speed, and strobe light emission amount are calculated (step S1).
11). Next, the ratio of the strobe light to the subject and the external light is calculated (step S112), and the colorimetric unit 11
The color tone signal input from is compared with the reference color tone level, and the color correction amount for only external light is calculated (step S11).
3).

Next, the calculated color correction amount is multiplied by the calculated ratio of external light to calculate the optimum color correction amount at the time of actual printing (step S114). Then, with the calculated value, the drive circuit 18 causes the diaphragm 32 and the shutter 31
In addition to the drive control, the flash control circuit 17 controls the flash emission device 30 to emit light according to the calculated value during the opening of the shutter 31 (steps S115 and S116).

When the exposure operation is completed, the drive circuit 18 operates the film feeding motor 33 to wind the film 34 by one frame (step S117). At the same time, the color correction amount signal calculated at the same time is output to the writing head 20, and the color correction amount information at the time of printing is recorded on the film 34 during the winding operation (step S118).

As described above, in the fifth embodiment, the color tone of the light radiated to the subject which is photographed with an appropriate amount of light and which is changed by the subject brightness is calculated regardless of the subject brightness at the time of strobe emission, and the color is calculated. Since the correction information is recorded on the film, optimum color correction can be performed at the time of printing.

In the above-mentioned first to fifth embodiments,
Although the reflected light type color measuring means has been described, the present invention is not limited to this. For example, the optical filters 22a, 22b, 22
It may be an incident light type colorimetric means provided with a white optical filter on the front surface of c.

[0067]

As described above, according to the present invention, the color tone of the light is recorded on the film as the color correction amount information regardless of the chromaticity of the object field and the presence or absence of stroboscopic light emission. It is possible to provide a camera in which color correction is possible and a photographer can easily obtain a print with a desired color tone.

Further, when strobe light is emitted, the color tone of the light emitted to the subject during the exposure time, which varies depending on the subject distance, shutter speed, and subject brightness, is calculated and recorded on the film as color correction information, which has been difficult in the past. It is possible to provide a camera that can easily obtain a print with a natural color tone even under such conditions.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a camera according to an embodiment of the present invention.

2 is a spectral sensitivity characteristic diagram of spectral stimulus values by optical filters 22a, 22b, 22c and light receiving elements 23a, 23b, 23c of FIG.

FIG. 3 is a perspective view of the film feeding device of the camera according to the first embodiment of the present invention seen through from the rear, (a) showing a state in which the film is wound on a take-up spool, and (b).
FIG. 4 is a diagram showing a state in which a film is rewound into a film magazine.

FIG. 4 is a diagram showing an arrangement of a color measuring unit 11 and a photometric unit 12 in the first embodiment of the present invention.

FIG. 5 is a diagram showing a light receiving range of the color measuring unit 11 and the photometric unit 12 in the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating the operation of the first embodiment.

FIG. 7 is a flowchart illustrating an operation of a modified example of the first exemplary embodiment.

FIG. 8 is a diagram showing the arrangement of a color measuring unit 11 and a photometric unit 12 in the second embodiment of the present invention.

FIG. 9 is a diagram showing the light receiving ranges of the color measuring unit 11 and the photometric unit 12 in the second embodiment of the present invention.

FIG. 10 is a diagram showing the ratio of the amount of light exposed on the film according to the subject distance.

FIG. 11 is a diagram showing the ratio of the amount of light exposed on the film depending on the shutter speed.

FIG. 12 is a diagram showing a ratio of the amount of light to be exposed on a film according to subject brightness.

FIG. 13 is a flowchart illustrating the operation of the third embodiment.

FIG. 14 is a flowchart illustrating the operation of the fourth embodiment.

FIG. 15 is a flowchart illustrating the operation of the fifth embodiment.

[Explanation of symbols]

10 ... CPU, 11 ... Color measurement section, 12 ... Photometry section, 13 ... Film sensitivity setting section, 14 ... Distance measuring section, 15 ... Shutter speed setting section, 16 ... Aperture aperture setting section, 17 ... Strobe control circuit, 18 ... Drive circuit, 19 ... Photo reflector, 2
0 ... Writing head, 21 ... Release switch, 22a,
22b, 22c ... Optical filters, 23a, 23b, 23
c ... light receiving element, 24a, 24b, 24c ... photoelectric conversion circuit, 25a, 25b, 25c ... sample hold circuit,
26a, 26b, 26c ... Selection switch, 27 ... A / D
Conversion section, 28 ... Light receiving element, 29 ... Photometric circuit, 30 ... Strobe light emitting device, 31 ... Shutter, 32 ... Aperture, 33 ... Film feeding motor, 34 ... Film with magnetic recording section.

[Procedure amendment]

[Submission date] January 29, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

As described above, when it is determined in step S35 that the strobe light emission amount is insufficient , first, it is decided to control the aperture to be open, and the photometry unit 12, the film sensitivity setting unit 13, and the distance measurement unit are determined. By the output signal from 14,
An insufficient value of the exposure amount with only the flash light is calculated (step S41). Then, based on the input value from the photometric unit 12 for the insufficient value, a shutter speed value sufficient to be captured by external light is calculated (step S42). Then, the ratio of the strobe light to the subject and the external light is calculated (step S43).

Claims (6)

[Claims] 1. A flash light emitting device, colorimetric means for measuring the chromaticity of light on a photographic screen and outputting a color tone signal, and receiving the color tone signal and comparing the color tone signal with a reference color tone level to obtain a color. A calculation means for calculating a correction amount and outputting a color correction signal corresponding to the calculated color correction amount in synchronization with a series of photographing operations; and the color correction signal on the film as color correction amount information at the time of printing. A recording means for recording on a recording medium, wherein the arithmetic means outputs a color correction amount signal whose color correction amount corresponds to a predetermined value during the operation of the flash light emitting device, or outputs the color correction amount signal. A camera characterized by not outputting. 2. The camera according to claim 1, wherein the predetermined value of the color correction amount is a difference between a color temperature of the flash light emitting device and a reference tone level. 3. A flash light emitting device, colorimetric means for measuring the chromaticity of light on a photographing screen and outputting a color tone signal, and receiving the color tone signal and comparing the color tone signal with a reference color tone level to obtain a color. A calculation means for calculating a correction amount and outputting a color correction signal corresponding to the calculated color correction amount in synchronization with a series of photographing operations; and the color correction signal on the film as color correction amount information at the time of printing. A camera, comprising: a recording unit for recording on a recording medium, wherein the calculating unit corrects the calculated color correction amount according to a shooting condition when the flash light emitting device is in operation. 4. The camera according to claim 3, wherein the photographing conditions include a subject distance, a light emission amount of a flash light emitting device, an aperture diameter of a photographing lens, and film sensitivity. 5. The camera according to claim 3, wherein the shooting condition includes a shutter speed. 6. The camera according to claim 3, wherein the shooting condition includes the brightness of a subject.