JPH06148736A - Data recorder for camera - Google Patents

Abstract

PURPOSE:To store color temperature data in as small capacity as possible and to prevent the fact that a part of data is destructed by the contamination, damage, etc., of a recording medium and a white balance can not be adjusted. CONSTITUTION:Plural color stimulus specifications based on the output of the color temperature sensor 3 are corrected so as to make the total of the color stimulus specifications constant and then, recorded by a recording unit 4. Moreover, a specific color component in plural color stimulus specifications based on the output of the color temperature sensor 3 is emphasized and then, recorded by the recording unit 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera data recording apparatus for recording information at the time of photographing on a film or the like.

[0002]

2. Description of the Related Art Generally, when using a negative color film, for example, when shooting a subject illuminated by a naked light bulb, a very red image will result if the image is shot as it is. When baking, the so-called white balance correction is performed to remove redness.

However, even with the same bare bulb, the degree of redness varies greatly depending on the power supply voltage for driving the same, and the difference becomes even greater when the type of illumination is different. And, for example, the light of a candle is more reddish than the naked light bulb, and the difference in the light of the sun between daytime and sunset is large. Therefore, it is necessary to make a correction suitable for each illumination light color.

The determination of the correction amount of the white balance correction is good when the type of illumination is known, but in an ordinary photo lab, the type of illumination can be determined only within the range shown in the photograph, and the amount of illumination is determined. The reality is that the more carefully the types are processed, the more difficult the work can be done.

Since it is common for an operator to judge the degree of redness with experience and intuition while watching the tone of a negative film or by automatic operation of a printing machine, sometimes unsatisfactory color tone. It is often finished. Therefore, a technique has been proposed in which color information of the light source light that has been photographed is attached to a negative film at the time of photographic printing, and the printing color is reproduced on photographic paper based on the data.

As a method of providing this color information, a technique of imprinting a white color with a photographing light source on a part of a negative film, or a numerical value or symbol of the information of the light source light disclosed in Japanese Patent Laid-Open No. 51-117632 is used. Techniques for digitizing and recording as digital data are being considered. Furthermore, Japanese Patent Application No. 4
Japanese Patent Publication No. 48771 discloses a technique of recording digital data by recording minute pits on the film base surface using a minute heating element.

[0007]

However, in the technique disclosed in Japanese Patent Laid-Open No. 51-117632 described above, the information of the light source light is recorded as digital data and is reproduced at the time of printing to correct the color temperature. There is a problem that the white balance cannot be adjusted when a part of the recorded data is destroyed due to contamination or damage of the medium. Further, since other information must be recorded at the same time, it is better that the data amount is as small as possible. The present invention has been made in view of the above problems, and an object of the present invention is to record color temperature data in a capacity as small as possible, and to partially destroy the data due to contamination or damage of a recording medium, and to obtain a white balance. It is to prevent the adjustment from becoming impossible.

[0008]

In order to achieve the above object, the data recording device for a camera according to the first aspect of the present invention detects the light color of ambient light or the type of light source at the time of photographing by the camera. Color detecting means, recording means for recording the detection result of the color detecting means on a recording medium, reproducing means for reproducing the data recorded on the recording medium, and printing a film image photographed by the camera. In a camera system including a printing device that performs color correction based on the data reproduced by the reproducing device, a plurality of color stimulus values based on the output of the color detecting device are adjusted so that their sum becomes constant. After the correction, the recording is performed by the recording means.

Further, the camera data recording apparatus according to the second aspect records color detection means for detecting the light color of ambient light or the type of the light source at the time of photographing by the camera, and the detection result of the color detection means. Recording means for recording on a medium; reproducing means for reproducing data recorded on the recording medium;
In a camera system comprising a printing device for performing color correction on the basis of the data reproduced by the reproducing means when printing a film image taken by the camera, a plurality of colors based on the output of the color detecting means. It is characterized in that a specific color component of the stimulus value is emphasized and then recorded in the recording means.

[0010]

That is, in the camera data recording apparatus according to the first aspect of the present invention, after the plurality of color stimulus values based on the output of the color detecting means are corrected so that their sum becomes constant,
It is recorded by the recording means. Further, in the data recording device of the camera according to the second aspect, the specific color component among the plurality of color stimulus values based on the output of the color detection unit is emphasized and then recorded by the recording unit.

[0011]

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

FIG. 1 is a view showing the arrangement of a data recording device for a camera according to an embodiment of the present invention. As shown in the figure, a lens 2 and a recording unit 4 are connected to the camera body 1, and a color temperature sensor 3 is connected to the recording unit 4. However, the color temperature sensor 3 may be directly connected to the camera body 1 and the color information of the light source light may be sent to the recording unit 4 via the camera body 1.

In such a structure, as shown in FIG. 2, when the object 6 illuminated by the light source 5 is photographed by the data recording device of the camera of this embodiment, the color temperature from the camera body 1 to the recording unit 4 is changed. A command is issued to record the signal of the sensor 3 and data indicating the state of the camera. Then, the recording unit 4 operates as shown in FIG.
Calculate and record the color temperature recorded value. This operation will be described later.

The color temperature data recorded according to the present embodiment is reproduced by the reproducing device 21 in FIG. 3 at the time of printing a photograph, and the operation device 22 performs the operation as shown in FIG. Will be described later.

FIG. 3 is a diagram showing the connection relationship of the signal system of the reproducing device 21 and the photographic printing device 23 for reproducing / printing the color temperature data recorded by the data recording device of the camera according to this embodiment.

In the figure, the data recorded by the recording unit 4 is reproduced by the reproducing device 21, the reproduced signal is subjected to white balance adjustment by the arithmetic unit 22 which is a part of the reproducing device 21, and the photographic printing device 23. Be transmitted to. Then, in the photo printing device 23, information is printed on the photo based on the signal. Recording of color temperature data by the camera data recording apparatus according to the above-described embodiment will be described below with reference to the flowchart of FIG.

First, the value from the color temperature sensor 3 is input (step S101), and the subroutine "green-magenta color enhancement (hereinafter abbreviated as GM)" is executed (step S).
102). Then, the subroutine "{R (red) + G
(Green) + B (blue)} = constant value conversion "is performed so that the total value of R, G, B becomes a constant C2 (step S103), and the converted values of R, G, B are converted. Is output to the recording buffer that is referred to when recording on the film (step S104), and all operations are finished (step S105) Therefore, when reading the recorded data, the values of R, G, and B are read. It is possible to judge the recording error by checking whether the sum of the two is a constant C2.
5 is a flowchart showing a sequence of a subroutine "GM color enhancement" executed in step S102 of FIG.

In this subroutine, first, a desired emphasis magnification is input to a variable C (4 times in this embodiment) (step S201), and then a subroutine "GM direction compression / expansion calculation" is executed (step S201). S202) and returns to the main routine (step S203). The subroutine "GM direction compression / expansion calculation" is commonly used by both the recording unit 4 and the reproducing device 21. Figure 8
5 is a flowchart showing a sequence of a subroutine "GM direction compression / expansion calculation" executed in step S202 of FIG. In this subroutine, first, the sum of R, G and B is set to "1" (step S40).
1 to S404). The fraction during calculation is incorporated in R.

Then, the value in the G direction when converted into the two-dimensional coordinates of the G direction and the direction orthogonal to the G direction is calculated as GM (step S405). The value of GM is converted by C, multiplied by C, and calculated again as the value of the G vector, and the result is set to G '(step S406).

Further, after the values of the R, G, and B vectors are not processed negative, processing is performed by an operation that does not include the undercolor (steps S407 to S415), and the missing undercolor is restored. (Step S416-
S420) and returns to the main routine (step S42).
1). Here, the undercolor is a shaded portion (UCR) in FIG. 10, which is, so to speak, a white portion of the color. FIG. 6 is a flowchart showing the sequence of the subroutine "{R + G + B} constant value conversion" executed in step S103 of FIG.

In this subroutine, first, {R + G +
The value of B} is set to a constant C2 (steps S301 and S30).
2). Then, the calculation error is added to R so that it becomes C2 and the process returns to the main routine (steps S303 to S303).
305). Here, the calculation error is put into R as
This is because the difference between the R and B values is visually inconspicuous.

FIG. 7 is a diagram showing a state of data recorded by a method of recording data by forming pits by minute dents on the film base surface. Incidentally, the recording system may be, for example, magnetic or an optical image of silver salt.

FIG. 7A is a diagram showing a recording position when recording is performed outside the perforation hole of the 35 mm film, and FIG. 7B is a partially enlarged view of the recording data 100. , Block horizontally, record data vertically and so on. FIG. 7C is a diagram schematically showing a block to be recorded, a column of recording positions, and a positional relationship of the contents to be recorded. The recording contents are shown in a shaded area in FIG. The R, G, and B data are recorded at different positions.

The recording of color temperature data according to this embodiment has been described above. Next, referring to FIG. 11, the arithmetic unit 22 of the reproducing unit 21 connected to the photographic printing unit 23 will be described.
The algorithm of will be described.

When the reproduction device 21 reads the data, it is recorded in a storage area called a reproduction buffer (not shown). The color temperature data R, G, B are read from this reproduction buffer (step S501). And this read R,
If the sum of G and B is not a constant C2, it is an error (step S502), error recovery processing is performed (step S503), and processing for restoring the GM component emphasized during recording is performed (step S502). S504). Then, the color temperature data is corrected and converted according to the state of each part of the camera (step S505), the processed color temperature data is output to the photographic printing device 23, white balance is performed, and the process is ended (step S506). FIG. 12 is a flowchart showing the sequence of the subroutine “error restoration” of step S503 in FIG.

In this subroutine, first, when R is an error, the closest light source data and their distances are Dr, Rr.
, Gr, Br are recorded (steps S601 to S60).
3). Then, when G is an error, the closest light source data and the distance are recorded in Dg, Rg, Gg, and Bg (steps S604 to S606). Then, when B is an error, the closest light source data and its distance are Db and R.
It records in b, Gb, and Bb (steps S607 to S60).
9). Further, the light source data having the shortest distance among Dr, Dg, and Db is input to the variables R, G, and B, and the processing is ended (steps S610 to S616). In this way, in this subroutine, when one of R, G, and B is erroneously read, appropriate light source data is applied to restore it.

For example, FIG. 13 (a) is a two-dimensional display in which the R, G, and B vectors are shifted by 2 / 3πrad. In the figure, the white circles are the positions of the light sources prepared in advance. FIG. 13 (b) is a diagram showing a part of FIG. 13 (a), and a black circle is a correction of one of the reproduced R, G, and B data. In FIG. 13B, the white circle in the direction of the arrow is the closest, so the distance to the white circle is calculated. Even when the R, G, and B data are corrected, it is determined whether or not the distance from the white circle is closest, and the value of the closest white circle is used as the restored data.

Note that the restoration data of R, G, and B, which have the closest values to the white circles, may be used as the restoration data. In this case, even between the prepared light sources, the restoration can be performed accurately. If there are two or more errors, the values may be greatly different. FIG. 14 is a flowchart showing the sequence of the subroutine "latest light source detection" used in steps S602, 605, 608 in FIG.

In this subroutine, the variable i indicating the order of the light sources to be compared is set to "1" (step S70).
1). Then, the variable D that stores the distance to the nearest light source data is set to the maximum possible value (step S702).

Further, the variable j for storing the number of the nearest light source data is set to "1" (step S70).
3). Calculate the distance to the light source to be compared (step S
704). Then, if the calculated distance is smaller than the current D, the distance is stored in D, and the number of the light source is stored in j (steps S705 to S707).

Then, i is incremented (step S708), the process returns to step S704 if i is not larger than the number of light sources stored, and if it is larger, the jth data is stored in R ', G', B '. Then, the process returns to the main routine (steps S709 to S711). FIG. 15 shows FIG.
9 is a flowchart showing a sequence of a subroutine "GM color reduction" executed in step S504 in FIG.

In this subroutine, first, the desired reduction ratio is input to the variable C (0.25 times in this embodiment) (step S801), and the subroutine "GM direction compression / expansion calculation" is executed ( Step S802) returns to the main routine (step S803).

FIG. 16 shows the above step S in FIG.
5 is a flowchart showing a sequence of a subroutine “after conversion of color temperature data according to states of respective parts of camera, output” executed in step 505.

In this subroutine, first, the variable T containing the value of the error-proneness is cleared to 0 (step S90).
1). If the lighting is bright, it is judged as natural light and G-
Since there are few M components, the value of T is increased (step S9).
02, S903). At this time, if the color temperature is high, it is even more desirable.

Furthermore, if there is flicker in the illumination, it is determined that the light is not natural light, and since there are many GM components, the value of T is reduced (steps S904 to S906). If the focal length of the taking lens is large, it is highly likely that the lens is taken outside, so the value of T is increased (steps S907 and S9).
08).

If the focus position of the photographic lens is far away, it is highly likely that the image is taken outside. Therefore, it is determined that the image is taken with natural light, and the G-M component is small, so the value of T is increased ( Steps S909 and S910).

Further, when the photographic lens is a macro lens and an TTL colorimetric sensor is used during close-up photography, an error occurs due to the color of the subject, so the value of T is increased (steps S911 to S91).
4).

Then, the GM component is compressed according to the value of T, and the process returns to the main routine (steps S915 and S91).
6). Note that the illuminance at the time of shooting, the flicker value of the illumination light, and the like are recorded as data at the position shown in FIG. 7C.

Here, the recorded color temperature data does not always accurately record the color temperature of the light source, and an error may occur depending on the detection method and the state at the time of detection. Color temperature data is corrected by predicting the likelihood of error from the state of each part. In general, the permissible range of red and blue color misregistration is narrow, so when it is determined that an error is likely to occur, the G-value of the light source light color value depends on the degree of error.
The value in the M direction is compressed and used as data for white balance.

As described above in detail, in the data recording device for a camera of the present invention, the values of the color stimulus values of the color temperature sensor to be recorded are recorded in different columns or rows, respectively, so that the recording medium of the recording medium can be recorded. Even if the recorded data is destroyed due to contamination or damage, all the data for white balance will not be destroyed.

Further, since the total of the color stimulus values of the recorded color temperature sensor is set to a constant value, if there is only one destroyed data, the data can be restored. Then, in this reproduction result, if the total of the color stimulus values is not a constant value, an error is generated, and one of the recorded color stimulus values is excluded, and the combination of the combination closest to the light source data prepared in advance is set. Adopt one.

Further, since human vision is very sensitive to deviations of green and magenta colors, it is necessary to make corrections with fine precision, and the deviation of the light source colors to green and magenta colors is small. By recording the color stimulus value of the color sensor with the green and magenta color components emphasized, a more beautiful correction is possible. By performing compression / expansion, fine correction can be performed with a small capacity.

[0043]

According to the present invention, the color temperature data is stored with a capacity as small as possible, and it is possible to prevent the data from being partially destroyed due to the contamination or damage of the recording medium and the white balance adjustment being disabled. It is possible to provide a data recording device of a camera capable of performing the same.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a data recording device of a camera according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a subject 6 illuminated with light from a light source 5 is photographed by the data recording device of the camera according to the present embodiment.

FIG. 3 is a diagram showing a connection relationship of a signal system of a reproduction device for reproducing / printing color temperature data recorded by a data recording device of the camera of the present embodiment and a signal system of a photographic printing device.

FIG. 4 is a flowchart for explaining recording of color temperature data by the data recording device of the camera according to the embodiment.

5 is a flowchart showing a sequence of a subroutine "GM color enhancement" executed in step S102 of FIG.

FIG. 6 is a flowchart showing a sequence of a subroutine “constant value conversion of {R + G + B}” executed in step S103 of FIG.

7 (a) to 7 (c) are diagrams showing a state in which recording is performed by a recording unit 4 of a method of recording data by forming pits by minute dents on a film base surface.

8 is a flowchart showing a sequence of a subroutine "GM direction compression / expansion calculation" executed in step S202 of FIG.

FIG. 9 is a conceptual diagram of a color temperature locus.

FIG. 10 is a diagram for explaining an under color.

11 is a flowchart for explaining an algorithm of the arithmetic unit 22 of the reproducing apparatus 21 connected to the photographic printing apparatus 23. FIG.

FIG. 12 is a flowchart showing a sequence of a subroutine “error restoration” of step S503 in FIG.

FIG. 13A is a diagram in which each RGB vector is set to 2 / 3πrad.
It is displayed two-dimensionally by shifting each, and (b) is
It is a part of (a), and a black circle is a correction of one of the reproduced RGB data.

FIG. 14 shows steps S602, 605 in FIG.
6 is a flowchart showing a sequence of a subroutine “latest light source detection” used in 608.

FIG. 15 is a flowchart showing a sequence of a subroutine “BM color reduction” in step S504 of FIG.

16 is a flowchart showing the sequence of the subroutine "after conversion of color temperature data depending on the state of each part of the camera and output" in step S505 of FIG.

[Explanation of symbols]

1 ... Camera body, 2 ... Lens, 3 ... Color temperature sensor, 4 ...
Recording unit.

[Procedure amendment]

[Submission date] April 13, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

The color temperature data recorded according to the present embodiment is reproduced by the reproducing device 21 in FIG. 3 at the time of printing a photograph, and the operation device 22 performs the operation as shown in FIG. Will be described later.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

Here, the recorded color temperature data does not always accurately record the color temperature of the light source, and an error may occur depending on the detection method and the state at the time of detection. Color temperature data is corrected by predicting the likelihood of error from the state of each part. In general, the permissible range of color misregistration between green and magenta is generally narrow, so when it is determined that an error is likely to occur, the value of the light source light color value in the GM direction is compressed and white balance Used as data.

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 13

[Correction method] Change

[Correction content]

[Fig. 13]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 16

[Correction method] Change

[Correction content]

FIG. 16 ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 9, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

Claims (2)

[Claims] 1. A color detecting means for detecting a color of ambient light or a type of a light source at the time of photographing with a camera, a recording means for recording a detection result of the color detecting means on a recording medium, and the recording medium. A camera system comprising a reproducing device for reproducing the recorded data, and a printing device for performing color correction based on the data reproduced by the reproducing device when printing a film image taken by the camera. A data recording device for a camera, wherein the plurality of color stimulus values based on the output of the color detecting means are corrected by the recording means after being corrected so that the total becomes constant. 2. A color detecting means for detecting a light color of ambient light or a type of a light source at the time of photographing with a camera, a recording means for recording a detection result of the color detecting means on a recording medium, and the recording medium. A camera system comprising a reproducing device for reproducing the recorded data, and a printing device for performing color correction based on the data reproduced by the reproducing device when printing a film image taken by the camera. A data recording device for a camera, wherein a specific color component among a plurality of color stimulus values based on the output of the color detecting means is emphasized and then recorded in the recording means.