JP2004194184A - Electronic camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic camera system capable of interchanging a lens in which superior white balance adjustment can be performed even if any type of an interchangeable lens is used, and also to provide an electronic camera system in which a person photographing can arbitrarily prepare color temperature correction data corresponding to spectroscopic characteristics of a photographic lens unit. <P>SOLUTION: The electronic camera system is provided with a means 153 of obtaining a first white balance control signal by using a color measuring sensor 151; a means 154 of obtaining a second white balance control signal by using a signal obtained through the photographic lens unit 300; a means 155 of calculating color temperature correction data peculiar to the photographic lens unit 300 by comparing the first/second white balance control signals; a means 156 of controlling the white balance adjustment by the first/second white balance control signals and the color temperature correction data; and a color temperature correction data storage means 157 for storing the color temperature correction data. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic camera system.
[0002]
[Prior art]
Conventionally, in an electronic camera, white balance is adjusted so that a white subject is reproduced white. White balance sets the spectral characteristics of the most standard lens among the spectral characteristics of commonly used lenses, and sets the spectral characteristics and the gain of the red signal circuit of the electronic camera obtained by light from the subject. And the gain of the blue signal circuit are controlled with reference to the green signal.
[0003]
The white balance includes an automatic white balance method and a manual white balance method.
[0004]
In the auto white balance method, it is necessary to measure the color tone (color temperature) of the shooting environment. In the automatic white balance method, there are an external measurement sensor method and a TTL (Through The Lens) method, and the external measurement sensor method adjusts a white balance using data obtained by measuring the color of external light. In the TTL method, the color of external light is calculated from an output signal of an image sensor, and white balance is adjusted using the data.
[0005]
In the manual white balance method, the photographer determines the type of light source (for example, sunlight, a light bulb, a fluorescent light, etc.) in the shooting environment, and selects the type of the light source using light source selection means such as a switch. According to the selection of the light source, the gain of the red signal circuit and the gain of the blue signal circuit are set to a fixed gain specific to the light source which is set in advance. Alternatively, the photographer measures the color tone (color temperature) of the shooting environment, and inputs the color temperature of the shooting environment using the color temperature input unit. The gain of the red signal circuit and the gain of the blue signal circuit are set to fixed color temperature-specific fixed gains according to the input of the color temperature of the photographer.
However, conventional electronic cameras with interchangeable lenses have different spectral characteristics depending on the lens used, so even if the white balance is adjusted based on the color temperature information from the subject by setting the standard lens spectral characteristics, Depending on the interchangeable lens, the spectral characteristics are greatly different from those of the standard lens, and there is a problem that the white balance cannot be accurately adjusted even for the same subject.
[0006]
In contrast, color temperature correction information corresponding to the spectral characteristics of the interchangeable lens is stored in advance in a photographic lens unit that can be exchanged with respect to the camera body. 2. Description of the Related Art There has been proposed an interchangeable lens camera and an interchangeable lens that can perform a good white balance adjustment by performing a balance adjustment (for example, see Patent Document 1).
[0007]
[Patent Document 1]
Japanese Patent Publication No. 7-83481
[0008]
[Problems to be solved by the invention]
However, the conventional system has the following disadvantages.
[0009]
According to the technique disclosed in Japanese Patent Publication No. 7-83481, good white balance adjustment is achieved by storing color temperature correction information corresponding to the spectral characteristics of the interchangeable photographing lens unit in advance in the interchangeable photographing lens unit. Although it is possible, this is applied only to an interchangeable lens capable of storing color temperature correction information corresponding to the spectral characteristics of the photographing lens unit, and color temperature correction information corresponding to the spectral characteristics of the photographing lens unit is stored. When a photographing lens unit that cannot be stored is attached, it is difficult to perform good white balance adjustment.
[0010]
Further, in an interchangeable lens capable of storing color temperature correction information corresponding to the spectral characteristic of the photographing lens unit, a color corresponding to the spectral characteristic of the photographing lens unit under predetermined conditions at the time of shipment to the replaceable photographing lens unit. Although only the temperature correction data is stored, the photographer can perform photographing using the color temperature correction data stored in advance, but the photographer can arbitrarily adjust the spectral characteristics of the photographing lens unit under various conditions. It is difficult to create appropriate and accurate color temperature correction data.
[0011]
The present invention eliminates the above-described problems and provides an interchangeable lens electronic camera system capable of performing a good white balance adjustment using any interchangeable lens. It is an object of the present invention to provide an electronic camera system capable of creating color temperature correction data corresponding to the spectral characteristics of a lens unit.
[0012]
[Means for Solving the Problems]
The present invention has achieved the above object by the following technical configuration.
[0013]
(1) In an electronic camera system having an interchangeable photographing lens unit and an image sensor that photoelectrically converts a subject image formed through the photographing lens unit,
First white balance calculation means for obtaining a first white balance control signal for white balance adjustment using data from a colorimetric sensor other than the image sensor;
Second white balance calculation means for obtaining a second white balance control signal for white balance adjustment using data from a signal obtained from an image sensor through the photographing lens unit;
By comparing the first white balance control signal obtained by the first white balance calculation means with the second white balance control signal obtained by the second white balance calculation means, the first white balance control signal and the second white balance control signal are obtained. Color temperature correction data calculating means for calculating the color temperature correction data of
A white balance control unit that controls white balance adjustment based on the first white balance control signal, the second white balance control signal, and the color temperature correction data;
An electronic camera system comprising: a color temperature correction data storage unit that stores the color temperature correction data.
[0014]
(2) The electronic camera system according to item (1), wherein the color temperature correction data storage unit stores color temperature correction data unique to a plurality of interchangeable photographing lens units.
[0015]
(3) The color temperature correction data calculation means acquires lens information from the interchangeable photographing lens unit, and attaches lens information of the photographing lens unit to the color temperature correction data. An electronic camera system according to item 1.
[0016]
(4) The electronic camera system according to the above (1), further comprising a color temperature correction data use selecting unit capable of selecting whether to use the color temperature correction data for white balance control.
[0017]
(5) The electronic camera system according to the above (1), further comprising image information recording means for attaching the color temperature correction data to a captured image.
[0018]
(6) If the color temperature correction data of the replaceable photographing lens unit mounted on the electronic camera is not stored in the color temperature correction data storage means, the color temperature correction data of the replaceable photographing lens unit is The electronic camera system according to item (1), further comprising a warning unit that uses color temperature correction data to warn that the data is not stored.
[0019]
(7) The use of the color temperature correction data is selected by the color temperature correction data use selection means, and the color temperature correction data of the interchangeable photographing lens unit mounted on the electronic camera is stored in the color temperature correction data storage means. The color temperature correction data use warning means for warning that the color temperature correction data of the interchangeable photographing lens unit is not stored when the color temperature correction data is not stored is provided. Electronic camera system as described.
[0020]
(8) An electronic camera system including: an interchangeable photographing lens unit including a color temperature correction data storage unit; and an image pickup device that photoelectrically converts a subject image formed through the photographing lens unit.
First white balance calculating means for obtaining a first white balance control signal for white balance adjustment using data from a colorimetric sensor other than the image sensor; and a first white balance calculating means for obtaining a first white balance control signal from the image sensor through the photographing lens unit. Second white balance calculating means for obtaining a second white balance control signal for white balance adjustment using the data,
By comparing the first white balance control signal obtained by the first white balance calculation means with the second white balance control signal obtained by the second white balance calculation means, the first white balance control signal and the second white balance control signal are obtained. Color temperature correction data calculating means for calculating the color temperature correction data of
A white balance control unit that controls white balance adjustment based on the first white balance control signal, the second white balance control signal, and the color temperature correction data;
The electronic camera system according to claim 1, wherein the color temperature correction data is stored in the color temperature correction data storage unit.
[0021]
(9) The electronic camera system according to (8), further including a color temperature correction data use selecting unit capable of selecting whether to use the color temperature correction data for white balance control.
[0022]
(10) If the color temperature correction data of the replaceable photographing lens unit mounted on the electronic camera is not stored in the color temperature correction data storage means, the color temperature correction data of the replaceable photographing lens unit is The electronic camera system according to the above mode (8), further comprising a color temperature correction data use warning unit that warns that the image data is not stored.
[0023]
(11) The use of the color temperature correction data is selected by the color temperature correction data use selection means, and the color temperature correction data of the interchangeable photographing lens unit mounted on the electronic camera is stored in the color temperature correction data storage means. The color temperature correction data use warning means for warning that the color temperature correction data of the interchangeable photographing lens unit is not stored when the color temperature correction data is not stored is provided. Electronic camera system as described.
[0024]
The lens information in the above item (3) is, for example, identification information such as a unique number or management information.
[0025]
According to the configuration of the above item (1), the photographer can create color temperature correction data corresponding to the spectral characteristic unique to the interchangeable photographing lens unit mounted on the electronic camera, and what photographing lens unit is Even if the camera is attached to the camera, excellent white balance adjustment can be performed by using the color temperature correction data unique to the photographing lens unit created by the photographer. In addition, it is possible to store the created color temperature correction data unique to the photographing lens unit in the electronic camera.
[0026]
According to the configuration of the above item (2), it is possible to store the color temperature correction data unique to the photographing lens unit other than the photographing lens unit attached to the electronic camera at the time of photographing in the electronic camera.
[0027]
With the configuration of the above item (3), it is possible to easily identify which photographing lens unit is the color temperature correction data unique to the interchangeable photographing lens unit obtained by the color temperature correction data calculating means. It becomes possible.
[0028]
According to the configuration of the above item (4), it is possible to select whether or not to use the color temperature correction data unique to the mounted photographing lens unit for photographing.
[0029]
According to the configuration of the above item (5), it is possible to attach color temperature correction data unique to the interchangeable photographing lens unit used in the photographing as image information to the photographed image.
[0030]
According to the configuration of the above item (6), it is possible to warn the photographer when the color temperature correction data unique to the mounted photographing lens unit is not stored in the electronic camera.
[0031]
According to the configuration of the above item (7), the color temperature correction data of the photographic lens unit attached to the electronic camera is stored in the electronic camera even though the photographer has selected the shooting mode using the color temperature correction data. If not, it is possible to warn the photographer that the color temperature correction data of the interchangeable photographing lens unit is not stored.
[0032]
According to the configuration of the item (8), the photographer can create the color temperature correction data corresponding to the spectral characteristic unique to the interchangeable photographing lens unit mounted on the electronic camera. Even if the camera is attached to the camera, excellent white balance adjustment can be performed by using the color temperature correction data unique to the photographing lens unit created by the photographer. Further, the created color temperature correction data unique to the photographing lens unit can be stored in the photographing lens unit.
[0033]
With the configuration of the item (9), it is possible to select whether or not to use the color temperature correction data unique to the mounted photographing lens unit for photographing.
[0034]
According to the configuration of the above item (10), when there is no color temperature correction data in the mounted interchangeable photographing lens unit, it is possible to warn the photographer.
[0035]
According to the configuration of the above item (11), when the photographer selects the photographing mode using the color temperature correction data, but the color temperature correction data is not stored in the attached photographing lens unit, the photographing is performed. It is possible to warn the user that color temperature correction data of the interchangeable photographing lens unit is not stored.
[0036]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0037]
(First embodiment)
First, a first embodiment will be described with reference to FIGS.
[0038]
FIG. 1 shows a schematic diagram of the present invention.
[0039]
100 is an electronic camera body.
[0040]
Reference numeral 151 denotes a colorimetric sensor that measures the color temperature of external light.
[0041]
Reference numeral 300 denotes an interchangeable photographing lens unit (hereinafter, also referred to as a lens unit).
[0042]
FIG. 2 is a block diagram showing a first embodiment of the present invention.
[0043]
In FIG. 2, reference numeral 12 denotes a shutter for controlling the amount of exposure to the image sensor 14, and reference numeral 14 denotes an image sensor for converting an optical image into an electric signal.
[0044]
The light beam incident on the lens 310 is guided through the stop 312, the lens mounts 306 and 106, the mirror 130, and the shutter 12 by a single-lens reflex method, and can be formed on the image sensor 14 as an optical image.
[0045]
Reference numerals 130 and 132 denote mirrors, which can guide light rays incident on the lens 310 to the optical viewfinder 104 by a single-lens reflex method.
[0046]
Note that the mirror 130 may have either a quick return mirror configuration or a half mirror configuration.
[0047]
Reference numeral 16 denotes an A / D converter that converts an analog signal output of the image sensor 14 into a digital signal.
[0048]
Reference numeral 18 denotes a timing generation circuit that supplies a clock signal and a control signal to the image sensor 14, the A / D converter 16, and the D / A converter 26, and is controlled by the memory control circuit 22 and the system control circuit 50.
[0049]
Reference numeral 20 denotes an image processing circuit which performs predetermined pixel interpolation processing and color conversion processing on data from the A / D converter 16 or data from the memory control circuit 22.
[0050]
Further, the image processing circuit 20 performs a predetermined calculation process using the captured image data as necessary, and the system control circuit 50 causes the exposure control unit 40 and the distance measurement control unit 42 to perform, based on the obtained calculation result. TTL (through-the-lens) type AF (auto-focus) processing, AE (auto-exposure) processing, and EF (flash dimming) processing, which perform control for the flash memory, can be performed.
[0051]
Further, the image processing circuit 20 also performs WB (white balance) processing based on the calculation result obtained from the white balance control circuit 156.
[0052]
A memory control circuit 22 controls the A / D converter 16, the timing generation circuit 18, the image processing circuit 20, the image display memory 24, the D / A converter 26, the memory 30, and the compression / decompression circuit 32.
[0053]
The data of the A / D converter 16 is written to the image display memory 24 or the memory 30 via the image processing circuit 20 and the memory control circuit 22, or the data of the A / D converter 16 is directly written via the memory control circuit 22. It is.
[0054]
Reference numeral 24 denotes an image display memory, 26 denotes a D / A converter, and 28 denotes an image display unit composed of a TFT / LCD or the like. The display image data written in the image display memory 24 is transmitted to the D / A converter 26. The image is displayed by the image display unit 28 via the display.
[0055]
The electronic viewfinder function can be realized by sequentially displaying captured image data using the image display unit 28.
[0056]
In addition, the image display unit 28 can arbitrarily turn on / off the display according to an instruction from the system control circuit 50. When the display is turned off, the power consumption of the electronic camera body 100 can be significantly reduced. Can be done.
[0057]
Reference numeral 30 denotes a memory for storing the photographed still images and moving images, and has a sufficient storage capacity for storing a predetermined number of still images and a moving image for a predetermined time.
[0058]
Accordingly, even in the case of continuous shooting or panoramic shooting in which a plurality of still images are continuously shot, it is possible to write a large amount of images to the memory 30 at high speed.
[0059]
The memory 30 can also be used as a work area of the system control circuit 50.
[0060]
Reference numeral 32 denotes a compression / decompression circuit for compressing / decompressing image data by adaptive discrete cosine transform (ADCT) or the like. The compression / decompression circuit 32 reads an image stored in the memory 30 to perform compression or decompression processing, and stores the processed data in the memory. Write 30.
[0061]
Reference numeral 40 denotes a shutter control unit that controls the shutter 12 in cooperation with an aperture control unit 340 that controls the aperture 312 based on photometric information from the photometric unit 46.
[0062]
Reference numeral 42 denotes a distance measuring unit for performing an AF (auto focus) process, which converts a light beam incident on the lens 310 into a diaphragm 312, lens mounts 306 and 106, a mirror 130, and a distance measuring device (not shown) by a single-lens reflex method. By injecting the light into the distance measuring means 42 via the sub-mirror, the in-focus state of the image formed as an optical image can be measured.
[0063]
Reference numeral 46 denotes a photometric unit for performing an AE (automatic exposure) process, and converts the light beam incident on the lens 310 into a stop 312, lens mounts 306 and 106, mirrors 130 and 132, and a photometric device (not shown) by a single-lens reflex method. By allowing the light to enter the photometric means 46 via a lens, the exposure state of the image formed as an optical image can be measured.
[0064]
The light metering means 46 also has an EF (flash light control) processing function in cooperation with the flash 48.
[0065]
Reference numeral 48 denotes a flash, which also has a function of projecting AF auxiliary light and a function of flash light control.
[0066]
The system control circuit 50 controls the shutter control unit 40, the aperture control unit 340, and the distance measurement control unit 342 based on the calculation result obtained by calculating the image data captured by the image sensor 14 by the image processing circuit 20. Exposure control and AF (autofocus) control can also be performed using the video TTL method.
[0067]
Further, AF (autofocus) control may be performed using both the measurement result by the distance measuring unit 42 and the calculation result obtained by calculating the image data captured by the image sensor 14 by the image processing circuit 20.
[0068]
Then, the exposure control may be performed by using both the measurement result by the photometry unit 46 and the calculation result obtained by calculating the image data captured by the image sensor 14 by the image processing circuit 20.
[0069]
Reference numeral 50 denotes a system control circuit that controls the entire electronic camera main body 100, which is image information recording means. Reference numeral 52 denotes a memory that stores constants, variables, programs, and the like for operation of the system control circuit 50.
[0070]
The system control circuit 50 can also attach the color temperature correction data to the captured image.
[0071]
Reference numeral 54 denotes a display unit such as a liquid crystal display device, a speaker, or the like that displays an operation state, a message, or the like using characters, images, sounds, or the like in accordance with execution of a program in the system control circuit 50. A single or a plurality of them are installed at positions near the operation unit where they are easily visible, and are configured by a combination of, for example, an LCD, an LED, and a sound generating element.
[0072]
The display unit 54 has a part of its functions installed in the optical viewfinder 104.
[0073]
Among the display contents of the display unit 54, those displayed on the LCD or the like include, for example, a single shot / continuous shooting display, a self-timer display, a compression ratio display, a recording pixel number display, a recording number display, and a remaining number of images displayable. , Shutter speed display, Aperture value display, Exposure compensation display, Flash display, Red-eye reduction display, Macro shooting display, Buzzer setting display, Clock battery remaining display, Battery remaining display, Error display, Multi-digit information display Display of the attachment / detachment state of the recording media 200 and 210, attachment / detachment state display of the lens unit 300, communication I / F operation display, date / time display, display indicating the connection state with the external computer, and the like.
[0074]
In addition, among the display contents of the display unit 54, those displayed in the optical viewfinder 104 include, for example, an in-focus display, a shooting ready display, a camera shake warning display, a flash charging display, a flash charging completed display, a shutter speed display, There are an aperture value display, an exposure correction display, a recording medium writing operation display, and the like.
[0075]
Further, among the display contents of the display unit 54, those displayed on the LED or the like include, for example, an in-focus display, a shooting ready display, a camera shake warning display, a flash charging display, a flash charging completed display, a recording medium writing operation display, There are a macro shooting setting notification display, a secondary battery charging state display, and the like.
[0076]
Among the display contents of the display unit 54, the one displayed on a lamp or the like includes, for example, a self-timer notification lamp. This self-timer notification lamp may be used in common with the AF auxiliary light.
[0077]
Reference numeral 56 denotes an electrically erasable and recordable nonvolatile memory, for example, an EEPROM or the like.
[0078]
Reference numerals 60, 62, 64, 66, 68, 70, and 72 denote operating means for inputting various operation instructions of the system control circuit 50, such as switches, dials, touch panels, pointing by gaze detection, and voice recognition devices. It is composed of one or a plurality of combinations.
[0079]
Here, these operation means will be specifically described.
[0080]
Reference numeral 60 denotes a mode dial switch, which includes an automatic shooting mode, a program shooting mode, a shutter speed priority shooting mode, an aperture priority shooting mode, a manual shooting mode, a depth of focus priority (depth) shooting mode, a portrait shooting mode, a landscape shooting mode, and a close-up shooting mode. Each function photographing mode such as a mode, a sport photographing mode, a night scene photographing mode, a panoramic photographing mode and the like can be switched and set.
[0081]
Reference numeral 62 denotes a shutter switch SW1, which is turned on during the operation of a shutter button (not shown) to perform operations such as AF (auto focus) processing, AE (auto exposure) processing, WB (white balance) processing, and EF (flash light control) processing. Instruct to start.
[0082]
Reference numeral 64 denotes a shutter switch SW2 which is turned on when the operation of a shutter button (not shown) is completed, and writes a signal read from the image sensor 12 into the memory 30 via the A / D converter 16 and the memory control circuit 22 in an exposure process. A development process using an operation in the image processing circuit 20 or the memory control circuit 22; a recording process in which image data is read from the memory 30, compressed by the compression / decompression circuit 32, and written into the recording medium 200 or 210. Instructs the start of a series of processing operations.
[0083]
Reference numeral 66 denotes a color temperature correction data registration switch, which instructs the start of a shooting sequence for calculating color temperature correction data unique to the lens unit 300 mounted by the color temperature correction data calculation circuit 155.
[0084]
Reference numeral 68 denotes a color temperature correction mode switch, which is a color temperature correction data use selection unit, and instructs shooting using color temperature correction data unique to the mounted lens unit 300 calculated by the color temperature correction data calculation circuit 155.
[0085]
Reference numeral 70 denotes a color temperature correction data selection switch for selecting arbitrary color temperature correction data from a plurality of color temperature correction data stored in the color temperature correction data storage unit 157.
[0086]
Reference numeral 72 denotes a white balance selection switch, which is an external sensor method using color temperature data obtained by measuring the color of external light, and a TTL which uses the color temperature data to calculate the color of external light from an output signal of an image sensor. The photographer determines the type of light source (for example, sunlight, light bulb, fluorescent light, etc.) in the shooting environment, and selects the type of light source using light source selection means (not shown). Or the photographer measures the color tone (color temperature) of the photographing environment, inputs the color temperature of the photographing environment to the electronic camera by the color temperature input means, and selects a light source according to the selection of the light source and the input of the color temperature. And the gain of the blue signal circuit are selected from a preset white light source and a manual white balance set to a fixed gain specific to the color temperature.
[0087]
An operation unit 74 includes various buttons, a touch panel, and the like. A menu button, a set button, a macro button, a multi-screen playback page break button, a flash setting button, a single-shot / continuous-shot / self-timer switching button, and a menu shift + (plus ) Button, menu shift-(minus) button, playback image shift + (plus) button, playback image-(minus) button, shooting image quality selection button, exposure compensation button, date / time setting button, panorama mode shooting and playback A selection / switching button for setting selection and switching of various functions when executing, a determination / execution button for setting and executing various functions when executing shooting and playback in a panoramic mode and the like, and an image display unit 28. Image display ON / OFF switch for setting ON / OFF, image data shot immediately after shooting A quick review ON / OFF switch for setting a quick review function for automatically playing back a signal, and a switch for selecting a compression ratio of JPEG compression or a CCDRAW mode for digitizing an image sensor signal as it is and recording it on a recording medium. When a certain compression mode switch, playback mode, multi-screen playback / deletion mode, PC connection mode, etc., a playback switch and a shutter switch SW1 are pressed, auto focus operation starts and focus is once achieved. Then, there is an AF mode setting switch that can set a one-shot AF mode that keeps the in-focus state and a servo AF mode that keeps auto-focus operation continuously while the shutter switch SW1 is pressed.
[0088]
The functions of the plus button and the minus button are provided with a rotary dial switch, so that it is possible to more easily select a numerical value and a function.
[0089]
Reference numeral 76 denotes a power switch, which can switch and set the power on and power off modes of the electronic camera body 100. In addition, power on and power off of various accessory devices such as the lens unit 300 connected to the electronic camera body 100, an external strobe (not shown), and the recording media 200 and 210 can be switched and set.
[0090]
Reference numeral 80 denotes a power control unit, which includes a battery detection circuit, a DC-DC converter, a switch circuit for switching a block to be energized, and the like. The DC-DC converter is controlled based on an instruction from the system control circuit 50, and a required voltage is supplied to each unit including a recording medium for a required period.
[0091]
Reference numeral 82 denotes a connector, 84 denotes a connector, and 86 denotes a power supply unit including a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, and an AC adapter.
[0092]
90 and 94 are interfaces with a recording medium such as a memory card or a hard disk, 92 and 96 are connectors for connecting to a recording medium such as a memory card or a hard disk, and 98 is a recording medium 200 or 210 on the connector 92 and / or 96. Is a recording medium attachment / detachment detecting means for detecting whether or not the medium is attached.
[0093]
In this embodiment, the description has been made assuming that there are two systems of interfaces and connectors for attaching a recording medium. Of course, the interface and the connector for attaching the recording medium may have a single or plural number of systems. Further, a configuration may be employed in which interfaces and connectors of different standards are provided in combination.
[0094]
The interface and the connector may be configured using a standard such as a PCMCIA card or a CF (Compact Flash (R)) card.
[0095]
Furthermore, when the interfaces 90 and 94 and the connectors 92 and 96 are configured using a standard such as a PCMCIA card or a CF (Compact Flash (R)) card, a LAN card, a modem card, a USB card, an IEEE 1394 card By connecting various communication cards such as a P1284 card, a SCSI card, a communication card such as a PHS, and the like, image data and management information attached to the image data can be transferred to and from other peripheral devices such as a computer and a printer. Can fit.
[0096]
Reference numeral 104 denotes an optical finder, which guides a light beam incident on the lens 310 through a stop 312, lens mounts 306 and 106, and mirrors 130 and 132 by a single-lens reflex method, and can form and display an optical image. Thus, it is possible to perform photographing using only the optical viewfinder 104 without using the electronic viewfinder function of the image display unit 28. In the optical viewfinder 104, some functions of the display unit 54, for example, an in-focus display, a camera shake warning display, a flash charge display, a shutter speed display, an aperture value display, an exposure correction display, and the like are provided.
[0097]
A communication unit 110 has various communication functions such as RS232C, USB, IEEE1394, P1284, SCSI, modem, LAN, and wireless communication.
[0098]
Reference numeral 112 denotes a connector for connecting the electronic camera body 100 to another device by the communication unit 110 or an antenna in the case of wireless communication.
[0099]
Reference numeral 120 denotes an interface for connecting the electronic camera body 100 to the lens unit 300 in the lens mount 106; 122, a connector for electrically connecting the electronic camera body 100 to the lens unit 300; Alternatively, it is a lens attachment / detachment detection unit that detects whether the lens unit 300 is attached to the connector 122.
[0100]
The connector 122 has a function of transmitting a control signal, a status signal, a data signal, and the like between the electronic camera body 100 and the lens unit 300 and supplying currents of various voltages. Further, the connector 122 may be configured to transmit not only electric communication but also optical communication, voice communication, and the like.
[0101]
The colorimetric sensor 151 measures external light color in order to adjust the white balance of the captured image.
[0102]
Reference numeral 152 denotes an A / D converter that converts an analog signal output of the colorimetric sensor 151 into a digital signal.
[0103]
Reference numeral 153 denotes an externally measured white balance calculating circuit, which is a first white balance calculating means, which receives an output from the white balance A / D circuit 56 and generates a first white balance control signal as a color temperature of external light (externally measured white light). Color temperature).
[0104]
Reference numeral 154 denotes an internal measurement white balance calculation circuit, which is a second white balance calculation unit, which calculates a color temperature (internal color measurement temperature) as a second white balance control signal using image data captured by the TTL method.
[0105]
Reference numeral 155 denotes a color temperature correction data calculation circuit which is color temperature correction data calculation means. The external color temperature calculated by the external measurement white balance calculation circuit 153 and the internal color measurement temperature calculated by the internal measurement white balance calculation circuit 154. , Color temperature correction data corresponding to the spectral characteristic unique to the mounted lens unit 300 is calculated.
[0106]
Reference numeral 156 denotes a white balance control circuit, which is white balance control means. The white balance adjustment gain is set in advance in accordance with the photographer's selection of the light source and the color temperature input. The image processing circuit 20 performs white balance processing based on the colorimetric temperature, the internal colorimetric temperature calculated by the internal measurement white balance calculation circuit 154, the color temperature correction data calculated by the color temperature correction data calculation circuit 155, and the like. Calculate the white balance correction data necessary to perform the correction.
[0107]
Reference numeral 157 denotes a color temperature correction data storage unit that stores a plurality of color temperature correction data specific to the mounted lens unit 300 and various types of lens information of the lens unit 300 corresponding to the color temperature correction data of the lens unit 300.
[0108]
Reference numeral 158 denotes a color temperature correction data use warning unit (hereinafter, also referred to as a warning unit) which stores the color temperature correction data when the photographing method using the color temperature correction data is selected by the color temperature correction mode switch 68. Check whether color temperature correction data unique to the lens unit 300 attached to the means 157 is stored. If the color temperature correction data is not stored and shooting using the color temperature correction data is impossible, Alerts the photographer by the display unit 54 that the color temperature correction data cannot be used.
[0109]
Reference numeral 200 denotes a recording medium such as a memory card or a hard disk.
[0110]
The recording medium 200 includes a recording unit 202 including a semiconductor memory or a magnetic disk, an interface 204 with the electronic camera main body 100, and a connector 206 for connecting to the electronic camera main body 100.
[0111]
210 is a recording medium such as a memory card or a hard disk.
[0112]
The recording medium 210 includes a recording unit 212 composed of a semiconductor memory, a magnetic disk, or the like, an interface 214 with the electronic camera body 100, and a connector 216 for connecting to the electronic camera body 100.
[0113]
A lens mount 306 mechanically couples the lens unit 300 with the electronic camera body 100. Various functions for electrically connecting the lens unit 300 to the electronic camera body 100 are included in the lens mount 306.
[0114]
Reference numeral 310 denotes a photographing lens, and 312 denotes an aperture.
[0115]
Reference numeral 320 denotes an interface for connecting the lens unit 300 to the electronic camera main body 100 in the lens mount 306, and reference numeral 322 denotes a connector for electrically connecting the lens unit 300 to the electronic camera main body 100.
[0116]
The connector 322 transmits a control signal, a status signal, a data signal, and the like between the electronic camera body 100 and the lens unit 300, and has a function of supplying or supplying a current of various voltages. Further, the connector 322 may be configured to transmit not only electric communication but also optical communication, voice communication, and the like.
[0117]
Reference numeral 340 denotes an aperture control unit that controls the aperture 312 in cooperation with the shutter control unit 40 that controls the shutter 12 based on photometric information from the photometric unit 46.
[0118]
Reference numeral 342 denotes a distance measurement control unit that controls focusing of the photographing lens 310, and 344 denotes a zoom control unit that controls zooming of the photographing lens 310.
[0119]
Reference numeral 350 denotes a lens system control circuit that controls the entire lens unit 300. The lens system control circuit 350 includes a memory for storing operation constants, variables, programs, and the like, identification information such as a number unique to the lens unit 300, management information, function information such as an open aperture value and a minimum aperture value, and a focal length. It also has a function of a non-volatile memory for storing current and past set values.
[0120]
FIG. 3 shows a flowchart for creating the color temperature correction data of the mounted lens.
[0121]
First, in step S101, when the color temperature correction data registration switch 66 is turned on, the mode is changed to a color temperature correction data generation mode for generating color temperature correction data specific to the lens unit 300 mounted on the electronic camera body 100.
[0122]
In step S102, when the shutter switch SW1 (62) is turned on, in step S103, colorimetry of external light is performed by the colorimetric sensor 151, and the analog output from the colorimetric sensor 151 is output by the A / D circuit 152. The red signal R converted from a digital signal and obtained from the colorimetric sensor 151 ₁ And green light B ₁ , The external temperature white balance calculation circuit 153 calculates the color temperature of external light as R ₁ / G ₁ And B ₁ / G ₁ Get.
[0123]
In step S104, when the shutter switch SW2 (64) is turned on, in step S105, the photographer photographs a predetermined blank sheet.
[0124]
In step S106, the image sensor 14 receives the light transmitted through the mounted lens unit 300, converts an analog signal output from the image sensor 14 into a digital signal by the A / D converter 16, and outputs the signal from the image sensor 14. Red signal R obtained ₂ And green light B ₂ , The color temperature of the external light transmitted through the lens unit 300 by the internal measurement white balance calculation circuit 154 is represented by R ₂ / G ₂ And B ₂ / G ₂ Get.
[0125]
In step 107, the color temperature R of the external light obtained by the external measurement white balance calculation circuit 153 ₁ / G ₁ And B ₁ / G ₁ And the color temperature R of the external light transmitted through the lens unit 300 and obtained by the internal measurement white balance calculation circuit 154. ₂ / G ₂ And B ₂ / G ₂ Accordingly, the color temperature correction data calculation circuit 155 calculates the color temperature correction data R corresponding to the spectral characteristics unique to the lens unit 300. ₃ / G ₃ And B ₃ / G ₃ Is calculated.
[0126]
In step 108, the color temperature correction data R unique to the lens unit 300 obtained from the color temperature correction data calculation circuit 155. ₃ / G ₃ And B ₃ / G ₃ Is stored in the color temperature correction data storage unit 157 together with identification information such as a unique number of the lens unit 300 obtained from the lens system control circuit 350 of the lens unit 300 and management information.
[0127]
FIG. 4 shows a flowchart of photographing using the color temperature correction data unique to the mounted lens unit 300.
[0128]
First, in step S201, when the shutter switch SW1 (62) is turned on, in step S202, it is determined whether the white balance processing is an automatic white balance or a manual white balance by operating the white balance selection switch 72.
[0129]
If the automatic white balance has been selected, in step S203, the colorimetric sensor 151 measures the color of the external light, and outputs the analog signal from the colorimetric sensor 151 to the digital signal by the A / D converter 152. The external measurement white balance calculation circuit 153 calculates the gain of the external measurement white balance adjustment from the ratio of the red signal R and the blue signal B obtained by converting the signal into a signal and obtaining from the colorimetric sensor 151.
[0130]
When the shutter switch SW2 (64) is turned on in step S204, image data is accumulated in the image sensor 14 in step S205.
[0131]
In step S206, the output of the analog signal from the image sensor 14 is converted to a digital signal by the A / D converter 16, and the internal measurement white balance is calculated from the ratio of the red signal R and the blue signal B obtained from the captured image data. The gain of the internal measurement white balance adjustment is calculated by the circuit 154.
[0132]
In step S209, the white balance control circuit 156 stores color temperature correction data based on identification information such as a unique number of the lens unit 300 obtained from the lens system control circuit 350 of the mounted lens unit 300 and various information such as management information. The color temperature correction data unique to the mounted lens unit 300 is read from the means 157.
[0133]
In step S210, the white balance control circuit 156 corrects the white balance of the captured image calculated based on the external measurement white balance adjustment gain, the internal measurement white balance gain, and the color temperature correction data unique to the attached lens unit 300. The value is sent to the image processing circuit 20, and the white balance of the captured image is adjusted.
[0134]
In step S211, the color temperature correction data unique to the attached lens unit 300 is stored in the storage unit 202 and the recording unit 212 together with the image data as various types of photographing information accompanying the photographed image.
[0135]
If the manual white balance has been selected by operating the white balance selection switch 72 in step S202, and if the shutter switch SW2 (64) is turned on in step S207, the image data is stored in the image sensor 14 in step S208. The stored analog signal output from the image sensor 14 is converted to a digital signal by the A / D converter 16.
[0136]
In step S209, the white balance control circuit 156 stores color temperature correction data based on identification information such as a unique number of the lens unit 300 obtained from the lens system control circuit 350 of the mounted lens unit 300 and various information such as management information. The color temperature correction data unique to the mounted lens unit 300 is read by the means 157.
[0137]
In step S210, the white balance control circuit 156 determines the white balance adjustment gain stored in advance according to the type of light source and the color temperature input arbitrarily input by the photographer using the white balance selection switch (72). The correction value of the white balance processing of the photographed image calculated based on the color temperature correction data of the mounted lens unit 300 is sent to the image processing circuit 20, and the image processing circuit 20 performs white balance adjustment of the photographed image.
[0138]
In step S211, the color temperature correction data unique to the mounted lens unit 300 is stored in the storage medium 27 together with the image data as various types of photographing information accompanying the photographed image.
[0139]
FIG. 5 shows a lens unit 300 in which color temperature correction data is not stored in the color temperature data storage means 157, or a lens system control circuit 350 in which identification information such as a unique number of the lens unit 300 and various lens information such as management information are stored. 9 shows a flowchart of a color temperature data selection and a warning operation when the lens unit 300 having no is mounted on the electronic camera main body 100.
[0140]
First, in step S301, when the color temperature correction mode switch 68 is turned on, in step S302, the white balance control circuit 157 outputs identification information such as a unique number of the lens unit 300 from the lens system control circuit 350 of the mounted lens unit 300. Read various lens information such as management information.
[0141]
If various lens information can be obtained, the process proceeds to S303, and if not, the process proceeds to S304.
[0142]
In step S303, the white balance control circuit 156 determines a color temperature based on identification information such as a unique number of the lens unit 300 and various lens information such as management information obtained from the lens system control circuit 350 of the attached lens unit 300. The color temperature correction data unique to the mounted lens unit 300 is searched from the correction data storage unit 157.
[0143]
If the color temperature correction data unique to the mounted lens unit 300 is stored in the color temperature correction data storage unit 157 in step S303, the photographer determines in step S307 the color temperature correction data specific to the mounted lens unit. , And the sequence shifts to a shooting sequence using color temperature correction data unique to the mounted lens unit 300 in FIG. 4 (A).
[0144]
If the color temperature correction data of the mounted lens unit 300 has not been stored in the color temperature correction data storage unit 157 in step S303, the photographer uses the mounted lens unit 300 and uses the mounted lens unit 300. Since shooting using the unique color temperature correction data cannot be performed, a warning is issued by the warning unit 158 in step S306, and the photographer is displayed on the display unit 54 that the color temperature correction data cannot be used.
[0145]
If it is determined in step S302 that the lens system control circuit 350 of the attached lens unit 300 cannot obtain identification information such as a unique number of the lens unit 300 and various lens information such as management information, in step S304, the color temperature correction is performed. The data use warning unit 158 warns the photographer that the color temperature correction data could not be retrieved and displays it on the display unit 54.
[0146]
In step S305, if the photographer has arbitrarily selected the color temperature correction data of the attached lens unit 300 by the color temperature correction data selection switch (70) from the color temperature correction data recording unit 157, the photographing is performed in step 307. The user can perform shooting using the color temperature correction data unique to the mounted lens unit 300, and shifts to the flowchart of FIG. 4 for shooting using the color temperature correction data unique to the mounted lens unit 300 (A).
[0147]
(Second embodiment)
Next, a second embodiment will be described with reference to FIGS.
[0148]
FIG. 6 is a block diagram showing a second embodiment of the present invention.
[0149]
The description of the same components as those in the first embodiment will be omitted, and the features of the configuration in the second embodiment will be described.
[0150]
Reference numeral 400 denotes an electronic camera body according to the second embodiment.
[0151]
Reference numeral 500 denotes an interchangeable lens type photographing lens unit (hereinafter, also referred to as a lens unit) including the color temperature correction data storage unit 560 in the second embodiment.
[0152]
A color temperature correction data storage unit 560 stores the color temperature correction data unique to the lens unit 500 calculated by the color temperature correction data calculation circuit 155.
[0153]
FIG. 7 shows a flowchart for creating color temperature correction data of the mounted lens unit.
[0154]
First, in step S401, when the color temperature correction data registration switch 66 is turned on, the mode is changed to a color temperature correction data generation mode for generating color temperature correction data specific to the lens unit 500 mounted on the electronic camera body 400.
[0155]
In step S402, when the shutter switch SW1 (62) is turned on, in step S403, colorimetry of external light is performed by the colorimetric sensor 151, and the analog output from the colorimetric sensor 151 is output by the A / D circuit 152. The red signal R converted from a digital signal and obtained from the colorimetric sensor 151 ₁ And green light B ₁ , The external temperature white balance calculation circuit 153 calculates the color temperature of external light as R ₁ / G ₁ And B ₁ / G ₁ Get.
[0156]
When the shutter switch SW2 (64) is turned on in step S404, the photographer photographs a predetermined blank sheet in step S405.
[0157]
In step S406, the image sensor 14 receives the light transmitted through the mounted lens unit 500, converts an analog signal output from the image sensor 14 into a digital signal by the A / D converter 16, and outputs the signal from the image sensor 14. Obtained red signal R ₂ And green light B ₂ , The color temperature of the external light transmitted through the lens unit 500 by the internal measurement white balance calculation circuit 154 is represented by R ₂ / G ₂ And B ₂ / G ₂ Get.
[0158]
In step 407, the color temperature R of the external light obtained by the external measurement white balance calculation circuit 153. ₁ / G ₁ And B ₁ / G ₁ And the color temperature R of the external light transmitted through the lens unit 500 and obtained by the internal measurement white balance calculation circuit 154. ₂ / G ₂ And B ₂ / G ₂ Accordingly, the color temperature correction data calculation circuit 155 calculates the color temperature correction data R corresponding to the spectral characteristics unique to the lens unit 500. ₃ / G ₃ And B ₃ / G ₃ Is calculated.
[0159]
In step 408, the color temperature correction data R unique to the lens unit 500 obtained from the color temperature correction data calculation circuit 155. ₃ / G ₃ And B ₃ / G ₃ Is stored in the color temperature correction data storage unit 560.
[0160]
FIG. 8 shows a flowchart of photographing using the color temperature correction data unique to the mounted lens unit 500.
[0161]
First, in step S501, when the shutter switch SW1 (62) is turned on, in step S502, it is determined whether the white balance processing is set to the auto white balance or the manual white balance by operating the white balance selection switch 72. I do.
[0162]
If the automatic white balance has been selected, in step S503, the colorimetric sensor 151 measures the color of the external light, and outputs the analog signal output from the colorimetric sensor 151 to the digital signal by the A / D converter 152. The external measurement white balance calculation circuit 153 calculates the gain of the external measurement white balance adjustment from the ratio of the red signal R and the blue signal B obtained by converting the signal into a signal and obtaining from the colorimetric sensor 151.
[0163]
When the shutter switch SW2 (64) is turned on in step S504, image data is stored in the image sensor 14 in step S505.
[0164]
In step S506, the output of the analog signal from the image sensor 14 is converted into a digital signal by the A / D converter 16, and the internal measurement white balance is calculated from the ratio of the red signal R and the blue signal B obtained from the captured image data. The circuit 154 calculates the gain of the internal measurement white balance adjustment.
[0165]
In step S509, the white balance control circuit 156 reads color temperature correction data unique to the mounted lens unit 500 from the color temperature correction data storage unit 560 of the mounted lens unit 500.
[0166]
In step S510, the white balance control circuit 156 corrects the white balance of the photographed image calculated based on the external measurement white balance adjustment gain, the internal measurement white balance gain, and the color temperature correction data unique to the attached lens unit 500. The values are sent to the image processing circuit 20 to adjust the white balance of the captured image.
[0167]
In step S511, color temperature correction data unique to the mounted lens unit 500 is stored in the storage unit 202 and the recording unit 212 together with the image data as various types of shooting information accompanying the shot image.
[0168]
If the manual white balance has been selected by operating the white balance selection switch 72 in step S502, and if the shutter switch SW2 (64) is turned on in step S507, the image data is stored in the image sensor 14 in step S508. The stored analog signal output from the image sensor 14 is converted to a digital signal by the A / D converter 16.
[0169]
In step S509, the white balance control circuit 156 reads color temperature correction data unique to the mounted lens unit 500 from the color temperature correction data storage unit 560 of the mounted lens unit 500.
[0170]
In step S510, the white balance control circuit 156 determines the white balance adjustment gain stored in advance according to the type of the light source and the color temperature input arbitrarily input by the photographer using the white balance selection switch (72). The correction value of the white balance processing of the photographed image calculated based on the color temperature correction data of the mounted lens unit 500 is sent to the image processing circuit 20, and the image processing circuit 20 performs white balance adjustment of the photographed image.
[0171]
In step S511, color temperature correction data unique to the mounted lens unit 500 is stored in the storage unit 202 and the recording unit 212 together with the image data as various types of shooting information accompanying the shot image.
[0172]
FIG. 9 shows a flowchart of a warning operation when the color temperature correction data is not stored in the color temperature data storage unit 560 of the mounted lens unit 500.
[0173]
First, in step S601, when the color temperature correction mode switch 68 is turned on, in step S602, the white balance control circuit 156 reads the mounted lens unit 500 from the color temperature correction data storage unit 560 of the mounted lens unit 500. Check for unique color temperature correction data.
[0174]
If it is determined in step S602 that the color temperature correction data is stored in the color temperature correction data storage unit 560 specific to the mounted lens unit 500, in step S604, the photographer corrects the color temperature correction specific to the mounted lens unit 500. The photographing using the data becomes possible, and the process proceeds to the flowchart of the photographing using the color temperature correction data unique to the attached lens unit 500 in FIG. 8 (B).
[0175]
In step S602, if the color temperature correction data is not stored in the color temperature correction data storage unit 560 of the mounted lens unit 500, the photographer uses the mounted lens unit 500 and uses the mounted lens unit 500. Since photographing using the unique color temperature correction data cannot be performed, a warning is issued by the warning unit 158 in step S603, and the photographer is displayed on the display unit 54 that the color temperature correction data cannot be used.
[0176]
【The invention's effect】
As described above, according to the present invention,
Provide an electronic camera system that allows interchangeable lenses that can perform good white balance adjustment using any interchangeable lens, and allows the photographer to arbitrarily obtain color temperature correction data corresponding to the spectral characteristics of the photographing lens unit. An electronic camera system capable of performing creation can be provided.
[0177]
That is,
It is not necessary to store color temperature correction data corresponding to the spectral characteristics of the photographing lens unit in the interchangeable photographing lens unit, and any photographing lens unit that can be attached to the electronic camera body is used. The lens unit can also create color temperature correction data, and the photographer obtains an image with good white balance adjustment by performing white balance adjustment using the color temperature correction data of the mounted photographing lens unit. It becomes possible.
[0178]
Also,
In addition to the color temperature correction data of the mounted interchangeable lens, the color temperature correction data of the interchangeable lens that is not mounted can be stored in the electronic camera. It is not necessary to calculate the color temperature correction data every time the lens is mounted, and the electronic camera stores the color temperature correction data of a plurality of interchangeable lenses to be mounted in advance so that the photographer can exchange the photographing lens unit. As soon as is mounted, shooting using the color temperature correction data becomes possible.
[0179]
Also,
When shooting using color temperature correction data, the camera automatically selects the color temperature correction data for the mounted interchangeable shooting lens unit from the color temperature correction data for multiple shooting lens units stored in the electronic camera. It is possible for the photographer to take a photograph without selecting and setting the color temperature correction data of a plurality of photographing lens units stored in the electronic camera.
[0180]
Also,
The photographer can freely select the use of the color temperature correction data of the interchangeable photographing lens unit.
[0181]
Also,
The photographer can obtain information on the color temperature correction data used for white balance adjustment of the photographed image stored in the electronic camera, and the photographer can use the information attached to the photographer when processing the image photographed later. The color temperature correction data of the interchangeable lens can be used.
[0182]
Also,
If the color temperature correction data of the attached interchangeable lens is not stored in the electronic camera in advance, inform the photographer that shooting using the color temperature correction data is not possible, and shoot differently from the photographer's intention Is not performed.
[0183]
Also,
If the photographer attempts to shoot using the color temperature correction data even though the color temperature correction data of the attached interchangeable lens was not stored in the electronic camera in advance, it can be replaced by the photographer It is possible to warn that color temperature correction data of a photographic lens unit is not stored in the electronic camera, and to prevent photographing different from the photographer's intention.
[0184]
Also,
The photographer can create color temperature data corresponding to the spectral characteristics of the interchangeable shooting lens unit attached to the electronic camera, and can adjust the white balance using the color temperature correction data unique to the shooting lens unit. Become. In addition, since the created color temperature correction data unique to the photographing lens unit can be stored in the photographing lens unit, there is no means for storing the color correction data, but the color temperature correction data is used. By mounting a photographing lens unit in which the created color temperature correction data unique to the photographing lens unit is mounted in advance on the electronic camera body capable of performing the photographing, the photographing using the color temperature correction data can be performed.
[0185]
Also,
The photographer can freely select the use of the color temperature correction data of the interchangeable photographing lens unit.
[0186]
Also,
If the color temperature correction data is not stored in advance in the attached interchangeable lens, it informs the photographer that shooting using the color temperature correction data is not possible, and shooting different from the photographer's intention is performed. It is possible to do so.
[0187]
Also,
A photographing lens that can be replaced by the photographer when the photographer attempts to shoot using the color temperature compensation data even though the color temperature compensation data was not stored in advance on the attached interchangeable lens. It is possible to warn that the color temperature correction data of the unit is not stored in the electronic camera, and to prevent the photographing from being performed differently from the intention of the photographer.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an electronic camera system showing an embodiment of the present invention.
FIG. 2 is a block diagram illustrating an internal structure of the electronic camera system according to the first embodiment of the present invention.
FIG. 3 shows a flowchart for creating color temperature correction data of a mounted lens unit 300 in the first embodiment of the present invention.
FIG. 4 shows a flowchart of photographing using the color temperature correction data of the mounted lens unit 300 in the first embodiment of the present invention.
FIG. 5 shows a first embodiment of the present invention including a lens unit 300 in which color temperature correction data is not stored in color temperature data storage means, and a lens system control circuit 350 storing various lens information such as a lens ID. FIG. 9 is a flowchart illustrating a color temperature data selection, a warning operation, and the like when a lens unit 300 that is not mounted is attached to the electronic camera body 100.
FIG. 6 is a block diagram showing an internal structure of an electronic camera system according to a second embodiment of the present invention.
FIG. 7 shows a flowchart for creating color temperature correction data of a mounted lens unit 500 in the second embodiment of the present invention.
FIG. 8 is a flowchart illustrating a photographing process using color temperature correction data unique to the mounted lens unit 500 in the second embodiment of the present invention.
FIG. 9 shows a flowchart of a warning operation when color temperature correction data is not stored in the color temperature data storage means 560 of the attached lens unit 500 in the second embodiment of the present invention. .
[Explanation of symbols]
14 Image sensor
16 A / D converter
20 Image processing circuit
50 System control circuit
54 Display
62 Release shutter switch SW1
64 Release shutter switch SW2
66 Color temperature correction data registration switch
68 Color temperature correction mode switch
70 Color temperature correction data selection switch
72 White balance selection switch
100 Electronic camera body
151 Colorimetric Sensor
152 A / D converter
153 External measurement white balance calculation circuit
154 Internal measurement white balance calculation circuit
155 Color temperature correction data calculation circuit
156 White balance control circuit
157 Color temperature correction data storage means
200 recording medium
210 Recording medium
300 Shooting lens unit
350 Lens system control circuit
400 Electronic camera body
500 shooting lens unit
560 color temperature correction data storage means

Claims (1)

In an electronic camera system having an interchangeable photographing lens unit and an image sensor that photoelectrically converts a subject image formed through the photographing lens unit,
First white balance calculation means for obtaining a first white balance control signal for white balance adjustment using data from a colorimetric sensor other than the image sensor;
Second white balance calculation means for obtaining a second white balance control signal for white balance adjustment using data from a signal obtained from an image sensor through the photographing lens unit;
By comparing the first white balance control signal obtained by the first white balance calculation means with the second white balance control signal obtained by the second white balance calculation means, the first white balance control signal and the second white balance control signal are obtained. Color temperature correction data calculating means for calculating the color temperature correction data of
A white balance control unit that controls white balance adjustment based on the first white balance control signal, the second white balance control signal, and the color temperature correction data;
An electronic camera system comprising: a color temperature correction data storage unit that stores the color temperature correction data.

Images