JP2005051593A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera capable of performing correct exposure control even in pseudo infrared photographing using digital image processing and enabling a user to easily recognize that a present photographing mode is a pseudo infrared photographing mode. <P>SOLUTION: In the pseudo a second infrared photographing mode, a red (R) signal is selected from among subject image pickup signals acquired by an image pickup element 105 by a signal switching circuit 108e (step S6), and the selected signal is integrated in an integration circuit 108f (step S7). Then, exposure operation is performed in a CPU 112 on the basis of this integration value (step S8). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a camera capable of taking a pseudo infrared photo using an image processing technique, and more particularly to exposure control and image display of such a camera.

  Conventionally, a technique called infrared photography is sometimes used for photography under low illumination or dark conditions. Needless to say, this infrared photographing is a photographing technique for photographing using a monochrome film (infrared film) having sensitivity to an infrared component in light incident on the camera. As a result, the subject can be photographed even under low illumination and dark conditions.

  Further, such infrared photographing is also used for photographing long-distance scenery. In this case, not only an infrared component but also a deep red optical filter that removes a short wavelength component in visible light is used in combination. In general, short-wavelength light is easily scattered by fine particles in the air, and as a result of this scattering, landscapes at a long distance become hazy. Although such an effect is called an air fluoroscopic effect, in infrared imaging, the use of the above filter removes short wavelength components below the visible light range, so the influence of such an air fluoroscopic effect is eliminated. Can be taken.

  Non-Patent Document 1 discloses a method for removing such an air fluoroscopic effect at a lower cost and easier than infrared imaging. This is a general-purpose monochrome film (panchromatic monochrome film: panchromatic) having sensitivity over the entire visible light region (and therefore also in the red region) and a dark red optical filter that removes short wavelength components from incident light. The combination is used for imaging (hereinafter, such an imaging technique is referred to as pseudo infrared imaging). According to pseudo-infrared imaging, a monochrome image with high contrast can be obtained that is clear and clear to a distant place similar to infrared imaging without using a special film such as an infrared film.

When such a pseudo-infrared imaging technique is applied to a digital camera, a digital image having the same effect as a photograph obtained by pseudo-infrared imaging can be easily generated using digital image processing. Technology can be considered. In this case, the luminance signal is generated using only the red component (R) signal, for example, among the color signals obtained by the digital camera. If an image is generated by such image processing, it is not necessary to use a dark red optical filter.
Issue / catalog of '97 Photo / Video Supplies Show "(Page 190)

  However, in the case where a luminance signal is generated using only an R signal as in pseudo infrared imaging using digital image processing, if the same exposure control as before is performed, the exposure control may not be performed correctly. That is, in the conventional exposure control, the exposure control is performed based on the green (G) component signal among the color signals obtained by the digital camera. Therefore, when the luminance signal is generated only by the R signal component, etc. Correct exposure control cannot be performed.

  When an image generated using pseudo infrared imaging is displayed as it is in an electronic viewfinder (EVF), it is displayed as a monochrome (black and white) image. For this reason, it is difficult for the user to distinguish between the normal monochrome imaging mode and the pseudo infrared imaging mode.

  The present invention has been made in view of the above circumstances, and can perform correct exposure control even in pseudo infrared imaging using digital image processing, and the current imaging mode is a pseudo infrared imaging mode. An object of the present invention is to provide a camera that allows a user to easily recognize the camera.

  In order to achieve the above object, the camera according to the first aspect of the present invention is a photograph obtained by pseudo-infrared effect photographing combining a black and white film having sensitivity to at least a red component and mounting of a dark red optical filter accessory. A pseudo infrared image generating means capable of generating a pseudo infrared image having substantially the same shooting effect as the above without mounting the dark red optical filter accessory, a color shooting mode capable of shooting a color image, and a monochrome image. A first photographing mode including at least one of the monochrome photographing modes capable of photographing the image, and a second photographing mode capable of photographing a pseudo infrared image using the pseudo infrared image generating means. Switching means for switching between the two photographing modes, and exposure control when the photographing mode is switched to the second photographing mode by the switching means. ; And a signal switching means for switching the signal component of interest.

  According to the first aspect, since the signal component that is subject to exposure control is switched during pseudo-infrared imaging, correct exposure control can be performed.

  In order to achieve the above object, the camera according to the second aspect of the present invention is the camera according to the first aspect, wherein the signal switching means is the exposure control target in the second shooting mode. Is switched to the red component of the three additive primary colors RGB.

  According to the second aspect, correct exposure control can be performed by performing exposure control using a red component signal during pseudo-infrared imaging.

  In order to achieve the above object, a camera according to a third aspect of the present invention includes an imaging unit that captures a subject and obtains a subject imaging signal, and each color signal of the subject imaging signal output from the imaging unit. From at least a luminance means, a black-and-white film having sensitivity to at least a red component, and mounting of a dark red optical filter accessory. A pseudo infrared image generating means capable of generating a pseudo infrared image having no dark red optical filter accessory, and the pseudo infrared image is generated by the pseudo infrared image generating means. Exposure control means for performing exposure control as the luminance signal generated by the matrix means as a signal to be subject to exposure control is provided.

  According to the third aspect, it is possible to perform correct exposure control without switching signals.

  In order to achieve the above object, the camera according to the fourth aspect of the present invention is obtained by pseudo-infrared effect photographing combining a black and white film having sensitivity to at least a red component and mounting of a dark red optical filter accessory. A pseudo-infrared image generating means capable of generating a pseudo-infrared image having substantially the same shooting effect as a photograph obtained without attaching the dark red optical filter accessory, and a color image as a shooting mode of the camera. A first photographing mode including at least one of a color photographing mode capable of photographing and a monochrome photographing mode capable of photographing a monochrome image, and a pseudo infrared image is generated using the pseudo infrared image generating means. Switching means for switching between the second shooting mode, which is a shooting mode capable of shooting, differs between the first shooting mode and the second shooting mode. Image display means capable of performing electronic viewfinder display, and the image display means changes the color of the electronic viewfinder display when the shooting mode is switched to the second shooting mode by the switching means. The electronic viewfinder display is performed by shifting to a level that is distinguishable with respect to the color of the electronic viewfinder display in the first photographing mode.

  According to the fourth aspect, in the pseudo infrared imaging mode, the electronic viewfinder display that is different from the normal one is performed so that the photographer can easily recognize that the current imaging mode is the pseudo infrared imaging mode.

  In order to achieve the above object, in the camera according to the fifth aspect of the present invention, in the fourth aspect, the image display means switches the photographing mode to the second photographing mode by the switching means. The electronic viewfinder is displayed in red single color.

  According to the fifth aspect, in the pseudo-infrared imaging mode, display as if the dark red optical filter is attached can be performed by performing electronic viewfinder display with red single color display.

  In order to achieve the above object, in the camera according to the sixth aspect of the present invention, in the fourth or fifth aspect, the image display means displays the image without changing the color during the reproduction operation of the recorded image. I do.

  According to the sixth aspect, the recorded image can be correctly reproduced and displayed by displaying the image without changing the color during the reproduction operation of the recorded image.

  In order to achieve the above object, in the camera according to the seventh aspect of the present invention, in the first, third, or fourth aspect, the pseudo infrared image generating means performs the pseudo image processing by digital image processing. It is comprised so that an infrared image may be produced | generated.

  According to the seventh aspect, exposure control or display control can be performed using digital image processing.

  According to the present invention, correct exposure control can be performed even in pseudo infrared imaging using digital image processing, and the user can easily recognize that the current imaging mode is the pseudo infrared imaging mode. A camera that can be provided can be provided.

  In the present invention, when the imaging mode is a mode capable of performing pseudo infrared imaging (hereinafter referred to as pseudo infrared imaging mode), exposure control is performed using a signal component different from the normal case. Further, according to the present invention, when the photographing mode is the pseudo infrared photographing mode, a finder display different from the normal case is performed.

Embodiments of the present invention will be described below with reference to the drawings.
[Example 1]
FIG. 1 is a block diagram illustrating an internal configuration of a camera according to Embodiment 1 of the present invention. That is, the camera includes an imaging lens system 101, a lens driving mechanism 102, an exposure control mechanism 103, a filter system 104, an imaging element 105, an imaging element driver 106, a preprocessing circuit 107, and a digital processing circuit 108. A card interface (IF) 109, a recording unit 110, an image display unit 111, a system controller (CPU) 112, an operation switch unit 113, an operation state display unit 114, a flash unit 115, and a lens driver 116. And an exposure control driver 117 and an EEPROM 118.

  The imaging lens system 101 is a lens system including various lenses, and forms an image from a subject (not shown) (hereinafter referred to as a subject image) on the imaging element 105 via the exposure control mechanism 103 and the filter system 104. The lens driving mechanism 102 is a driving mechanism for driving the imaging lens system 101. Here, the lens driving mechanism 102 is driven and controlled by the lens driver 116.

  The exposure control mechanism 103 is a mechanism for controlling the exposure amount of the image sensor 105, and includes an aperture and a shutter and a driving device (for example, a motor) for driving them. Here, the exposure control mechanism 103 is controlled by the exposure control driver 117. The filter system 104 includes a low-pass filter, an infrared cut filter, and the like, and removes a high-frequency component and an infrared light component of an incident subject image.

  The imaging element 105 is color imaging means for obtaining a subject imaging signal by photoelectrically converting a subject image. Here, an interline transfer type progressive (sequential) scanning CCD having, for example, a vertical overflow drain structure is used as the image pickup device, but it goes without saying that the present invention is not limited to this. The image sensor 105 is driven and controlled by an image sensor driver 106.

  In other words, the exposure control mechanism 103 controls the amount of incident light flux from a subject (not shown) that has entered through the imaging lens system 101. Further, the light beam that has passed through the exposure control mechanism 103 is imaged on the image sensor 105 after the high frequency component and infrared light component are removed by the filter system 104. In the imaging element 105, the formed subject image is photoelectrically converted into an electrical signal (hereinafter referred to as a subject imaging signal), and this subject imaging signal is output to the preprocessing circuit 107.

  The preprocessing circuit 107 is a processing circuit including a gain control amplifier, an analog / digital (A / D) converter, and the like. That is, the subject imaging signal input from the imaging element 105 is digitized by the preprocessing circuit 107 and then output to the digital processing circuit 108.

  The digital processing circuit 108 is a processing circuit for generating color image data by performing color signal generation processing, white balance adjustment processing, matrix conversion processing, and other various digital processing. That is, the digitized subject imaging signal input from the preprocessing circuit 107 is processed by the digital processing circuit 108. As a result, color image data is generated. This color image data is output to the recording unit 110 via the card IF 109.

  The recording unit 110 is a recording medium including a memory card, for example, and stores color image data input from the digital processing circuit 108. The image display unit 111 includes, for example, an LCD monitor and a display control circuit thereof, and performs image display based on color image data input from the digital processing circuit 108. That is, the image display unit 111 functions as an electronic viewfinder (EVF) before shooting. That is, in this electronic viewfinder display, the image acquired by the image sensor 105 is displayed on the image display unit 111 in real time. Further, the image display unit 111 also functions as a monitor for confirming the photographing result and reproducing the image recorded in the recording unit 110.

  A system controller (CPU) 112 is a central control circuit for performing overall control of the entire camera.

  The operation switch unit 113 is various switches that are turned ON / OFF in conjunction with operation buttons provided outside the camera. The operation buttons include, for example, a release button 113a and a shooting mode switching operation member (hereinafter referred to as a switching button) 113b shown in FIG. Here, the release button 113a is a button for instructing the camera to perform a series of imaging sequences, and the switch button 113b is used to change the camera shooting mode to the first shooting mode (at least one of the color shooting mode and the monochrome shooting mode). It is an operation member for switching between one imaging mode) and the second imaging mode (pseudo infrared imaging mode). Here, the color photographing mode is a photographing mode for photographing a normal color image, the monochrome photographing mode is a photographing mode for photographing a monochrome image, and the pseudo infrared photographing mode photographs a pseudo infrared image. Is a shooting mode. Information such as the state of the operation switch unit 113 and the shooting mode is displayed on the operation state display unit 114.

  The strobe unit 115 is a light emitting unit used for auxiliary light irradiation at the time of photographing. The strobe unit 115 is controlled by an exposure control driver 117.

  The EEPROM 118 is a non-volatile memory for storing various setting information of the camera.

  In the camera having such a configuration, the system controller (CPU) 112 performs overall control of the camera. That is, the CPU 112 controls the exposure control driver 117 to drive and control the shutter device included in the exposure control mechanism 103, and controls the imaging element driver 106 to drive and control the imaging element 105, so that the imaging element 105 is controlled. Control of exposure (charge accumulation) and readout of accumulated signals. Also, during the shooting sequence, the subject imaging signal read from the imaging element 105 is taken into the digital processing circuit 108 via the preprocessing circuit 107 and subjected to various signal processing, and then is sent to the recording unit 110 via the card IF 109. Let me record.

  Next, the configuration in the digital processing circuit 108 including the pseudo infrared image generation means will be described in more detail with reference to FIG. That is, the digital processing circuit 108 includes a color signal generation circuit 108a, a white balance adjustment circuit 108b, a matrix circuit 108c, a post-processing circuit 108d, a signal switching circuit 108e, an integration circuit 108f, and a display signal. And a processing circuit 108g.

  The output of the preprocessing circuit 107 is first input to the color signal generation circuit 108a. In the color signal generation circuit 108 a, RGB signals that are additive primary mixed three primary colors are generated from the digitized subject imaging signal input from the preprocessing circuit 107.

  Among the color signals generated by the color signal generation circuit 108a, the R signal and the G signal are output to the signal switching circuit 108e. The signal switching circuit 108e is a switching circuit for selectively switching color signals used for integration during exposure control. That is, the color signal selected by the signal switching circuit 108e is output to the integration circuit 108f and integrated by the integration circuit 108f. The integration result is output to the CPU 112, and the exposure calculation is performed by the CPU 112 based on the result.

  The color signal generated by the color signal generation circuit 108a is also input to the white balance adjustment circuit 108b. In the white balance adjustment circuit 108b, the respective gains of the RGB signals are adjusted according to a preset white balance mode (for example, clear sky mode, cloudy mode, auto mode, etc.). Here, in general white balance adjustment, there are many forms in which the G gain is fixed and the R gain and the B gain are adjusted, but the same applies to the first embodiment. By such white balance adjustment, the ratio of RGB to the white subject becomes equal.

  After the white balance adjustment, the matrix circuit 108c generates a luminance / color difference component signal composed of the luminance signal Y and the color difference signals (RY) and (BY) using a predetermined matrix coefficient.

Here, in the color photographing mode, the luminance color difference matrix uses a standard matrix coefficient (for example, NTSC system or ITU Rec601 equivalent).
Y = 0.3R + 0.59G + 0.11B (Formula 1)
R−Y = 0.7R−0.59G−0.11B (Formula 2)
BY = 0.89B-0.3R-0.59G (Formula 3)
It becomes. In the monochrome photography mode, the color difference signals (R−Y) and (B−Y) are 0 in the above (Expression 2) and (Expression 3).

On the other hand, in the pseudo infrared imaging mode, the luminance signal Y is generated with the R signal as a main component, so the luminance color difference matrix is
Y = R (Formula 4)
RY = 0 (Formula 5)
BY = 0 (Formula 6)
It becomes.

  After the component signal is generated in this way, in the post-processing circuit 108d, for example, a γ conversion process for adjusting to a standard image signal, a clipping process, or an Exif format file which is a digital camera standard recording format. Various signal processing such as JPEG compression for recording is performed. In FIG. 3, the processing circuit after the color image processing is not the essence of the first embodiment, and is therefore shown as one “post-processing circuit” in one block.

  Here, an image acquired by the image sensor 105 is displayed on the image display unit 111 at the time of displaying the electronic viewfinder, at the end of shooting, and at the time of reproducing the recorded image. In order to perform such image display, the image data generated in the post-processing circuit 108d is output to the display signal processing circuit 108g, and the display signal processing circuit 108g performs display RGB signal by color matrix calculation processing. Is generated. An image is displayed on the image display unit 111 based on the generated display RGB signal.

That is, in the color photographing mode, the color matrix is an inverse matrix of the luminance color difference matrix represented by (Expression 1) to (Expression 3), that is,
R = Y + (R−Y) (Formula 7)
G = Y− (1 / 0.59) {0.3 (R−Y) +0.11 (B−Y) (Formula 8)
B = Y + (BY) (Formula 9)
It becomes. On the other hand, in the pseudo-infrared imaging mode, the color matrix is an inverse matrix of the luminance color difference matrix represented by (Expression 4) to (Expression 6), that is,
R = Y (Formula 10)
G = 0 (Formula 11)
B = 0 (Formula 12)
It becomes.

  As described above, an image is displayed on the image display unit 111 based on the generated display RGB signal.

  Next, control during exposure control and viewfinder image display in such a camera will be described with reference to the flowchart of FIG. In FIG. 4, different exposure control and display control are performed depending on whether or not the camera photographing mode is the pseudo infrared photographing mode.

  When exposure control starts, the CPU 112 first determines the state of a switch that is turned ON / OFF in conjunction with the operation of the switching button 113b, and determines whether or not the current imaging mode is the pseudo infrared imaging mode. (Step S1). Note that the photographing mode may be switched every time the switching button 113b is pressed, for example. Further, the switching button 113b does not have to have the shape of a “button” as shown in FIG. 2, and may be an operation member such as a dial.

  If it is determined in step S1 that the current mode is the first imaging mode that is not the pseudo infrared imaging mode, the CPU 112 instructs the signal switching circuit 108e to output the G signal to the integrating circuit 108f. (Step S2).

  That is, in the first photographing mode, conventional general exposure control using the image sensor output is employed. This general exposure control is performed by integrating the RGB point sequential signal from the image sensor 105 or the G signal after generating the color signal with a digital integration circuit. The reason why the exposure control is performed in this manner is that it is advantageous in terms of control because it is possible to directly grasp the exposure state in the image sensor before receiving various gain adjustments and γ processing in the subsequent stage. The G signal is used as a signal to be controlled by exposure control because it is the main component of the standard luminance signal and is the signal component that is most likely to be saturated in the image sensor. In many cases, white balance is used. This is also due to the fact that control is easy because the G signal is adopted as a reference in the processing.

  In step S2, after the G signal is output from the signal switching circuit 108e, the G signal is integrated by the integrating circuit 108f (step S3). Since the integral value at this time, that is, the average luminance level of the shooting target area indicates the exposure amount, the CPU 112 determines the exposure amount of the subject (not shown) from the exposure amount and the value of the exposure parameter (aperture value and exposure time) when the exposure amount is detected. A proper exposure condition is calculated by obtaining a luminance level and performing various calculations (step S4). Then, the CPU 112 performs color image display on the image display unit 11 based on the color matrix shown in the above (Expression 7) to (Expression 9) with the conditions such as the aperture and the shutter set to the appropriate exposure conditions ( Step S5). By such control, an electronic finder display using a color image is performed on the image display unit 11. Here, in the monochrome photographing mode, both (Equation 2) and (Equation 3) may be set to 0 to apply the color matrix.

  On the other hand, if it is determined in step S1 that the current mode is the pseudo infrared imaging mode as the second imaging mode, the CPU 112 outputs the R signal to the integrating circuit 108f so as to output the R signal to the integrating circuit 108f. A command is sent to (step S6).

  In this way, in the pseudo infrared imaging mode, if the signal to be subject to exposure control is not switched from the G signal to the R signal, the integrated signal is the G signal. On the other hand, since the R signal component is used for the image signal (luminance signal), depending on conditions such as the color of the subject and lighting, a problem with the exposure level, for example, when shooting sunsets undershoots when shooting green trees. A problem such as overexposure occurs. In order to avoid such inconvenience, in the first embodiment, the signal to be subjected to exposure control in the pseudo infrared imaging mode is switched from the G signal to the R signal.

  In step S6, after outputting the R signal from the signal switching circuit 108e, the integrating circuit 108f integrates the R signal (step S7). Next, the CPU 112 calculates an appropriate exposure condition based on the integral value of the R signal and the like (step S8). Then, the CPU 112 performs color image display on the image display unit 11 based on the color matrix shown in the above (Expression 10) to (Expression 12) with the conditions such as the aperture and the shutter set to the appropriate exposure conditions ( Step S9). By such control, electronic viewfinder display with a red monochrome image is performed on the image display unit 11.

  By performing such a display, the finder display looks as if a dark red optical filter is attached to the lens in the optical finder, so that the user can confirm that the current shooting mode is the pseudo infrared shooting mode. Easy to recognize.

  In step S9, a red monochrome image is displayed, but the color of the image at the time of recording is normal monochrome (monochrome). For this reason, if the confirmation image display after the shooting is completed and the reproduction of the recorded image is also performed in the red monochrome display, the recorded image will appear as if it is a red image, which causes misunderstanding for the user. A malfunction will occur. Therefore, the confirmation image display after the end of shooting and the reproduction of the recorded image are performed in a normal monochrome display.

In the pseudo-infrared imaging mode, the G and B pixels of the LCD are not used for electronic viewfinder display, so the resolution is lowered. Therefore, in the electronic finder display, some G and B pixels are used, for example,
R = Y (Formula 10)
G = 0.3 (Formula 13)
B = 0.3 (Formula 14)
A color matrix may be used. The coefficients in (Equation 13) and (Equation 14) are merely examples, and the present invention is not limited to this.

  As described above, according to the first embodiment, in the pseudo infrared imaging mode, the exposure control target signal is switched from the normal G signal to the R signal, so that the exposure can be controlled even in the pseudo infrared imaging mode. There is no problem.

  In addition, in the pseudo infrared imaging mode, since the electronic viewfinder display is performed with a red monochrome display, it is easy for the user to recognize that the current imaging mode is the pseudo infrared imaging mode.

[Example 2]
Next, a second embodiment of the present invention will be described. The second embodiment is an example in which it is not necessary to switch a signal to be subjected to exposure control according to a shooting mode.

  FIG. 5 is a block diagram illustrating a configuration in the digital processing circuit 108 according to the second embodiment. That is, the second embodiment is different from the first embodiment in that the input of the integrating circuit 108f is a luminance signal Y instead of a color signal. For this reason, the signal switching circuit 108e can be omitted. By performing exposure control based on the level of the luminance signal Y in this way, exposure control can be performed based on the level of the luminance signal Y = R signal even in the pseudo infrared imaging mode. The problem does not occur.

  The control at this time is shown in the flowchart of FIG. That is, after the exposure control is started, the luminance signal Y is extracted from the component signals generated by the matrix circuit 108c and input to the integrating circuit 108f (step S11). The integrating circuit 108f integrates the input luminance signal Y (step S12). Next, the CPU 112 calculates an appropriate exposure condition based on the integrated value of the luminance signal Y and the like (step S13).

  Next, the CPU 112 determines whether or not the current shooting mode is the pseudo infrared shooting mode (step S14), and displays a red monochrome image on the image display unit 111 based on the result of the determination (step S15). Alternatively, color image display (step S16) is performed.

  As described above, according to the second embodiment, since the signal component that is subject to exposure control is the luminance signal Y, it is not necessary to switch the signal that is subject to exposure control according to the shooting mode.

  Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications and applications are naturally possible within the scope of the gist of the present invention.

  Further, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention can be solved. Can be extracted as an invention.

It is a block diagram which shows the internal structure of the camera which concerns on Example 1 of this invention. It is an external appearance perspective view of a camera. It is a block diagram which shows the internal structure of the digital signal processing circuit of Example 1 of this invention. It is a flowchart of exposure and display control of the camera which concerns on Example 1 of this invention. It is a block diagram which shows the internal structure of the digital signal processing circuit of Example 2 of this invention. It is a flowchart of exposure and display control of the camera which concerns on Example 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Imaging lens system, 102 ... Lens drive mechanism, 103 ... Exposure control mechanism, 104 ... Filter system, 105 ... Imaging device, 106 ... Imaging device driver, 107 ... Pre-processing circuit, 108 ... Digital processing circuit, 108a ... Color signal Generation circuit 108b ... White balance adjustment circuit 108c ... Matrix circuit 108d ... Post-processing circuit 108e ... Signal switching circuit 108f ... Integration circuit 108g ... Display signal processing circuit 109 ... Card interface (IF) 110 ... Recording unit 111 ... Image display unit 112 ... System controller (CPU) 113 ... Operation switch unit 113a ... Release button 113b ... Shooting mode switching operation member (switch button), 114 ... Operation status display unit 115 ... Strobe unit 116 ... Lens driver 117 ... Exposure control Driver, 118 ... EEPROM

Claims (7)

A pseudo-infrared image having a photographing effect substantially equivalent to a photograph obtained by pseudo-infrared effect photographing combining black-and-white film having sensitivity to at least a red component and mounting of a dark red optical filter accessory A pseudo infrared image generating means capable of generating without attaching a filter accessory;
A first photographing mode including at least one of a color photographing mode capable of photographing a color image and a monochrome photographing mode capable of photographing a monochrome image, and pseudo red using the pseudo infrared image generating means. Switching means for switching between a second shooting mode that is a shooting mode capable of shooting an outside image;
Signal switching means for switching a signal component to be subject to exposure control when the photographing mode is switched to the second photographing mode by the switching means;
A camera comprising:   2. The signal switching unit according to claim 1, wherein, in the second shooting mode, the signal switching unit switches the signal component to be subject to exposure control to a red component of additive three-primary colors RGB. camera. Imaging means for imaging a subject and obtaining a subject imaging signal;
Matrix means for generating at least a luminance signal from each color signal of the subject imaging signal output from the imaging means;
A pseudo-infrared image having a photographing effect substantially equivalent to a photograph obtained by pseudo-infrared effect photographing combining black-and-white film having sensitivity to at least a red component and mounting of a dark red optical filter accessory A pseudo infrared image generating means capable of generating without attaching a filter accessory;
Exposure control means for performing exposure control as the luminance signal generated by the matrix means when the pseudo infrared image is generated by the pseudo infrared image generation means;
A camera comprising: A pseudo-infrared image having a photographing effect substantially equivalent to a photograph obtained by pseudo-infrared effect photographing combining black-and-white film having sensitivity to at least a red component and mounting of a dark red optical filter accessory A pseudo infrared image generating means capable of generating without attaching a filter accessory;
As a shooting mode of the camera, a first shooting mode including at least one of a color shooting mode capable of shooting a color image and a monochrome shooting mode capable of shooting a monochrome image, and the pseudo infrared image Switching means for switching between a second imaging mode, which is an imaging mode capable of imaging a pseudo infrared image using the generating means,
Image display means capable of performing different electronic viewfinder display in the first shooting mode and the second shooting mode;
Comprising
The image display means can distinguish the color of the electronic finder display from the color of the electronic finder display in the first photography mode when the photography mode is switched to the second photography mode by the switching means. A camera that displays electronic viewfinder by shifting to red above a certain level.   5. The camera according to claim 4, wherein the image display means performs electronic finder display with red single color display when the photographing mode is switched to the second photographing mode by the switching means.   The camera according to claim 4 or 5, wherein the image display means displays an image without changing a color during a reproduction operation of a recorded image.   The camera according to claim 1, wherein the pseudo infrared image generation unit is configured to generate the pseudo infrared image by digital image processing.

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