JP4939451B2 - Imaging device and method of correcting angle information of imaging device - Google Patents

Description

The present invention relates to an image pickup apparatus having a level function, it relates to a method of correcting the angle information of the imaging equipment and an imaging device having a high level indicator function accurate by particular temperature correction.

  In recent years, an imaging apparatus such as a digital camera has been reduced in size and weight, and can be easily carried and used in various places. Further, the function of a digital camera is also incorporated in a mobile phone or the like. It became so.

An image pickup apparatus including such a digital camera is reduced in size and weight, and is held by a person, and thus is not always taken in a stable posture. In addition, an inclination that is difficult to notice is more likely to occur in the image.
For this reason, it is desirable for the imaging apparatus to have a function for allowing the photographer to recognize the tilt of the screen by detecting the tilt of the apparatus body and displaying the tilt angle on the monitor screen at the time of shooting. .

  In Patent Document 1, when a still image is acquired, the inclination of the still image is detected, and information indicating the detected inclination is recorded on a recording medium together with the still image. An imaging apparatus that corrects the inclination of the imaging result by properly reflecting the user's intention and thereby correcting the inclination of the imaging is disclosed.

  Also, in Patent Document 2, a shooting mode corresponding to a moving image or a still image is provided, and a tilt guide display signal is obtained from detected tilt information only when tilt display is requested in the still image shooting mode. An imaging apparatus is disclosed that generates and sends it to a display processing circuit, and displays a tilt guide display on a screen that displays the captured image.

  However, in both Patent Documents 1 and 2, there is no mention of correction of the angle according to the temperature difference during use, so the output value of the tilt detection sensor varies depending on the temperature depending on the use environment, and the tilt There arises a problem that the detection accuracy is lowered. Furthermore, since the output value of the tilt detection sensor is affected by temperature depending on each angle, an imaging device that can perform high-precision correction at any angle is required.

JP 2004-343476 A JP 2007-174156 A

The present invention has been made in view of the above problems, and provides an imaging apparatus and an angle information correction method for an imaging apparatus that can highly accurately correct fluctuations in output values due to temperature at any inclination angle. For the purpose.

In order to solve the above problems, the image pickup apparatus or the angle information correction method of the image pickup apparatus according to the present invention specifically has the technical features described in the following (1) to (8).
(1): an angle detecting means for detecting an angle of inclination from the horizontal, and a temperature detecting means for detecting a temperature, and temperature information those found by the angle information and the temperature detecting means that will be detected by the angle detecting means A recording means for recording the relationship , and determining a temperature correction factor from the current angle information detected by the angle detecting means and the relationship between the angle information and the temperature information of the recording means. The current angle information is corrected with the temperature correction factor and the current temperature information detected by the temperature detecting means, and the temperature correction factor is different between immediately after starting the imaging device and other than immediately after starting. An imaging device characterized by the above.

( 2 ): It further comprises time detection means and time recording means for recording the time detected by the time detection means, and the current time information detected by the time detection means and the time recording means recorded Compared with time information, the temperature correction factor is different between the case where the imaging apparatus is immediately after start-up and a predetermined time is separated from the previous stop time, and other cases The imaging apparatus according to (1) above.

( 3 ): The imaging device according to (1) or (2) , wherein the angle detection unit detects a roll angle and / or a pitch angle.

( 4 ) The imaging apparatus according to any one of (1) to ( 3 ), wherein the angle detection means is a biaxial or triaxial acceleration sensor.

(5): is the imaging device according to any one of the previous SL above, characterized in that it comprises a display device for displaying said detected current angle information by the angle detecting means (1) to (4) .

( 6 ): The imaging device according to ( 5 ), wherein the display device displays a captured image.

  According to the present invention, it is possible to provide an imaging apparatus capable of correcting the fluctuation of the output value due to the temperature with high accuracy at any inclination angle.

  Hereinafter, embodiments of an imaging device according to the present invention will be described with reference to the drawings. In addition, the number of each figure has attached the same number as much as possible regarding the same member and the same process.

[First Embodiment]
FIG. 1 is an external top view showing a configuration of a digital camera which is an embodiment of an imaging apparatus according to the present invention, FIG. 2 is an external front view, and FIG. 3 is an external rear view.

  As shown in FIG. 1, a release switch (SW1), a mode dial switch (SW2), and a jog dial switch 1 (SW3) are disposed on the upper surface of the imaging apparatus. As shown in FIG. 2, a strobe light emitting unit 1, a distance measuring unit 2, an optical finder 3 and a lens barrel unit 4 are provided on the front side of the imaging apparatus. The lens barrel unit 4 includes a photographing lens.

  Further, as shown in FIG. 3, on the back of the imaging apparatus, there are an LCD monitor 5, a jog dial switch 2 (SW4), a zoom SW [TELE] (SW5), a zoom SW [WIDE] (SW6), and an upper SW (SW7). , Right SW (SW8), OK SW (SW9), left SW (SW10), bottom / macro SW (SW11), DISPLAY SW (SW12), delete SW (SW13), MENU SW (SW14), and power SW (SW15) Is provided. A battery cover 6 is provided on the side surface of the imaging device. The optical viewfinder 3 provided on the front surface of the imaging device is also provided at the same position on the back surface, and is fixed in a state of being inserted through the imaging device.

Each of the switches SW1 to SW15 is a switch operated by the user and constitutes an operation key unit. Note that the appearance of the digital camera as the imaging apparatus according to the present invention is not necessarily limited to the appearance shown in FIGS. 1 to 3, and may have a different appearance.
Since the functions and operations of the respective parts of the digital camera as the image pickup apparatus are known, detailed description thereof will be omitted, and the system configuration inside the image pickup apparatus will be described with reference to FIGS. explain.

FIG. 4 is a block diagram schematically showing a part of a system configuration in a digital camera which is an embodiment of an imaging apparatus according to the present invention.
In FIG. 4, a CCD (101) is a solid-state image sensor for photoelectrically converting an optical image. The F / E (front end) -IC (102) performs CDS (102-1) for performing correlated double sampling for image noise removal on the image signal input from the CCD, and AGC (102-) for performing gain adjustment. 2) having an A / D (102-3) for digital signal conversion, further supplied with a vertical synchronizing signal and a horizontal synchronizing signal from the CCD1 signal processing block (104-1), and a CPU block (104-3). ) Controlled by a CCD (101) and a TG (102-4) for generating a drive timing signal for the F / E-IC (102).

  The lens barrel unit (4) includes a zoom lens (4-1a) for capturing an optical image of a subject, a zoom optical system (4-1) including a zoom drive motor (4-1b), a focus lens (4-2a), and a focus. Focus optical system (4-2) composed of drive motor (4-2b), diaphragm (4-3a), diaphragm unit (4-3) composed of diaphragm motor (4-3b), mechanical shutter (4-4a), mechanical A mechanical shutter unit (4-4) composed of a shutter motor (4-4b) and a motor driver (4-5) controlled by the CPU block (104-3) to drive each motor.

  The digital still camera processor (104) performs white balance setting and gamma setting on the output data of the F / E-IC (102) from the CCD (101), and, as described above, outputs the vertical synchronizing signal and horizontal synchronizing signal. A CCD1 signal processing block (104-1) to be supplied, a CCD2 signal processing block (104-2) for converting into luminance data and chrominance data by filtering processing, and a CPU block (104-) for controlling the operation of each part of the apparatus described above. 3) The local SRAM (104-4) for temporarily storing the data necessary for the above-described control, the USB block (104-5) for performing USB communication with an external device such as a personal computer, and the external device such as a personal computer. Serial block (104-6) for serial communication, JPEGCO for JPEG compression / decompression EC block (104-7), RESIZE block (104-8) for enlarging / reducing the size of the image data by interpolation processing, and converting the image data into a video signal for display on an external display device such as a liquid crystal monitor or TV. Data communication is connected to a TV signal display block (104-9), a memory card block (104-10) for controlling a memory card for recording captured image data, and an acceleration sensor (111) which is an angle detection means described later. An I2C (Inter Integrated Circuit) block (104-11) is provided.

  The CPU block (104-3) causes the strobe light emitting unit 1 to emit illumination light by controlling the strobe circuit. In addition, the CPU block (104-3) controls the distance measuring unit 2.

  The SDRAM (103) temporarily stores image data when the digital still camera processor (104) performs various processes on the image data. For example, the image data to be stored is acquired from the CCD (101) via the F / E-IC (102), and the white balance setting and the gamma setting are performed by the CCD1 signal processing block (104-1). “RAW-RGB image data” in the state and “YUV image data” in which the luminance data / color difference data conversion is performed in the CCD 2 signal processing block (104-2), JPEG compression is performed in the JPEGCODEC block (104-7). “JPEG image data”. The built-in memory (107) is a memory for enabling the captured image data to be stored.

The ROM (113) stores a control program and parameters for control described in codes readable by the CPU block (104-3). When the power of the digital camera is turned on, the control program is loaded into a main memory (not shown), and the CPU block (104-3) controls the operation of each part of the apparatus according to the program, and the data necessary for the control, etc. The data is temporarily stored in the RAM (114) and the local SRAM (104-4) in the digital still camera processor (104).
By using a rewritable flash ROM for the ROM (113), the control program and parameters for control can be changed, and the function VerUp can be easily performed.

  The LCD driver (108) is a drive circuit that drives an LCD monitor (5) that is a display device described later, and displays the video signal output from the TV signal display block (104-9) on the LCD monitor (5). It also has a function of converting into a signal for the purpose. The LCD monitor (5) monitors the state of the subject before photographing, confirms the photographed image, displays the image data recorded in the memory card or the built-in memory (107), and displays the tilt of the imaging device. It is a monitor for performing. The video AMP (109) is an amplifier for converting 75Ω impedance of the video signal output from the TV signal display block (104-9), and the video jack (110) is connected to an external display device such as a TV. Jack for. The operation key unit (SW1-15) is a key circuit operated by the user, and the SUB-CPU (105) uses the output signal from the operation key unit (SW1-15) or the like as the user operation information as the CPU block described above. (104-3). Further, it communicates with an RTC (Real Time Clock; time detection means) (112) that counts the time to control the time.

  The acceleration sensor (111), which is an angle detection means, is mounted on a printed circuit board (PCB) and outputs 2-axis X and Y data and temperature T data to the I2C block (104-11). The digital still camera processor (104) serially communicates with the acceleration sensor 111 via the I2C block (104-11), calculates the camera tilt from the acquired data, and displays the tilt information of the roll angle on the LCD monitor (5), etc. Is superimposed on the captured image. The camera tilt is calculated by, for example, the CPU block (104-3).

  The acceleration sensor 111 according to the present embodiment is not only an angle detection unit that detects an angle but also a temperature detection unit that detects temperature T data, and can output the detected temperature T data. Using the data of the detected temperature T, temperature correction described later is performed. However, in the present invention, there is no problem even if the temperature detection sensor which is the temperature detection means is provided as a separate body from the acceleration sensor 111, and the same effect can be obtained by such a configuration.

  The acceleration sensor 111 has two or three axes, and is generally a sensor that can detect motion acceleration and gravitational acceleration. Here, in order to consider a stationary state (motion acceleration = 0), an angle as described later is calculated in consideration of only gravitational acceleration. In this case, a biaxial or triaxial acceleration sensor is required.

  The detected roll angle θ with respect to the horizontal of the digital still camera detected by the acceleration sensor 111 is expressed by the following formula (1). Here, in the following formula (1), X0 and Y0 each represent output data when gravity is zero.

  θ [deg] = 180 / π * arctan ((Y−Y0) / (X−X0)) (1)

  In the case of a triaxial acceleration sensor, if the equation (1) is similarly applied to the Z axis, the pitch angle can be detected, and the detected data is sent to the digital still camera processor 104. The digital still camera processor 104 calculates the tilt (pitch angle) of the imaging device based on the data sent from the acceleration sensor 111, for example, by the CPU block (104-3), and superimposes the captured image on the LCD monitor 5 or the like. Can be displayed. However, the roll angle / pitch angle display function is optional and can be omitted. However, when this function is provided, only the roll angle, only the pitch angle, or both the roll angle and the pitch angle are displayed. It is preferable to provide a selection button for instructing the user to select.

  When displaying the roll angle and / or pitch angle on the LCD monitor 5, the digital still camera processor 104 determines the calculated roll angle and / or pitch angle, and determines the angle according to the angle. Change the display scale range to be displayed. This display scale has a marker display that is a pseudo bubble image like a bubble in a level using a liquid, so-called level, and by looking at the scale on the scale where this marker is located Recognize the angle. For this reason, the digital still camera processor 104 synthesizes an image of the marker indicating the angle on the display scale with the range selected and displays it on the LCD monitor 5. The angle is recorded in the built-in memory 107 or the like.

(Temperature correction A)
Next, a first embodiment of temperature correction for the detected roll angle θ in the imaging apparatus of the present invention will be described.
FIG. 5 is a graph showing the temperature change of the detected roll angle θ of the acceleration sensor when the roll angle of the imaging device of the present invention is 0 °, and FIG. 6 is the graph when the roll angle of the imaging device of the present invention is 90 °. It is a graph which shows the temperature change of the detection roll angle | corner (theta) of an acceleration sensor.

  In the present embodiment, the acceleration sensor 111 is provided for detecting the inclination of the roll angle in the digital still camera. In the acceleration sensor 111, even if the digital still camera is stationary at the same angle in the roll angle direction, the output values X and Y change as the temperature changes. The detected roll angle θ is calculated using the changed output values X and Y. For this reason, even if the digital still camera is stationary at the same angle in the roll angle direction, the detected roll angle θ converted from the output value also changes as the temperature changes.

  If the temperature changes of the output values X and Y of the acceleration sensor 111 have no correlation between X and Y, the correction amount for the output values X and Y of the acceleration sensor differs depending on the roll angle of the digital still camera. For example, when the temperature rises horizontally (0 °) as shown in FIG. 5, the output value increases when converted to the detected roll angle θ, while the temperature rises at 90 ° as shown in FIG. There is a state where the output value decreases when converted to the detected roll angle θ. Thus, since the rate of change of the output value with respect to the temperature varies depending on the roll angle of the digital still camera, the correction rate for calculating the appropriate roll angle of the digital still camera is changed from the detected roll angle θ at each roll angle. There is a need.

An example of temperature correction for calculating an appropriate digital still camera roll angle from a specific detected roll angle θ will be described below.
Detected roll angle θ when horizontal (roll angle is 0 °) is θ0, detected roll angle θ is 90 ° when roll angle is 90 °, and detected roll angle θ is −270 ° when roll angle is −90 °. The two values of 0 ° C. and 50 ° C. at the respective detected roll angles (θ0 · θ90 · θ270) are stored in the ROM (113) which is a recording means. The detected roll angle θ0 at 0 ° C is θ0_t0, the detected roll angle θ0 at 50 ° C is θ0_t50, the detected roll angle θ90 at 0 ° C is θ90_t0, the detected roll angle θ90 at 50 ° C is θ90_t50, 0 ° C The detected roll angle θ270 at this time is θ270_t0, and the detected roll angle θ270 at 50 ° C. is θ270_t50.

  Furthermore, each value is preserve | saved also at 25 degreeC used as a reference | standard. The detected roll angles θ are θ0_t25, θ90_t25, and θ270_t25, respectively. Further, the value of the temperature T at that time is also stored. T at 0 ° C is T0, T at 25 ° C is T25, and T at 50 ° C is T50.

  Using the above-described detected roll angle θ (angle information) and temperature T (temperature information), the roll angle A after temperature correction indicating the roll angle of an appropriate digital still camera in the present embodiment is expressed by the following equation (2) and It can be calculated in (3). Table 1 shows the angles of (0 ° C. detection roll angle θ), (25 ° C. detection roll angle θ), and (50 ° C. detection roll angle θ) in the following formulas (2) and (3). Refer to and use the corresponding value. By using Table 1, it is possible to perform accurate correction at each roll angle.

When T> T25 (temperature is higher than 25 ° C.) A = detection roll angle θ− (T−T25) * ((50 ° C. detection roll angle θ) − (25 ° C. detection roll angle θ)) / 25 · (2)
T <T25 A = detected roll angle when the (temperature is lower than 25 ℃) θ + (T- T25) * ((0 detecting the roll angle of ° C. theta) - (Detection roll angle of 25 ℃ θ)) / 25 ··・ (3)

  In the present embodiment, the tilt in the pitching direction of the imaging apparatus can be appropriately corrected with the same configuration.

  According to the digital still camera of the first embodiment, it is possible to accurately correct fluctuations in the output value due to temperature at any tilt angle. Further, in particular, the accuracy can be further improved by correcting the temperature at the position where the accuracy of θ is obtained (in the case of the first embodiment described above, 0 °, ± 90 °).

[Second Embodiment]
(Temperature correction B)
A second embodiment of temperature correction of the detected roll angle θ in the imaging apparatus of the present invention will be described. The present embodiment has the same configuration as that of the first embodiment except that the temperature correction is different.
FIG. 8 is a graph showing the change in internal temperature over time after the digital still camera is activated.
As shown in FIG. 8 , the internal temperature rises immediately after the digital still camera is activated.

FIG. 7 is a graph showing the change over time of the detected roll angle θ of the acceleration sensor accompanying the increase in internal temperature after the digital still camera of the first embodiment is activated.
As shown in FIG. 8, since the internal temperature increase rate in the first period at the time of monitoring is very high, for example, also in the digital still camera (temperature correction A) of the first embodiment, the detected roll angle in this period θ is not subjected to proper temperature correction, and a value different from the actual roll angle is calculated.
As described above, in the first embodiment, the accuracy immediately after the start-up is poor, and the roll angle A after temperature correction does not correspond to a rapid temperature change, so that a difference from the actual roll angle occurs. For this reason, it is set as the structure which changes a temperature correction factor only immediately after starting, and roll angle B after temperature correction is calculated according to the following procedures.

As shown in FIGS. 7 and 8, when the digital still camera is activated for several minutes, the temperature rise rate inside the camera decreases and the detected roll angle θ is stabilized. In this stable state, the temperature correction is appropriately performed by the temperature correction in the first embodiment, so that there is no difference between the actual roll angle and the roll angle A after the temperature correction. In addition, if the internal temperature of the camera has already been sufficiently warmed from the time of startup, there is no sudden temperature rise from that temperature, so there is a difference between the actual roll angle and the roll angle A after temperature correction. Does not occur. In these cases, the roll angle A after temperature correction is applied.

FIG. 9 shows a flowchart of temperature correction control immediately after the digital still camera is activated in the second embodiment of the imaging apparatus according to the present invention.
The time data of the RTC 112 immediately after the start is Rs (RTC start), and the time data of the RTC 112 immediately before the end is Re (RTC end).

First, the time data Rs of the RTC 112 at the time of starting this time and the time data Re-1 (RTC end-1) of the RTC 112 immediately before the end of the previous time stored at the previous use are acquired (Step 1).
If there is a difference in Rth (RTC threshold) comparing Rs and Re-1 (Step 2), it is determined that the internal temperature of the camera has risen rapidly after startup and that the internal temperature of the camera has risen rapidly after startup. The post-correction roll angle B is applied (Step 3). After m minutes, when the rapid increase in the internal temperature of the camera ends, shooting is continued by applying the roll angle A after temperature correction instead of the roll angle B after temperature correction (Step 4, Step 6).

Next, Rs is compared with Re-1, and when there is no Rth difference (Step 2), an RTC bit described later is confirmed (Step 5).
If RTC bit = 1, the roll angle A after temperature correction is applied (Step 6).
If RTC bit = 0, it is determined that the power was turned off before the internal temperature of the camera sufficiently increased at the previous activation, and a roll angle B after temperature correction described later is applied (Step 3). After m minutes, when the rapid increase in the internal temperature of the camera ends, shooting is continued by applying the roll angle A after temperature correction instead of the roll angle B after temperature correction (Step 4, Step 6).

  The RTC bit is obtained by comparing the time data Rs-1 (RTC start-1) of the RTC 112 immediately after activation at the previous use with the time data Re-1 of the RTC 112 immediately before the end of the previous use, and Rth2 (RTC threshold2). If there is a difference, information RTC bit = 1 is stored in the ROM 113, and if there is no difference, information RTC bit = 0 is stored in the ROM 113 (Step 7). That is, the information that RTC bit = 1 is stored in the ROM 113 if it has been used for a certain time (Rth2) at the previous use.

Here, temperature correction of the roll angle B after temperature correction will be described.
As shown in FIGS. 7 and 8, the temperature output T and the detected roll angle θ change immediately after the imaging apparatus is started. When these are illustrated collectively, they are as shown in FIGS. FIG. 10 is a t-θ graph showing the change over time of the detected roll angle θ after activation of the imaging device used for temperature correction adjustment. FIG. 11 is a T-θ graph showing a change in temperature of the detected roll angle θ after activation of the image pickup apparatus used for temperature correction adjustment. Here, t_m is a time (m minutes after) elapsed from the start of the apparatus until a detected roll angle is detected, θ1 is a detected roll angle after the time t_m has elapsed, and Tm is an internal temperature of the apparatus after the time t_m has elapsed. , Θ0 is the detected roll angle at T25 (apparatus internal temperature 25 ° C.).
When adjusting the digital still camera, the characteristics Δθ / ΔT used for the calculation of the temperature correction B are calculated using these (see FIG. 11), and are stored in the ROM as the recording means.
Here, Δθ / ΔT is (θ1−θ0) / (Tm−T25).

  At the time of temperature correction in actual use, in addition to the above, the temperature Ts immediately after startup and the roll angle θs immediately after startup are stored. Here, Δθ is set to (θ1−θs). When the temperature in actual use is T, the roll angle B after temperature correction is expressed by the following formula (4). The numerical values used in the following equation (4) are angle information, temperature information, time information, or composite information stored in the storage means.

  B = Detection roll angle θ + Δθ− (T−Ts) * Δθ / ΔT (4)

The roll angle B after temperature correction is applied in the period from the start of the apparatus to the elapsed time t_m as shown by the above formula (4).
In the present embodiment, the tilt in the pitching direction of the imaging apparatus can be appropriately corrected with the same configuration.

  According to the digital still camera of the second embodiment, it is possible to accurately correct fluctuations in the output value due to temperature at any tilt angle. Further, even when the temperature of the inside of the digital still camera immediately after startup suddenly rises, similarly, it is possible to correct the fluctuation of the output value with high accuracy.

1 is an external top view illustrating a configuration of a digital camera that is an embodiment of an imaging apparatus according to the present invention. 1 is an external front view showing a configuration of a digital camera that is an embodiment of an imaging apparatus according to the present invention. 1 is an external rear view illustrating a configuration of a digital camera that is an embodiment of an imaging apparatus according to the present invention. 1 is a block diagram schematically showing a part of a system configuration in a digital camera which is an embodiment of an imaging apparatus according to the present invention. It is a graph which shows the temperature change of detection roll angle (theta) of an acceleration sensor in case the roll angle of the imaging device of this invention is 0 degree. It is a graph which shows the temperature change of the detection roll angle (theta) of an acceleration sensor in case the roll angle of the imaging device of this invention is 90 degrees. It is a graph which shows the time change of the detection roll angle | corner (theta) of the acceleration sensor accompanying the raise of internal temperature after starting the digital still camera of 1st Embodiment. It is a graph which shows the time change of the internal temperature after starting of a digital still camera. It is a flowchart of the temperature correction control immediately after starting the digital still camera in 2nd Embodiment of the imaging device which concerns on this invention. It is a t-theta graph which shows time change of detection roll angle theta after starting of an imaging device used at the time of temperature correction adjustment. It is a T-theta graph which shows a temperature change of detection roll angle theta after starting of an imaging device used at the time of temperature correction adjustment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strobe light emission part 2 Ranging unit 3 Optical finder 4 Copper mirror 5 LCD monitor 6 Battery cover 101 CCD
102 F / E-IC
103 SDRAM
104 Digital still camera processor 105 SUB-CPU
106 Strobe Circuit 107 Built-in Memory 108 LCD Driver 109 Video AMP
110 Video Jack 111 Acceleration Sensor 112 RTC (Real Time Clock)
113 ROM
114 RAM
SW1 Release switch SW2 Mode dial SW3 Jog dial 1
SW4 Jog dial 2
SW5 Zoom SW [TELE]
SW6 Zoom SW [WIDE]
SW7 Upper SW
SW8 Right SW
SW9 OK SW
SW10 Left SW
SW11 Lower SW / Macro SW
SW12 DISPLAY SW
SW13 Delete SW
SW14 MENU SW
SW15 Power SW

Claims (8)

Angle detection means for detecting the angle of inclination from the horizontal;
Temperature detecting means for detecting the temperature;
An imaging apparatus comprising a recording means for recording the relationship between the temperature information those found by the angle information and the temperature detecting means that will be detected by the angle detecting means,
Determine the temperature correction factor from the current angle information detected by the angle detection means, and the relationship between the angle information and temperature information of the recording means,
While correcting the current angle information with the current temperature information detected by the temperature correction factor and the temperature detection means,
The imaging apparatus, wherein the temperature correction factor is different between immediately after startup of the imaging apparatus and other than immediately after startup . Time detection means;
A time recording means for recording the time detected by the time detecting means,
Compare the current time information detected by the time detection means and the time information recorded in the time recording means,
The imaging apparatus according to claim 1, wherein the temperature correction factor is different between a case where the imaging apparatus is immediately after startup and a predetermined time is separated from a previous stop, and a case other than that. . It said angle detection means, the imaging apparatus according to claim 1 or 2, characterized in that to detect the roll angle and / or pitch angle. Said angle detection means, the imaging apparatus according to any one of claims 1 to 3, characterized in that an acceleration sensor of two or three axes. The imaging apparatus according to any one of claims 1 to 4, characterized in that it comprises a display device for displaying the previous SL the current angle information detected by the angle detecting means. The imaging device according to claim 5 , wherein the display device displays a captured image. Angle detection means for detecting the angle of inclination from the horizontal;
Temperature detecting means for detecting the temperature;
An angle information correction method for an imaging apparatus comprising: recording means for recording a relationship between angle information detected by the angle detection means and temperature information detected by the temperature detection means,
Determining a temperature correction factor from the current angle information detected by the angle detection means, and the relationship between the angle information and temperature information of the recording means;
Correcting the current angle information with the temperature correction factor and the current temperature information detected by the temperature detection means, and
A method for correcting angle information of an imaging apparatus, wherein the current angle information is corrected so that the temperature correction factor is different between immediately after startup of the imaging apparatus and other than immediately after startup. The imaging apparatus includes time detection means;
A time recording means for recording the time detected by the time detecting means,
Compare the current time information detected by the time detection means and the time information recorded in the time recording means,
The present angle information is corrected so that the temperature correction factor is different between a case where the imaging device is immediately after startup and a predetermined time is separated from a previous stop and other cases. The method for correcting angle information of the imaging apparatus according to claim 7.

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