JP2018113723A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of displaying a proper altitude even when an environment changes.SOLUTION: An imaging apparatus comprises: a pressure sensor that detects an air pressure; a temperature sensor that detects a temperature; a first measurement part that measures an altitude from a detection value by the pressure sensor; a second measurement part that measures the altitude b a measurement signal; and a control part that changes the measurement of the altitude by the first measurement part to the measurement of the altitude by the second measurement part depending on the temperature.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an imaging apparatus capable of high-level measurement and display.

  2. Description of the Related Art Conventionally, there has been known a video photographing apparatus capable of measuring water depth or altitude and displaying it on a screen and recording the water depth and altitude in a photograph or a reproduced image as necessary (see Patent Document 1).

JP-A-3-2833772

  However, the above-described video imaging apparatus does not include means for determining the measured water depth and high reliability. For this reason, when the correct water depth and altitude cannot be measured due to environmental changes or the like, there is a problem that an inaccurate water depth or altitude is displayed on the screen as it is.

  An object of the present invention is to provide an imaging apparatus capable of displaying an appropriate altitude even when the environment changes.

  An image pickup apparatus according to the present invention includes a pressure sensor that detects atmospheric pressure, a temperature sensor that detects temperature, a first measurement unit that measures altitude based on a value detected by the pressure sensor, and a second measurement that measures altitude using a positioning signal. And a controller that changes the altitude measurement by the first measurement unit to the altitude measurement by the second measurement unit according to the temperature.

  According to the imaging apparatus of the present invention, an appropriate altitude can be displayed even when the environment changes.

It is a block diagram which shows the structure of the digital camera which concerns on embodiment. It is a flowchart which shows the altitude measurement process in the digital camera which concerns on embodiment. It is a figure which shows the height displayed numerically in the digital camera which concerns on embodiment. It is a figure which shows the altitude displayed by the graph of the digital camera which concerns on embodiment. It is a figure which shows the icon displayed in the digital camera which concerns on embodiment.

  A digital camera according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a digital camera 2 according to the embodiment. The digital camera 2 includes a CPU 4. The CPU 4 includes an operation unit 5 that performs operations such as power ON / OFF, an image sensor 6 that images subject light, and an LCD display unit that displays an image captured by the image sensor 6. 8. Pressure sensor 10 for measuring atmospheric pressure, GPS 12 for measuring its own position and its altitude (hereinafter referred to as GPS altitude) based on a signal received from a GPS satellite, and temperature sensor 14 for measuring the temperature around the digital camera 2 And an information storage unit 16 for recording the altitude of the self position as log data. Further, the CPU 4 includes an altitude table (not shown) in which an altitude corresponding to the atmospheric pressure (hereinafter referred to as an atmospheric altitude) is stored. Is calculated. In the altitude table, a predetermined range of atmospheric pressures based on the standard atmospheric pressure is stored in association with the atmospheric pressure altitude.

  Next, altitude measurement processing of the digital camera 2 according to the embodiment will be described with reference to the flowchart shown in FIG. First, when the power is turned on, the CPU 4 starts measuring the atmospheric pressure by the pressure sensor 10, and calculates the atmospheric pressure altitude at its own position based on the measured atmospheric pressure (step S1).

  Next, the CPU 4 records the calculated atmospheric pressure altitude in the information storage unit 16 as log data together with the atmospheric pressure measurement date and time (step S2). The log data is recorded at a predetermined time interval set in advance.

  Next, the CPU 4 displays the barometric altitude as a numerical value on the LCD display unit 8 (step S3). For example, as shown in FIG. 3, when the barometric altitude is 35 m, [35 m] is displayed on the LCD display unit 8.

  Next, the CPU 4 determines whether or not an operation for turning off the power has been performed (step S4). When an operation to turn off the power is performed (step S4: Yes), the CPU 4 turns off the power of the digital camera 2 and ends the series of processes. On the other hand, when the operation to turn off the power is not performed (step S4: No), the CPU 4 determines the reliability of the atmospheric pressure altitude calculated in step S1 (step S5). Here, the determination of reliability is performed, for example, by determining whether or not the barometric altitude that is not stored in the altitude table has been continuously calculated a predetermined number of times. In this case, if the barometric altitude not stored in the altitude table is continuously calculated a predetermined number of times, it is determined that the barometric altitude is not reliable.

  When the atmospheric pressure altitude is reliable (step S5: Yes), the process returns to step S1, and the atmospheric pressure altitude measurement using the pressure sensor 10 is continued. In this case, recording as log data of the atmospheric pressure altitude (step S2) and numerical display of the atmospheric pressure altitude are also continuously performed (step S3).

  On the other hand, when the atmospheric pressure altitude is unreliable (step S5: No), the CPU 4 stops the atmospheric altitude measurement using the pressure sensor 10 and starts measuring the GPS altitude at its own position by the GPS 12 (step S6). Get the altitude of the measured self-position. Further, the CPU 4 stops the recording as the pressure altitude log data (step S7).

  Next, the CPU 4 simply displays the GPS altitude measured by the GPS 12 on the LCD display unit 8 (step S8). For example, as shown in FIG. 4, an altitude graph 30 having a scale for displaying altitude is displayed on the LCD display unit 8, and the position of the scale corresponding to the GPS altitude measured by the GPS 12 is indicated by an arrow 32.

  Next, the CPU 4 determines whether or not an operation for turning off the power has been performed (step S4). When an operation to turn off the power is performed (step S9: Yes), the CPU 4 turns off the power and ends a series of processes. On the other hand, when the operation to turn off the power is not performed (step S9: No), the CPU 4 determines whether GPS altitude information is continuously acquired from the GPS 12 for a predetermined time (step S10).

  When GPS altitude information has not been acquired from the GPS 12 for a predetermined time (step S10: No), the process returns to step S1, and the barometric altitude measurement using the pressure sensor 10 is resumed. In this case, the recording of the barometric altitude log data (step S2) and the numerical display of the barometric altitude are also resumed (step S3). On the other hand, when the GPS altitude information is continuously acquired from the GPS 12 for a predetermined time (step S10: Yes), the process returns to step S6, and the GPS altitude measurement by the GPS 12 is continued. In this case, recording as GPS altitude log data is not performed (step S7), and simple display of the GPS altitude is continuously performed (step S8).

  According to the digital camera 2 according to this embodiment, when the altitude cannot be measured accurately, the altitude is measured by switching the sensor, and the altitude is measured and displayed on the LCD display unit 8. Therefore, the operating environment of the digital camera 2 changes. Even an appropriate altitude can be displayed. In addition, since the barometric altitude measured using the pressure sensor 10 is numerically displayed on the LCD display unit 8, the operator can accurately recognize the altitude of the current self position. On the other hand, since the GPS altitude measured by the GPS 12 is simply displayed on the LCD display unit 8, the operator can know in which altitude range the current altitude is located.

  In the embodiment described above, the GPS altitude may be recorded as log data. In this case, the CPU 4 classifies the GPS altitude for each predetermined altitude range such as 0 m or more and less than 100 m, 100 m or more and less than 200 m, and so on. Then, the altitude range of the classified GPS altitude is recorded in the information storage unit 16 as simple log data. Thereby, even when the sensor is switched, the log data can be prevented from being interrupted.

  Further, when it is determined in step S5 of the above-described embodiment that the atmospheric pressure altitude is not reliable, the atmospheric pressure altitude measured using the pressure sensor 10 is corrected instead of performing measurement by the GPS 12. The operator may be prompted. For example, a correction icon 34 as shown in FIG. 5 is displayed on the LCD display unit 8 to warn the operator to correct the atmospheric pressure altitude.

  In this case, when the operator moves the cursor displayed on the LCD display unit 8 to a position on the correction icon 34 by clicking the icon 34 by operating the operation unit 5, the CPU 4 uses the pressure sensor 10 to measure. Correction is performed using a predetermined correction value set in advance for the atmospheric pressure altitude. Thereby, even when the standard atmospheric pressure decreases due to bad weather such as a typhoon, the atmospheric pressure altitude can be measured. Further, even when moving to a place where a signal from a GPS satellite cannot be received on a bad weather day, the altitude can be displayed on the LCD display unit 8.

  A plurality of correction icons 34 may be displayed on the LCD display unit 8. For example, a rain icon operated during normal rain and a typhoon icon operated during a typhoon are displayed on the LCD display unit 8. When the rain icon is operated, a correction using the first correction value (correction value for rain) is performed on the atmospheric pressure altitude measured using the pressure sensor 10, and the typhoon icon is operated. In this case, correction using the second correction value (typhoon correction value) is performed on the pressure altitude measured using the pressure sensor 10. Thereby, the atmospheric pressure altitude can be corrected according to the degree of bad weather.

  In the altitude measurement process of the above-described embodiment, the temperature around the digital camera 2 may be measured using the temperature sensor 14. Then, when determining the reliability of the atmospheric pressure altitude, the measurement result by the temperature sensor 14 is further referred to. For example, even in the case where the barometric altitude stored in the altitude table is continuously measured in step S5, the CPU 4 does not immediately determine that the barometric altitude is reliable, and further sets the temperature sensor 14. Using this, the amount of change in temperature measured within a predetermined time is detected.

  When the detected temperature change amount is larger than the predetermined change amount, that is, when there is a sudden temperature change, the CPU 4 determines that the atmospheric pressure altitude is not reliable. In this case, the CPU 4 starts the GPS altitude measurement by the GPS 12, stops recording the barometric altitude log data, and switches the display on the LCD display unit 8 to the simple display.

  On the other hand, when the detected temperature change amount is smaller than the predetermined change amount, that is, when there is no sudden temperature change, the CPU 4 determines that the atmospheric pressure altitude is reliable. In this case, the CPU 4 continues the barometric altitude measurement using the pressure sensor 10, the recording as barometric altitude log data, and the numerical display of the barometric altitude. Thereby, the determination accuracy of the reliability of the atmospheric pressure altitude can be improved.

  Further, referring to the measurement result by the temperature sensor 14, it may be determined whether or not the GPS altitude measurement by the GPS 12 is switched to the atmospheric pressure altitude measurement using the pressure sensor 10. For example, when an operation to turn off the power is not performed in step S9, the CPU 4 detects the change amount of the GPS altitude measured by the GPS 12 within a predetermined time. Further, the CPU 4 further detects the amount of change in temperature measured by the temperature sensor 14 within a predetermined time.

  Next, the CPU 4 determines whether or not to switch the GPS altitude measurement by the GPS 12 to the atmospheric pressure altitude measurement using the pressure sensor 10 based on the altitude change amount and the temperature change amount. For example, when the altitude change amount is larger than the predetermined altitude change amount and the temperature change amount is smaller than the predetermined temperature change amount, that is, when the GPS altitude is changing rapidly, the rapid temperature change Is not seen, the CPU 4 switches the GPS altitude measurement by the GPS 12 to the atmospheric pressure altitude measurement using the pressure sensor 10. Then, the recording of the barometric altitude log data is resumed, and the display on the LCD display unit 8 is switched from the simple display of the GPS altitude to the numerical display of the barometric altitude.

  On the other hand, when the amount of change in altitude is smaller than the predetermined amount of change in altitude and the amount of change in temperature is smaller than the predetermined amount of change in temperature, that is, when there is no sudden change in either GPS altitude or temperature In other words, the CPU 4 continues the GPS altitude measurement by the GPS 12 without switching to the atmospheric pressure altitude measurement using the pressure sensor 10. In this case, log data is not recorded, and simple display of the GPS altitude on the LCD display unit 8 is continued. As described above, when the GPS altitude measurement by the GPS 12 is not properly performed, the operator can know the altitude of the current self-position as a guide by switching to the barometric altitude measurement using the pressure sensor 10. it can.

  In the above-described embodiment, when the atmospheric pressure altitude is not reliable, the altitude altitude measurement using the pressure sensor 10 may be continued without switching to the GPS altitude measurement by the GPS 12. In this case, the recording as the log data of the atmospheric pressure altitude is switched to the recording using the simple log data similar to the case where the GPS altitude is recorded as the log data. Further, the display on the LCD display unit 8 is switched to the simple display similar to the case of displaying the GPS altitude. As a result, the barometric altitude can always be displayed on the LCD display unit 8.

  In the above-described embodiment, when the atmospheric pressure altitude is not reliable, a warning message such as “There is a possibility that the altitude is not correctly measured!” May be displayed on the LCD display unit 8.

  In the above-described embodiment, when the power is turned on, the operator may be able to select which of the pressure sensor 10 and the GPS 12 is used for altitude measurement. For example, when the power is turned on, the CPU 4 displays a selection screen on the LCD display unit 8 for selecting whether the altitude display is a numerical display or a simple display. Here, when the numerical display is selected by the operator, the CPU 4 starts atmospheric pressure altitude measurement using the pressure sensor 10. On the other hand, when the simple display is selected by the operator, the CPU 4 starts GPS altitude measurement by the GPS 12.

DESCRIPTION OF SYMBOLS 2 ... Digital camera, 4 ... CPU, 6 ... Image pick-up element, 8 ... LCD display part, 10 ... Pressure sensor, 12 ... GPS, 14 ... Temperature sensor, 16 ... Information storage part

Claims (9)

A pressure sensor for detecting atmospheric pressure;
A temperature sensor for detecting the temperature;
A first measurement unit for measuring altitude based on a detection value by the pressure sensor;
A second measuring unit for measuring altitude by a positioning signal;
An imaging apparatus comprising: a control unit that changes the altitude measurement by the first measurement unit to the altitude measurement by the second measurement unit according to the temperature. The imaging apparatus according to claim 1,
The control unit is an imaging device that performs the measurement of the altitude by the second measurement unit when a change amount of the temperature detected by the temperature sensor is larger than a predetermined change amount. The imaging apparatus according to claim 1, wherein:
An imaging apparatus that resumes altitude measurement by the first measuring unit when the altitude cannot be measured by the second measuring unit. The imaging apparatus according to any one of claims 1 to 3,
A display mode that displays at least one of the altitude measured by the first measuring unit and the altitude measured by the second measuring unit, and the altitude measured by the second measuring unit is different from the altitude measured by the first measuring unit. The imaging device provided with the display part displayed by. The imaging apparatus according to claim 4,
The display unit displays an altitude measured by the first measuring unit as a numerical value, and displays an altitude measured by the second measuring unit as a graph. The imaging apparatus according to any one of claims 1 to 5,
A recording unit for recording the altitude;
The recording unit is an imaging apparatus that stops the recording of the altitude measured by the second measuring unit. A pressure sensor for detecting atmospheric pressure;
A temperature sensor for detecting the temperature;
A first measuring unit for measuring altitude based on a detection value by the pressure sensor;
A second measuring unit for measuring altitude by a positioning signal;
A control unit that measures the altitude by the first measurement unit when a change amount of the altitude measured by the second measurement unit is larger than a predetermined change amount and the change amount of the temperature is smaller than a predetermined change amount; An imaging apparatus comprising: The imaging apparatus according to claim 7,
The control unit is an imaging device that continues high-level measurement by the second measurement unit when the first measurement unit is not highly reliable. The imaging device according to any one of claims 1 to 8,
The imaging device, wherein the positioning signal is a signal received from a GPS satellite.

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