JP2011203159A - Infrared imaging device, and display method of infrared image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an infrared imaging device and a display method of an infrared image for displaying the infrared image so that a pilot can easily recognize a specific object acting as an obstacle during the taking-off and landing or the flight of an aircraft.SOLUTION: This infrared imaging device to be mounted in the aircraft is equipped with at least: a detection section that is fixed to the aircraft and detects infrared rays radiated from a subject; a processing section for generating two-dimensional temperature information of the subject based on a signal sequentially outputted from the detection section; and a display section for displaying the infrared image based on the two-dimensional temperature information. The processing section extracts a specific object preset from the subject, based on the two-dimensional temperature information, sets the temperature information of the whole or a part of the specifying object to a predetermined high value, and allows identification of the specifying object.

Description

  The present invention relates to an infrared imaging device and an infrared image display method, and more particularly, to an infrared imaging device mounted on an aircraft such as a helicopter or a small airplane, and an infrared image display method that supports the operation of the aircraft.

  The infrared imaging device detects infrared rays emitted from an object, and has a feature that an image can be acquired at night or in bad weather with poor visibility. In view of this, an infrared imaging device is mounted on an aircraft such as a helicopter or a small airplane for medical use, firefighting disaster prevention, and security, and an infrared image captured by the infrared imaging device is displayed and used for operation support.

  Such an infrared imaging device includes a detection unit that detects an infrared ray emitted from a subject by imaging a traveling direction of an aircraft, a processing unit that processes a signal output from the detection unit, and a display unit that displays an infrared image Etc. The detection unit includes a condensing optical system and a detector, and is fixed to the aircraft by a mount.

  In the infrared imaging device, the infrared light emitted from the target is condensed on the detector by the condensing optical system, and the condensed infrared light is converted into an electric signal by the detector and sent to the processing unit. An electrical signal is converted into temperature information to generate two-dimensional temperature information, and an infrared image based on the two-dimensional temperature information is displayed on the display unit. Then, the pilot identifies the target as an operational index or the target as an obstacle from the infrared image, and uses them to control the aircraft.

  As an infrared imaging device mounted on such a helicopter, for example, in Patent Document 1 below, an airframe that can move in the air, an airframe position specifying unit that specifies the position of the airframe, Photographing means for photographing the target, direction detecting means for detecting a direction in which the photographing means is directed to the aircraft, and ground surface recording means for recording data representing a three-dimensional position of the ground surface And, in response to the output from the aircraft position specifying means, imaging means, direction detection means and ground surface recording means, calculate the intersection of the straight line extending from the position of the aircraft in the direction facing the imaging means and the ground surface, A position specifying device including an arithmetic processing means for specifying the position of a target is disclosed.

JP-A-8-285590

  Here, the infrared image is an image in which the gradation is changed according to the temperature of the object (for example, in the case of monochrome display, the high temperature portion is white, the low temperature portion is black, in the case of pseudo color, the high temperature portion is red, and the low temperature portion is Therefore, even an object that is invisible or difficult to see with the naked eye can be detected. Therefore, the aircraft can be safely operated by using the infrared image at the time of take-off and landing of the aircraft and at the time of flight, particularly at the time of take-off and landing at the time of night and poor visibility and at the time of flight.

  For example, buildings and other aircraft, people, etc. near takeoff and landing points (for example, runways and heliports) have a temperature difference from the background of the sky, ground surface, distant objects, etc., and can be identified with infrared images, Aircraft pilots can take off and land the aircraft using these as indicators.

  In addition, buildings with relatively large traveling directions have temperature differences from the background such as the sky, ground surface, and distant objects, and can be identified by infrared images. Can fly safely.

  On the other hand, in the infrared image, the object with high temperature is white in black and white display and red in pseudo color, but the temperature of the building near the takeoff / landing point and other aircraft, people, and relatively large traveling direction of the aircraft is sufficient. If not, they will not be displayed prominently. Therefore, the aircraft pilot cannot easily identify the objects that are obstructed during take-off and landing or flight (collectively referred to as specific objects), and cannot operate the aircraft safely. was there.

  The present invention has been made in view of the above-mentioned problems, and its main purpose is to display an infrared image so that a pilot can easily recognize a specific target that becomes an obstacle during take-off and landing of an aircraft or flight. It is an object to provide an infrared imaging device and an infrared image display method that can perform the above-described process.

  In order to achieve the above object, the present invention provides an infrared imaging device mounted on an aircraft, which is fixed to the aircraft and detects infrared rays emitted from a subject, and is sequentially output from the detection unit. At least a processing unit that generates two-dimensional temperature information of the subject based on a signal; and a display unit that displays an infrared image based on the two-dimensional temperature information, the processing unit including the two-dimensional temperature information The specific target set in advance from the subject is extracted, and all or part of the temperature information of the specific target is set to a predetermined high value so that the specific target can be identified.

  The present invention is also a method for displaying an infrared image using an infrared imaging device mounted on an aircraft, wherein the first step of detecting infrared radiation emitted from a subject using a detection unit fixed to the aircraft. A second step of generating two-dimensional temperature information of the subject based on signals sequentially output from the detection unit, and extracting a specific target set in advance from the subject based on the two-dimensional temperature information A third step, a fourth step in which all or a part of the temperature information of the specific target is set to a predetermined high value so that the specific target can be identified, and an infrared image based on the two-dimensional temperature information And a fifth step of displaying.

  According to the infrared imaging device and the infrared image display method of the present invention, it is possible to display an infrared image so that a pilot can easily recognize a specific target that becomes an obstacle during take-off and landing of an aircraft or flight.

  The reason is that the infrared imaging device uses a two-dimensional temperature information of the subject generated based on a signal output from the detection unit, and follows a predetermined rule to a building or other aircraft, person, aircraft near the takeoff / landing point Because a specific target that becomes an obstacle during takeoff and landing or flight of a building with a relatively high traveling direction is extracted, the temperature information of the specific target is set to a predetermined high value, and the specific target is displayed in an identifiable manner. is there.

  In addition, when the specific object is extracted from the two-dimensional temperature information, the infrared imaging device issues a warning notifying the pilot that the specific object has been extracted.

It is a perspective view showing typically the composition of the helicopter concerning one example of the present invention. It is a block diagram which shows the structure of the infrared imaging device which concerns on one Example of this invention. It is a circuit diagram which shows the structure of the detector which concerns on one Example of this invention. It is a block diagram which shows the structure of the process part which concerns on one Example of this invention. It is a block diagram which shows the structure of the calculating part contained in the process part which concerns on one Example of this invention. It is a flowchart figure which shows the display procedure of the infrared image using the infrared imaging device which concerns on one Example of this invention. It is a figure which shows an example of the infrared image (image of the vicinity of a takeoff and landing point) imaged with the infrared imaging device which concerns on one Example of this invention. It is a figure which shows an example of the image processed so that the specific object (building, illumination lamp) of the infrared image of FIG. 7 could be identified. It is a figure which shows the other example of the infrared image (image of the advancing direction of an aircraft) imaged with the infrared imaging device which concerns on one Example of this invention. It is a figure which shows an example of the image processed so that the specific object (high building) of the infrared image of FIG. 9 could be identified.

  As shown in the background art, an infrared imaging device is mounted on an aircraft such as a helicopter or a small airplane, and an infrared image acquired by imaging a traveling direction is used for operation support. However, since the infrared image is displayed so that a high-temperature object is conspicuous, in the situation where various objects of various temperatures exist, a building near another takeoff and landing point, another aircraft, a person, and a relatively moving direction of the aircraft There is a problem that it is difficult to identify a specific object that becomes an obstacle during take-off and landing of an aircraft such as a high building or during flight.

  Here, when viewed from an aircraft near the surface at the time of takeoff and landing, the sky near the ground and the surface of the building near the takeoff and landing point is the background, but the temperature of the sky is very low, and the temperature of the ground surface such as the runway is Since it is almost uniform, the boundary can be specified.

  In addition, when viewed from an aircraft near the surface at the time of takeoff and landing, other aircraft and people near the takeoff and landing point are in the background of the sky, the ground surface, buildings, etc., but the temperature of the sky is very low, and the land such as a runway The temperature of the surface is almost uniform, and if the material is different, the emissivity and the way of warming / cooling change, resulting in a temperature difference. Therefore, the boundary can be specified.

  In addition, when viewed from an aircraft flying in the low sky, a relatively high-rise building has a sky or a distant object in the background, but the temperature of the sky is very low, and infrared radiation emitted from a distant object Is absorbed according to the distance and the temperature is displayed low, so the boundary can be specified.

  Furthermore, buildings are generally composed of relatively long straight lines and curves, and airplanes and helicopters such as airplanes and helicopters have a characteristic shape, so that they can be identified by a known pattern recognition technique.

  Therefore, in one embodiment of the present invention, the two-dimensional temperature information of the subject generated based on the signal output from the detection unit is used to compare the direction of travel of a building or other aircraft, person, or aircraft near the takeoff and landing point The specific target that becomes an obstacle during takeoff and landing or flight of an aircraft such as a high-rise building is extracted, the temperature of the specific target's outline and internal pixels is set to a predetermined high value, and the specific target is emphasized to infrared Display an image. When a specific target is extracted, a warning is given to the pilot that the specific target has been extracted so that the specific target is not overlooked.

  Thereby, the pilot can easily identify a specific target that becomes an obstacle at the time of takeoff and landing of the aircraft or flight from an infrared image in which various targets are displayed, and can safely control the aircraft.

  In order to describe the above-described embodiment of the present invention in further detail, an infrared imaging apparatus and an infrared image display method according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view schematically illustrating the configuration of a helicopter according to an embodiment of the present invention, and FIG. 2 is a block diagram schematically illustrating the configuration of an infrared imaging device. 3 is a circuit diagram showing the configuration of the detector, FIG. 4 is a block diagram showing the configuration of the processing unit, and FIG. 5 is a block diagram showing the configuration of the arithmetic unit in the processing unit. FIG. 6 is a flowchart showing a procedure for displaying an infrared image using the infrared imaging apparatus of the present embodiment. FIGS. 7 to 10 are infrared images captured using the infrared imaging apparatus of the present embodiment. FIGS. 7 and 9 are diagrams showing examples of images before processing, and FIGS. 8 and 10 are images after processing.

  As shown in FIG. 1, the infrared imaging apparatus 20 of this embodiment is a helicopter or a small airplane such as a medical, fire-fighting, and security equipment that is used at night or in an environment with poor visibility (in this embodiment, Helicopter 10).

  As shown in FIG. 2, the infrared imaging device 20 is fixed to a predetermined position of the helicopter 10 (for example, the bottom of the helicopter 10) by a mount 24, and infrared rays emitted from the subject by imaging the traveling direction of the helicopter 10. Detecting unit 21 and processing the signal output from detecting unit 21 to generate two-dimensional temperature information of the subject, and a building or other aircraft near the takeoff and landing point, a relatively high direction of travel A processing unit 25 that performs processing that makes it easy to identify an object (specific target) that becomes an obstacle during take-off / landing or flight of an aircraft such as a building, a display unit 26 that displays an infrared image based on two-dimensional temperature information, and Accordingly, the operation unit 27 is configured to perform an operation such as selection of a specific target. The detection unit 21 includes a condensing optical system 22 such as a lens and a mirror, and a detector 23 that converts incident infrared light into an electrical signal.

  The traveling direction of the helicopter 10 includes not only the front surface of the helicopter 10 but also the upper, lower, and lateral sides of the front surface. Moreover, in FIG. 2, although the detection part 21 and the process part 25 are comprised separately, you may comprise the detection part 21 and the process part 25 integrally. In the present embodiment, the detection unit 21 captures the traveling direction of the helicopter 10, but the capturing direction is not limited to the traveling direction, and for example, a configuration may be employed in which the lower part of the helicopter 10 is captured.

  Details of the detector 23 and the processing unit 25 will be described below.

[Detector]
As shown in FIG. 3, the detector 23 includes an infrared detection element in which a plurality of pixels are arranged in a two-dimensional matrix, a signal processing unit that processes a signal from the infrared detection element, and the like. Consists of an internal circuit built in the substrate and an external circuit provided outside the substrate.

  Each pixel of the infrared detection element includes, for example, a temperature resistance element such as a bolometer 23a and a selection element such as a MOS transistor 23b. The source of the MOS transistor 23b is connected to GND, and the drain of the MOS transistor 23b is connected to the bolometer 23a. The gate of the MOS transistor 23b is connected to the horizontal signal line 23c. Further, a transfer gate 23g composed of a P channel MOS transistor, an N channel MOS transistor, and the like is connected between the vertical signal line 23d and the output terminal OUT.

  The horizontal signal line 23c is sequentially selected by the vertical shift register 23e and the AND circuit 23h, and the vertical signal line 23d is sequentially selected by the horizontal shift register 23f and the AND circuit 23i, and the selected horizontal signal line 23c and vertical signal line 23d are selected. The infrared video signal of the bolometer 23a of the pixel intersecting with is output from the output terminal OUT.

  In this embodiment, the two-dimensional temperature information is generated using an infrared detection element in which a plurality of pixels are two-dimensionally arranged. However, the pixel configuration of the infrared detection element is arbitrary, for example, a pixel May be configured to generate two-dimensional temperature information by scanning with an optical system such as a polygon mirror using an infrared detection element arranged in a one-dimensional array or an infrared detection element composed of one pixel. In addition, the infrared detection element is not limited to a temperature resistance element, and may be any element that can convert incident infrared rays into an electrical signal.

[Processing part]
As shown in FIG. 4, the processing unit 25 that processes the infrared video signal output from the detector 23 includes an amplifier 25a, an A / D converter 25b, a frame memory 25c, a calculation unit 25d, and a D / A. It consists of a converter 25e and the like.

  The amplifier 25a amplifies the infrared video signal from the detector 23 and passes it to the A / D converter 25b. The A / D converter 25b converts the infrared video signal into a digital signal and stores it in the frame memory 25c. The calculation unit 25d sequentially reads data from the frame memory 25c, refers to a prestored table, converts the digital signal of each pixel into temperature information, generates two-dimensional temperature information, and makes it easy to identify a specific target. Processing is performed and output to the D / A converter 25e. The D / A converter 25 e converts the digital signal into an analog display video signal and outputs it to the display unit 26.

  That is, the calculation unit 25d, which is a characteristic part of the infrared imaging device of the present embodiment, also functions as a specific target extraction unit and a specific target enhancement processing unit as shown in FIG.

  The specific target extraction unit follows a predetermined rule (specific details will be described later), based on the two-dimensional temperature information, a specific target that becomes an obstacle during takeoff and landing of the aircraft (for example, a building near the takeoff and landing point, relatively large equipment) , Other airplanes, helicopters, humans, etc.) and specific objects (for example, buildings, lighthouses, steel towers, electric wires, other airplanes, helicopters, etc., which are relatively high in the direction of travel) that are obstructed when the aircraft is flying.

  The specific target enhancement processing unit emphasizes all or part of the outline or the inside of the specific target extracted by the specific target extraction unit (that is, sets the pixel temperature information to a predetermined high value) to identify the specific target Make it easier to do.

  The processing unit 25 and the calculation unit 25d are not limited to the configurations shown in FIGS. 4 and 5, and generate two-dimensional temperature information based on a signal output from the detector 23 and make it easy to identify a specific target. Any configuration that can execute the process may be used.

  Next, a procedure for displaying an infrared image using the infrared imaging apparatus of the present embodiment will be specifically described with reference to a flowchart of FIG. 6 and infrared image examples of FIGS. 7 to 10. In the following description, the specific target (one or more) may be set in advance by the operation unit 27, and typical shapes of specific targets such as airplanes and helicopters such as airplanes and people are registered in advance. It is assumed that

  When the pilot or the like of the helicopter 10 activates the infrared imaging device when the helicopter 10 takes off, during flight, or landing, or when the infrared imaging device automatically activates in conjunction with the activation of the helicopter 10, in step S101, the detection unit 21 images the traveling direction of the helicopter 10 to detect infrared rays emitted from the subject, and transmits an infrared video signal to the processing unit 25.

  Next, in step S102, the processing unit 25 amplifies the infrared video signal received from the detection unit 21, performs A / D conversion, stores it in the frame memory, and then converts the data of each pixel of the detector 23 into temperature information. Then, two-dimensional temperature information is generated. Then, the processing unit 25 (specific target extraction unit) extracts a predetermined specific target from the two-dimensional temperature information.

  For example, as shown in FIG. 7, when imaging the front from the helicopter 10 near the ground surface during takeoff and landing, the buildings and illumination lights built near the takeoff and landing point are the background of the sky and the ground surface (runway, etc.) Since the sky has a sufficiently low temperature because there is almost no infrared rays radiated from the object, and the runway has a nearly uniform temperature, a straight line or curve of a certain length with a temperature difference from these is extracted. Then, the shape composed of them is recognized as a pattern and specified as a building or an illumination lamp.

  In addition, other aircraft in the vicinity of the takeoff and landing point are the background of the sky, the ground surface (runway, etc.), buildings, etc. As mentioned above, the sky has a sufficiently low temperature because there is almost no infrared radiation emitted from the object. The runway has a nearly uniform temperature, and because the aircraft and the building are made of different materials, there is a temperature difference depending on the emissivity and how the air is warmed / cooled, and the aircraft has a characteristic shape. Therefore, an object having a specific shape (a typical shape of an aircraft stored in advance) having a temperature difference from these is recognized as a pattern and recognized as another aircraft.

  In addition, the person near the take-off and landing point is the ground surface (runway, etc.), buildings, and other aircraft, but the person has a temperature difference from the runway, buildings, other aircraft, etc. Therefore, an object having a specific shape (a typical shape of a person stored in advance) having a temperature difference from these is recognized as a person by pattern recognition.

  Also, as shown in FIG. 9, when the traveling direction is imaged when the helicopter 10 is flying in the low sky, a relatively large building becomes the background of the sky or a distant object, but as described above, the sky is an object. Because there is almost no infrared rays radiated from the object, the temperature is sufficiently low, distant objects have short straight lines and curves, and the infrared rays emitted from the distant objects are absorbed according to the distance and the temperature is low Since these are recognized, a straight line or a curve having a predetermined length having a temperature difference from these is extracted, and the shape formed from these is recognized as a pattern and specified as a building.

  If the specific target is not extracted in step S102 (in the case of No in step S103), the process proceeds to step S106, and the processing unit 25 monitors the two-dimensional temperature information that is not processed for the specific target. The display unit 26 displays an infrared image based on the two-dimensional temperature information, and if the end of imaging is not instructed (No in step S107), the process returns to step S101 and the same. Repeat the process.

  On the other hand, when the specific target is extracted in step S102 (Yes in step S103), in step S104, the processing unit 25 (specific target emphasis processing unit) extracts the contour of the extracted specific target or all or part of the inside. The pixel temperature information is set to a predetermined high value (for example, the temperature of the highest gradation), and processing for easily identifying the specific target is performed.

  Next, if necessary, in step S105, a warning is given to inform the pilot that the specific target has been extracted. This warning method is arbitrary. For example, a warning message may be displayed on the display unit 26 such as a monitor that displays an infrared image in step S106, or a warning message may be output from a speaker provided in the helicopter 10 or the like. Alternatively, a warning lamp provided in the helicopter 10 may be turned on / flashed.

  Thereafter, in step S106, the processing unit 25 outputs the two-dimensional temperature information obtained by performing the process on the specific target to a display unit 26 such as a monitor, and the display unit 26 performs infrared image based on the two-dimensional temperature information. Is displayed and if the end of imaging is not instructed (No in step S107), the process returns to step S101 and the same processing is repeated.

  For example, in the image of FIG. 7, when a building and an illumination lamp are extracted as a specific target, the specific target is emphasized and displayed as shown in FIG. 8A (for example, white, pseudo color in black and white display) In red). Thereby, it becomes possible to easily identify a specific target that becomes an obstacle during takeoff and landing, and the helicopter 10 can be safely taken off and landing.

  Further, as shown in FIG. 8B, all or a part of the specific target may be painted with white in black and white display, red with pseudo color, or by painting a small specific target (for example, an illumination lamp). The helicopter 10 can be safely taken off and landing without overlooking a specific target that becomes an obstacle during takeoff and landing.

  In addition, when a relatively high building is extracted as a specific target in the image of FIG. 9, the outline of the specific target is emphasized and displayed as shown in FIG. In red). Further, as in FIG. 8B, the inside of the specific object is filled with white in monochrome display and red in pseudo color. Thereby, it becomes possible to easily identify a specific target that becomes an obstacle during flight, and the helicopter 10 can fly safely.

  In addition, when there are many relatively high buildings and all of them are highlighted, it is conceivable that the identifiability of the specific object deteriorates. In such a case, as shown in FIG. 10B, only the specific target in the direction in which the helicopter 10 flies (near the center of the image) may be highlighted, or the specific target may be processed geometrically. The size and the distance from the helicopter 10 may be specified, and a predetermined number of buildings may be highlighted in order from the highest to the lowest. Thereby, the helicopter 10 can be safely flying while avoiding buildings that are likely to become obstacles.

  8 and 10 are examples of the infrared image of the present embodiment, and any display form may be used as long as the specific target can be easily identified on the screen.

  For example, in FIG. 8 and FIG. 10, the entire specific target is highlighted. However, when the helicopter 10 takes off and landing or in flight, the obstacle is mainly the upper part of the specific target, so only the upper part of the specific target is highlighted. It may be displayed.

  In addition, the specific objects do not necessarily have to be displayed at the same temperature (gradation). For example, the temperature (gradation) is changed according to the type and size of the specific object, the distance from the helicopter 10 (for example, the size). A specific target having a larger distance or a specific target having a closer distance may be displayed at a higher temperature. By performing such processing, it is possible to easily identify a specific target that is more likely to become an obstacle.

  In the above flow, when a specific target is extracted, an image in which a specific image is emphasized after a warning is displayed, but this warning may be performed when an image in which a specific image is emphasized is displayed. The pilot has identified that the specific target has been extracted by intermittently highlighting the target (for example, displaying all or a part of the specific target in white in a monochrome display and red in a pseudo color at regular time intervals). May be warned.

  In addition, when taking off and landing or flying at night, it is difficult to visually identify the specific target, but the infrared imaging device uses infrared rays radiated by the specific target itself, not using reflection of sunlight. The specific object can be reliably identified even at night. In addition, it is difficult to visually identify the specific target even when fog and clouds are generated and the visibility is poor, but infrared light is more likely to pass through fog and clouds than visible light, so even when visibility is poor. A specific object can be reliably identified.

  Thus, according to the infrared imaging device 20 of the present embodiment, a specific target set in advance is extracted from the two-dimensional temperature information generated based on the signal output from the detection unit 21, and the target specific pixel of the subject is extracted. The temperature information is set to a predetermined high value and an infrared image highlighting the specific object is displayed, so that the specific object can be easily identified. Further, when a specific target is extracted, a warning is given to notify that the specific target has been extracted, so that oversight of the specific target can be prevented in advance. And by these, helicopter 10 can be operated safely.

  In addition, this invention is not limited to the said Example, The structure and control method can be changed suitably, unless it deviates from the meaning of this invention.

  For example, in the above-described embodiment, the specific object is exemplified by a building near the takeoff / landing point, another aircraft, a person, and a building with a relatively high traveling direction. can do.

  Further, the wavelength of infrared rays detected by the infrared imaging device is not particularly limited, and a 3 to 5 μm band may be detected, an 8 to 12 μm band may be detected, or these may be combined. Further, an image obtained by combining an infrared image and a visible image may be processed / displayed.

  INDUSTRIAL APPLICABILITY The present invention can be used for an infrared imaging device mounted on an aircraft such as a medical helicopter or a small airplane for medical use, fire prevention and disaster prevention, and an infrared image display method in the infrared imaging device.

DESCRIPTION OF SYMBOLS 10 Helicopter 20 Infrared imaging device 21 Detection part 22 Condensing optical system 23 Detector 23a Bolometer 23b MOS transistor 23c Horizontal signal line 23d Vertical signal line 23e Vertical shift register 23f Horizontal shift register 23g Transfer gate 23h, 23i AND circuit 24 Mount 25 process Unit 25a amplifier 25b A / D converter 25c frame memory 25d arithmetic unit 25e D / A converter 26 display unit 27 operation unit

Claims (8)

An infrared imaging device mounted on an aircraft,
A detection unit that is fixed to the aircraft and detects infrared rays emitted from the subject, a processing unit that generates two-dimensional temperature information of the subject based on signals sequentially output from the detection unit, and the two-dimensional A display unit that displays an infrared image based on temperature information,
The processing unit extracts a specific target set in advance from the subject based on the two-dimensional temperature information, sets all or part of the temperature information of the specific target to a predetermined high value, and specifies the specific An infrared imaging device characterized in that an object can be identified. The specific object is a building in the vicinity of a takeoff and landing point that becomes an obstacle when the aircraft takes off and landing, or a building in a traveling direction that becomes an obstacle when the aircraft is flying,
The processing unit specifies a line having a predetermined length that is continuous at a substantially constant temperature from the two-dimensional temperature information, and extracts the building based on a shape composed of a plurality of the lines. The infrared imaging device according to claim 1. The specific object is another aircraft or person in the vicinity of the takeoff and landing point that becomes an obstacle at the time of takeoff and landing of the aircraft,
The said processing part identifies the shape similar to the shape memorize | stored previously from the said two-dimensional temperature information, Based on the said shape, the said other aircraft or a person is extracted, The Claim 1 characterized by the above-mentioned. Infrared imaging device.   4. The processing unit according to claim 1, wherein when the specific target is extracted from the two-dimensional temperature information, a warning is given to notify a pilot of the aircraft that the specific target has been extracted. The infrared imaging device according to any one of the above. An infrared image display method using an infrared imaging device mounted on an aircraft,
A first step of detecting infrared rays emitted from a subject using a detection unit fixed to the aircraft;
A second step of generating two-dimensional temperature information of the subject based on signals sequentially output from the detection unit;
A third step of extracting a specific target preset from the subject based on the two-dimensional temperature information;
A fourth step of setting all or a part of the temperature information of the specific target to a predetermined high value so that the specific target can be identified;
And a fifth step of displaying an infrared image based on the two-dimensional temperature information. The specific object is a building in the vicinity of a takeoff and landing point that becomes an obstacle when the aircraft takes off and landing, or a building in a traveling direction that becomes an obstacle when the aircraft is flying,
In the third step, a line having a predetermined length that is continuous at a substantially constant temperature is identified from the two-dimensional temperature information, and the building is extracted based on a shape constituted by a plurality of the lines. The infrared image display method according to claim 5. The specific object is another aircraft or person near the takeoff and landing point that becomes an obstacle when taking off and landing of the aircraft,
6. In the third step, a shape similar to a shape stored in advance is specified from the two-dimensional temperature information, and the other aircraft or person is extracted based on the shape. The display method of the infrared image of description.   8. In the third step, when the specific target is extracted from the infrared image, a warning is given to notify a pilot of the aircraft that the specific target has been extracted. An infrared image display method according to claim 1.

Images