WO2014190917A1

WO2014190917A1 - Portable thermal image capturing device and analysis device, and thermal image capturing method and analysis method

Info

Publication number: WO2014190917A1
Application number: PCT/CN2014/078748
Authority: WO
Inventors: 王浩; 薛晓勇
Original assignee: Wang Hao
Priority date: 2013-05-29
Filing date: 2014-05-29
Publication date: 2014-12-04
Also published as: CN104215337A

Abstract

The portable thermal image capturing device and analysis device, and thermal image capturing method and analysis method of the present invention relate to the fields of portable thermal image capturing devices and thermal image capturing applications. Thermal image capturing devices of the prior art are mainly of the photographic type, and, during use, capture speed can be slow and of low effectiveness, making it difficult to measure a moving subject and difficult to represent large-scale subjects. For example, in respect of dynamic thermal imaging files containing various objects captured by means of dynamic capturing, the prior art does not set forth methods for how to ensure the effectiveness of analysis of capture data or how to perform rapid analysis processing. The present invention provides a thermal image capturing device and analysis device, and thermal image capturing method and analysis method. Thermal image data frames (AD value) are continually captured by a capturing component, and continual recording occurs in accordance with a defined frequency for recording frames. In respect of a dynamic thermal imaging file, characteristics data corresponding to characteristics analysis conditions are obtained in accordance with defined characteristics analysis conditions, a characteristics curve is generated, and analysis is rapidly executed.

Description

Portable thermal image capturing device, analyzing device and thermal image capturing method and analysis method

The thermal image capturing device, the analyzing device, and the thermal image capturing method and analysis method of the present invention relate to a portable thermal image capturing device and an application field of thermal image capturing.

Background technique

At present, a portable thermal image capturing device is widely used in various industries; a prior art thermal image capturing device is disclosed in the published patent document No. 00254441.

However, the prior art has the following problems in use: At present, the thermal image capturing device is mainly a camera type, and the infrared shooting device of the photographing mode is slow in shooting speed, low in efficiency, and difficult to measure a moving target, for a large target. It is difficult to describe that when the camera button is pressed, the recorded thermal image file is a static thermal image file.

Since the thermal image data frame (thermal image AD value data frame) has a large amount of data (depending on the detector of different pixels, the data volume per frame is about 150-500K), in order to achieve dynamic recording, the prior art thermal image shooting The device can convert the thermal image data frame into pseudo color image data (to reduce the amount of data), and then perform dynamic recording; but the recorded dynamic thermal image file can only be viewed, for example, for subsequent analysis, due to the loss of the original AD Value information, unable to obtain accurate analysis results.

Further, as a dynamic thermal image file containing various subjects obtained by dynamic shooting, the prior art does not mention a method of performing rapid analysis processing. When the user needs to quickly know the state of the subject in a large number of thermal image data frames, the technique of drawing and analyzing the static thermal image files one by one is very inconvenient because of the large amount of data of the dynamic thermal image file. And the operation is troublesome.

Therefore, it is understood that a thermal imaging apparatus is required which can achieve continuous recording of thermal image data frames, thereby achieving the advantageous effect of improving shooting efficiency. There is also a need for a thermal image analysis device for rapid analysis of dynamic thermal image files.

Summary of the invention

The invention provides a thermal image capturing device, an analyzing device, a thermal image capturing method and an analysis method, and continuously acquires a thermal image data frame according to a shooting unit, and continuously records the acquired thermal image data frame to a nonvolatile according to a predetermined recording frame rate. Storage media. The thermal image data frame is an AD value data outputted by the infrared detector output electrical signal after being replaced by the AD.

To this end, the present invention adopts the following technical solution, a portable thermal imaging device, including:

a photographing unit, configured to continuously capture a thermal image data frame;

a display control unit, configured to cause an infrared thermal image obtained by displaying a thermal image data frame through a predetermined process;

An operation unit, configured to perform a dynamic recording operation;

a recording unit, configured to continuously record the acquired thermal image data frame and/or the obtained thermal image data frame after the specified processing, and/or obtain the thermal image data frame obtained according to the dynamic recording operation generated by the dynamic recording operation The thermal image data frame is subjected to a predetermined processing to obtain a temperature value data array, and the thermal image data frame is an AD value data.

The analysis device of the present invention comprises:

a selection unit, configured to select one or more dynamic thermal image files;

The analyzing unit is configured to analyze the specified frame in the selected dynamic thermal image file according to the specified feature analysis condition, and obtain the feature data corresponding to the feature analysis condition;

The characteristic curve generating unit is configured to form a characteristic curve formed by connecting the feature curve or the feature point formed by the feature point in the feature curve coordinate system based on the frame timing information of the predetermined frame and the corresponding feature data.

A thermal image capturing method of a portable thermal imaging device of the present invention includes: a shooting step for continuously capturing a thermal image data frame;

a display control step for causing an infrared thermal image obtained by displaying a thermal image data frame through a prescribed process;

Operation steps for performing a dynamic recording operation;

a recording step, configured to continuously record the acquired thermal image data frame and/or the obtained thermal image data frame after the specified processing of the thermal image data frame and/or obtain the dynamic recording instruction generated based on the dynamic recording operation The thermal image data frame is subjected to a predetermined processing to obtain a temperature value data array, and the thermal image data frame is an AD value data.

Analytical method of the present invention, including

a selection step for selecting one or more dynamic thermal image files;

An analyzing step, configured to analyze a specified frame in the selected dynamic thermal image file according to the specified feature analysis condition, and obtain feature data corresponding to the feature analysis condition;

The characteristic curve generating step is configured to form a characteristic curve formed by the feature points or a characteristic curve formed by connecting the feature points in the feature curve coordinate system based on the frame timing information of the predetermined frame and the corresponding feature data.

Other aspects and advantages of the invention will be set forth in the description which follows.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a schematic configuration of a thermal imaging device 100 according to a first embodiment of the present invention.

Fig. 2 is a schematic view showing the outline of the thermal image capturing apparatus 100 of the embodiment.

Fig. 3 is a control flow chart of the thermal image capturing apparatus of the first embodiment.

Fig. 4 is a control flow chart of the thermal image capturing apparatus of the second embodiment.

Fig. 5 is a view showing an example of display of the display interface of the analyzing device of the third embodiment.

Fig. 6 is a display example showing two characteristic curves in the same characteristic curve coordinate system.

Fig. 7 is a control flow chart of the analyzing device of the third embodiment.

Fig. 8 is another display example of the display interface of the analyzing device of the third embodiment.

detailed description

Exemplary embodiments of the present invention will now be described in detail in accordance with the accompanying drawings. It is to be noted that the embodiments described below are intended to better understand the present invention, and thus the scope of the present invention is not limited, and various forms within the scope of the present invention may be changed.

Example 1

The thermal image capturing apparatus 100 of the first embodiment continuously records the acquired thermal image data frame to the nonvolatile storage medium at a predetermined recording frame rate based on the thermal image data frame obtained by the imaging unit 1.

Fig. 1 is a block diagram showing a schematic configuration of a thermal imaging device 100 according to an example 1 of the present invention.

Specifically, the thermal imaging device 100 includes an imaging unit 1, a temporary storage unit 2, a hard disk 3, a communication unit 4, an image processing unit 5, a memory card unit 6, a display unit 7, a control unit 8, an operation unit 9, and a control unit. 8 is connected to the corresponding portion of the above by the control and data bus 10; the control unit 8 is responsible for the overall control of the thermal image capturing apparatus 100.

The imaging unit 1 is composed of an optical member (not shown), a lens driving member, an infrared detector, a signal preprocessing circuit, and the like. The optical component consists of an infrared optical lens for focusing the received infrared radiation onto the infrared detector. The lens driving section drives the lens in accordance with a control signal of the control section 8 to perform a focusing or zooming operation. In addition, it can also be a manually adjusted optical component. Infrared detectors, such as infrared or non-refrigerated infrared focal plane detectors, convert infrared radiation through optical components into electrical signals. The signal pre-processing circuit comprises a sampling circuit, an AD conversion circuit, a timing trigger circuit, etc., and the signal output from the infrared detector is sampled and processed in a predetermined period, and converted by the AD conversion circuit to obtain a digital thermal image data frame. The thermal image data frame contains AD value data such as binary data of 14 bits or 16 bits. Thermal image data frames are not limited to infrared The detector's native resolution can also be lower or higher than the infrared detector resolution. In Embodiment 1, the photographing section 1 is used as an example of an acquisition section for acquiring a thermal image data frame.

The temporary storage unit 2 is a volatile memory such as a RAM or a DRAM for temporarily storing a thermal image data frame obtained by photographing. As a buffer memory for temporarily storing the thermal image data frame output from the imaging unit 1, for example, the following processing is repeated, and the acquired thermal image data frame is temporarily stored for a predetermined time portion, and acquired by the acquisition unit (imaging unit 1) At the time of the frame, the old thermal image data frame is stored after the old frame is deleted. At the same time, it functions as a work memory of the image processing unit 5, the control unit 8, and the like, and temporarily stores the processed data. The present invention is not limited thereto, and a memory, a register, and the like included in the corresponding processor such as the image processing unit 5 and the control unit 8 may be interpreted as a temporary storage medium.

The hard disk 3 stores programs for control and various data used in various parts of the control. In addition, the hard disk 3 can also be used to continuously record data such as acquired thermal image data frames.

The communication unit 4 is, for example, a communication device that connects the thermal image capturing device 100 to an external device in accordance with a communication specification such as USB, 1394, or network.

The image processing unit 5 performs predetermined processing on the thermal image data frame obtained by the imaging unit 1, and the processing of the image processing unit 5 is converted into a suitable display by correction, interpolation, pseudo color, synthesis, compression, decompression, and the like. Processing of data such as use and recording. For example, each time the display timing comes, a thermal image data frame obtained in a predetermined frame, for example, immediately obtained, is selected from a thermal image data frame temporarily stored in the temporary storage unit 2 for a predetermined time portion, and is pseudo-imaged. Color processing, obtaining image data of infrared thermal image; an embodiment of pseudo color processing, for example, determining a corresponding pseudo color table according to a range of thermal image data (AD value) of a thermal image data frame or a setting range of an AD value Range, the specific color value corresponding to the thermal image data in the pseudo color plate range is taken as the image data of the corresponding pixel position in the infrared thermal image. The image data obtained after the pseudo color processing by the image processing unit 5 is transferred to the temporary storage unit 2 used as a buffer memory. The image processing unit 5 can be realized by, for example, a DSP or another microprocessor or a programmable FPGA, or can be integrated with the processor of the control unit 8.

The display unit 7, for example, a liquid crystal display device for displaying the image data for display stored in the temporary storage unit 2 on the display unit 7. For example, in the shooting standby mode, the infrared thermal image generated by the captured thermal image data frame is continuously displayed; in the playback mode, the infrared thermal image generated by reading the recorded thermal image data frame from the hard disk 3 is displayed, and Various setting information is displayed. Not limited to this, the display unit 7 may be another display device that can be wired or wirelessly connected to the thermal image capturing device 100, and the thermal image capturing device 100 itself may have no display portion in the electrical configuration.

The control unit 8 controls the overall operation of the thermal image capturing apparatus 100, and stores a program for control and various data used for control of each part in a storage medium such as the hard disk 3. The control unit 8 is realized by, for example, a CPU, an MPU, a SOC, a programmable FPGA, or the like. The control unit 8 is a display control unit for causing the display unit to display an infrared thermal image obtained by a predetermined process of the thermal image data frame. The control unit 8 as a recording unit continuously records the acquired thermal image data frame at a predetermined recording frame rate.

Operation unit 9: for the user to perform various instruction operations such as dynamic recording operations (such as dynamic recording key 1), recording pause/continue (such as pause button 2) operations, or inputting setting information such as recording frame rate and other operations. The control unit 8 executes a corresponding program based on the operation signal of the operation unit 9. Further, the display unit 7 (with a touch screen) or a voice recognition unit (not shown) or the like can be used to implement the related operations.

After the power is turned on, the control unit 8 controls the overall operation of the thermal imaging device 100 and the control for executing the plurality of mode processes based on the control program stored in the hard disk 3 and various data used in the respective partial controls. The control unit 8 initializes the internal circuit, and then enters the standby shooting mode, that is, the imaging unit 1 captures and obtains a thermal image data frame, and the image processing unit 5 performs a predetermined process on the thermal image data frame captured by the imaging unit 1 and stores it in the temporary In the storage unit 2, the display unit 7 displays a real-time infrared thermal image. Referring to Fig. 3, the control flow of the thermal image capturing apparatus 100 will be described. The steps are as follows:

Step A01, acquiring a thermal image data frame, and transmitting the thermal image data frame obtained by the imaging unit 1 to the temporary storage unit 2; in step A02, reading the thermal image data obtained by the imaging unit 1 for instant shooting, for example, in the temporary storage unit 2. Frame, display processing, and display.

In step A03, it is judged whether there is an indication of dynamic recording (for example, whether the record key 1 is pressed)? If no, go back to step A01 and repeat the above steps; if yes, perform dynamic recording processing;

In step A04-A06, the dynamic recording processing is performed, that is, the thermal image data frame to be subjected to the recording processing is read from the predetermined area of the temporary storage unit 2, and written in the dynamic thermal image file created in the storage medium. In a preferred embodiment, the recording unit is configured to continuously capture the captured thermal image data frame in a non-volatile storage medium (such as the hard disk 3) by continuously recording the frame rate according to a predetermined recording frame rate.

Specifically, in an embodiment, in step A04, the heat stored in the temporary storage unit 2 is reached when a predetermined recording timing (time) (for example, a recording frame rate of 6 frames/second, 1/6 second) comes. Selecting and reading the thermal image data frame to be recorded in the data frame, for example, reading the thermal image data frame obtained by the instant shooting (the latest transmission to the temporary storage unit 2) from the predetermined area of the temporary storage unit 2, and then, in the step A05 performs a process such as correction, interpolation, cropping, conversion to temperature value, compression processing, or the like, or a plurality of processes; wherein step A05 may also be omitted; in step A06, the thermal image data frame or the necessary Additional information (such as the time of the thermal image data frame, the radiance of the shot, the temperature of the environmental parameter, the humidity, the shooting distance, the specified processing algorithm or the parameters related to the processing algorithm, etc.) are written in a storage medium such as the hard disk 3 The created dynamic thermal image file; the thermal image data frame contains AD value data. In another example, the additional information may also be temporarily stored in the temporary storage unit 2, and when the dynamic is finished, all of the dynamic thermal image files are written all at once, and the subsequent additional information can be quickly found in subsequent analysis.

In addition, the predetermined recording frame rate can also be implemented by means of decimation, etc., for example, it is assumed that the frame rate of the captured thermal image data frame is 30 Hz, and the predetermined recording frame rate is 6 frames/second, which can be extracted in 5 frames. One frame is used to implement a predetermined recording frame rate; in another example, for example, one frame of thermal image data frames obtained by processing the last five frames may be used.

The predetermined recording frame rate does not have to be fixed. For example, in a preferred embodiment, the thermal imaging device 100 further has a recording frame rate control unit for automatically starting when the recording processing speed does not reach the set recording frame rate. Perform adaptive control of the recording frame rate, or further prompt the user to change the recording frame rate.

In step A07, is it judged whether it is over?

If it is finished, in step A08, the necessary file additional information is written into the dynamic thermal image file to complete the dynamic thermal image file. For example, write to the header of the file generated when the dynamic thermal image file is created, or to the end of the file generated when the dynamic thermal image file is finished.

Among them, unlike the imaging of visible light, the thermal image data frame obtained by thermal imaging is mainly used for subsequent analysis, which ensures basic dynamic playback effect, and therefore can be at a lower frame rate (for example, less than 15 frames/second). Recording is performed at or below 10 frames/second or less than 6 frames/second, thereby ensuring dynamic recording processing of a thermal image data frame having a large amount of data.

In another processing mode, in step A05, the image data of the infrared thermal image obtained by the thermal image data frame (AD value data) and the temperature value data array obtained by the conversion are further subjected to compression processing, and then recording is performed. Preferably, the thermal image data frame is recorded, because various detailed parameters can be set for the subsequent conversion of the temperature value during the analysis to ensure accuracy and suitability for different applications.

Example 2 The difference from the first embodiment is that the thermal image capturing apparatus of the second embodiment is configured to continuously record the acquired thermal image data frame to a nonvolatile storage medium at a predetermined recording frame rate to generate a dynamic thermal image file of a predetermined size. .

Since the data amount of the thermal image data frame is large, although the recording of the thermal image data frame is performed at a small recording frame rate in Embodiment 1, in the shooting, the dynamic thermal image file finally obtained may still be too large, which is inconvenient. Subsequent management and processing of dynamic thermal image files.

Referring to Fig. 4, the control flow of the thermal image capturing apparatus 100 will be described. The steps are as follows:

Step B01, acquiring a thermal image data frame, and transmitting the thermal image data frame obtained by the imaging unit 1 to the temporary storage unit 2; in step B02, reading the thermal image data obtained by the imaging unit 1 for instant shooting in the temporary storage unit 2 Frame, display processing, and display.

In step B03, it is judged whether there is an indication of dynamic recording (for example, whether the dynamic recording key 1 is pressed)? If no, go back to step B01 and repeat the above steps; if yes, go to the next step;

In step B04, it is judged whether or not the predetermined recording timing is reached (for example, when the frame rate is 6 frames/second, 1/6 second)? If no, go back to step B01 and repeat the above steps; if yes, go to the next step;

Step B05, selecting and reading the thermal image data frame to be recorded from the thermal image data frame stored in the temporary storage unit 2, for example, reading the thermal image data frame to be subjected to the recording processing from a predetermined area of the temporary storage unit 2, for example The latest acquired thermal image data frame;

In step B06, a prescribed process such as a compression process or the like is performed; wherein step B06 may also be omitted;

In step B07, the thermal image data frame and the additional information are written in the dynamic thermal image file created in the storage medium.

Step B08, judging whether the specified dynamic thermal image file size is reached? If no, go to step B11; if not, go back to step B01; if yes, in step B09, write the necessary file additional information to the dynamic thermal image file to complete the dynamic thermal image file.

Step B 10, create a new dynamic thermal image file;

In step B11, it is judged whether it is over. If not, the process returns to step B01, and in step B07, the thermal image data frame and the additional information are written in a new dynamic thermal image file created in the storage medium. If it is over, the dynamic thermal image file is completed.

The dynamic thermal image file thus recorded is controlled to a specified size for subsequent file management. Obviously, when you delete a dynamic record after creating a new dynamic thermal image file, you can delete the file or generate an empty file.

Further, in order to reduce the amount of data of the recorded thermal image data frame, the control unit 8 functions as a pause control unit for responding to a prescribed operation (such as pressing the pause key 2), suspending the dynamic recording processing, and temporarily suspending the recording. In the state, in response to the specified operation (such as pressing the pause button 2 again), the dynamic recording processing is continued.

Example 3

For the dynamic thermal image file obtained by shooting, since the amount of data is very large (tens of thousands of frames), it is very time consuming and laborious to use the analysis method of the static thermal image file; in the embodiment 3, as an example of the analysis device The thermal image capturing apparatus 100 for processing a dynamic thermal image file is also applicable to a thermal image analyzing apparatus such as a personal computer or a personal digital processing apparatus with or without a thermal image capturing function.

The control section 8 performs control related to the analysis, wherein the control section 8 serves as a selection section that selects one or more dynamic thermal image files to be processed; as selected from a storage medium such as the hard disk 3.

The control unit 8 is configured to filter the thermal image data frame in the selected dynamic thermal image file according to a predetermined filtering condition; the filtering condition may be based on the number of sampling frames, the sampling interval, the frame additional information, or Associated information One or more of the levies data, a prescribed frame is obtained. As a filter condition, the thermal image data frame in the selected dynamic thermal image file is filtered to obtain a predetermined frame.

Wherein, the number of sample frames is displayed, for example, the total number of frames determined, and then the number of frames to be analyzed is selected, and then the frame to be analyzed is allocated according to a prescribed rule. For example, depending on the timing, the timing of these frames can usually be determined first.

Wherein, the sampling interval, for example, one frame is taken in a plurality of frames, for example, one frame is taken in 10 frames according to the frame timing information. The timing of these frames can usually be determined first.

The frame additional information or associated information, such as time added in the thermal image data frame, shooting parameters (such as ring temperature, distance, wind speed), device name, GPS information, feature data, etc., or other additional information set by the user. The timing can be determined after filtering.

The feature data, for example, analyzes the thermal image data frame in the selected dynamic thermal image file, and performs filtering according to the analyzed analysis result; and, as the filtered feature data, can be analyzed with the subsequent generated characteristic curve. The obtained feature data is processed for the same or different analysis.

Filtering the selected thermal image data frames can reduce the load on the processor during subsequent analysis, improve the speed of analysis, and the like. Obviously, it can also be filtered.

The control unit 8 is configured as an analysis unit for analyzing a predetermined frame in the selected dynamic thermal image file in accordance with a predetermined feature analysis condition to obtain feature data. The predetermined frame may be all the thermal image data frames in the dynamic thermal image file, or may be partial frames determined according to the filtering conditions in the dynamic thermal image file.

The specific embodiment of the analysis unit will be described by taking temperature analysis as an example. In Embodiment 3, the feature data is a temperature value obtained by temperature analysis, which is based on a feature analysis condition such as a highest temperature, an average temperature, a lowest temperature in a specific analysis region, or may be based on a feature analysis condition such as a different analysis. The temperature difference in the area.

The feature analysis conditions, such as the analysis region and the analysis mode related to the analysis, are analyzed by the analysis section based on the analysis region and the analysis mode determined by the feature analysis conditions. The analysis area represents a specific analysis area in a thermal image data frame, such as a point, a line, a surface, or an entire thermal image data frame as an analysis area. The analysis mode is, for example, calculating the highest temperature, the lowest temperature, the average temperature, the temperature difference between the different analysis areas, and the like in the analysis area. The analysis area and the analysis mode determined by the feature analysis condition may be preset, default, etc.; or the analysis unit further has an analysis area setting unit for setting an analysis area related to the analysis, and an analysis mode setting unit for setting and Analysis of the relevant analysis mode, that is, the analysis area and the analysis mode can also be automatically set according to the feature analysis conditions.

In one embodiment, the analysis unit performs predetermined processing such as correction and interpolation on the analyzed thermal image data frame, extracts thermal image data determined by the analysis region based on the predetermined analysis region, and performs temperature conversion processing to obtain the heat. The temperature value corresponding to the data is used, and then the obtained temperature value is analyzed and calculated according to the analysis mode. Taking the analysis area S01 shown in Fig. 5 and calculating S01MAX as an example, the thermal image data in the analysis area S01 is converted and analyzed to obtain the highest temperature value.

The above examples are not intended to be limiting as to the embodiment of the analysis process. For example, the process of converting the thermal image data in the analysis region into a temperature value may be to convert all the thermal image data in the analysis region into a temperature value; or to convert the predetermined partial thermal image data into a temperature value; It is possible to determine whether to convert the thermal image data according to different modes of calculating the highest, lowest, and average temperature in the analysis mode, and to convert a part of the thermal image data in the analysis region, or all; for example, the analysis mode is the highest in the calculation analysis region. At the temperature, the thermal image data in the analysis area can also be compared first, and the maximum AD value is converted into a temperature value, and the thermal image data pixels in the analysis area are not necessarily required. The AD values are all converted to temperature values. The thermal image data is converted into a temperature value by a predetermined process, for example, according to the set emissivity of the object, the ambient temperature, the humidity, the distance added when photographing, and the like, and the AD value of the thermal image data and the temperature. The conversion factor is obtained by specifying a conversion formula to obtain a temperature value.

The above example illustrates the case where the temperature value characteristic data is obtained according to the analysis area, but is not limited thereto, and the characteristic data for the thermal image analysis has various conditions depending on the application, and is not limited to the temperature value; for example, a specific temperature value The percentage content in the pixel array of the thermal image data frame, etc.; based on the AD value of the thermal image data frame, the gray value, the color value of the pseudo color, etc., the obtained feature data, or the AD value is converted into the radiant energy value The case where the gray value, the emissivity value, the color value, and the like are analyzed, or the value of the similarity obtained based on a specific matching feature (such as a template, etc.), the present invention is equally applicable to these cases. Further, the analysis may be obtained based on additional information in the thermal image data frame, for example, a specific temperature value is added to the thermal image data frame itself, and the additional information may be used as the characteristic data obtained by the analysis.

The control unit 8 is configured to form, as a characteristic curve generating unit, a feature curve formed by connecting feature points or feature points in the feature curve coordinate system based on the frame time information of the predetermined frame and the feature data obtained by the predetermined frame analysis.

When multiple feature analysis conditions are configured, multiple sets of feature data corresponding to multiple feature analysis conditions can be analyzed and analyzed; in the feature curve coordinate system, multiple pairs formed by the same set of feature points or the same set of feature points are formed. Characteristic curves (two characteristic curves obtained according to the feature analysis conditions S01MAX, S01AVG as shown in Fig. 6); or based on a plurality of characteristic curve coordinate systems, formed by the same set of feature points or the same set of feature points in each coordinate system One or more characteristic curves formed afterwards. Wherein, when the feature curve is formed by the feature points, the feature curves formed by the feature points obtained by the different feature analysis conditions are displayed in different manners (for example, different colors) to avoid the features obtained by different feature analysis conditions. The point is confusing.

The feature data obtained by sequentially analyzing a predetermined number (for example, frame by frame) of the specified frame and the frame timing information of the predetermined frame may be sequentially generated in the coordinate system; or all the specified frames may be analyzed to obtain the feature data, according to The frame timing information of the specified frame is used to generate a characteristic curve in the coordinate system at one time.

The ordinate of the coordinate system represents, for example, a scale of feature data, and the abscissa represents frame timing information of the analyzed thermal image data frame such as frame number, time, and the like. The display of the ordinate feature value, the abscissa value, and the threshold boundary (when the feature data exceeds the threshold line, the subject in the thermal image data frame exceeding the partial portion may be defective) may be omitted, and the ordinate may be omitted. , the generation and display of the abscissa; obviously can also be displayed, and the ordinate feature value, the abscissa value can be pre-specified or adaptive, such as an adaptive embodiment, according to the selected thermal image data The frame timing of the frame is used to determine the value of the abscissa, and the numerical value of the feature data obtained by analyzing the specified frame in the selected thermal image data frame is used to determine the numerical value of the ordinate; obviously, the configuration of the ordinate and the abscissa may have Variety of ways. The abscissa and ordinate are also interchangeable.

The control unit 8 serves as a curve display control unit for causing the display unit to display a characteristic curve or the like. The curve display control unit can control the display range of the characteristic curve (such as displaying some or all of the characteristic curves), the color of the curve, the local color of the curve, Blinking, zooming, etc. Preferably, the characteristic curve coordinate system is further displayed, and the characteristic curve coordinate system can have various display modes. For example, the characteristic curve coordinate system is not displayed in the manner shown in FIG. 4, and only the characteristic curve and the upper and lower limits of the characteristic data are displayed. . In addition, one or more threshold boundaries (such as threshold line 3044 in Figure 5) can be further displayed for the user to understand.

The control unit 8 as the feature cursor display control unit may display the feature cursor in at least one of the feature curve, the abscissa of the coordinate system, and the ordinate of the coordinate system; preferably, the feature cursor is displayed on the feature curve; The feature cursor display control unit displays the feature cursor located at the positioned position based on the positioning operation of the feature cursor. Feature The positioning operation of the cursor is performed by, for example, selecting the feature cursor by the operation unit 9, and for example, by operating the cursor, for example, inputting specific data or the like. For example, the feature cursor may also be in the form of a vertical cursor or the like. In this case, an indication of the corresponding position may be simultaneously performed on the abscissa of the characteristic curve and the coordinate system.

The control unit 8 serves as an information display control unit for causing the display unit to display information related to the thermal image data frame corresponding to the feature cursor position, for example, the feature data related to the thermal image data frame corresponding to the feature cursor position, which can be based on the feature cursor position. Corresponding frame timing information is used to obtain the feature data and display it. And/or an infrared thermal image obtained by causing the display unit to display the thermal image data frame corresponding to the feature cursor position, for example, determining the corresponding thermal image data frame according to the frame timing information corresponding to the feature cursor position to obtain the infrared image. Thermal image, and display.

Referring to Fig. 5, a display example of the display interface of the thermal image capturing apparatus 100 of the third embodiment will be described.

a file 301 menu item, configured to select a dynamic thermal image file to be analyzed from a storage medium such as the hard disk 5; a filter condition 302 menu item, configured to set a filter condition of the thermal image data frame related to the generated characteristic curve, The filtering condition may be: filtering the thermal image data frame in the selected dynamic thermal image file according to one or more ones of the sampling frame number, the sampling interval, the frame additional information or the related information, and the characteristic data as a filtering condition. Specify the frame.

The feature analysis condition 303 menu item is used to set a feature analysis condition related to the generated feature curve, and the feature analysis condition includes an analysis area (such as a point, a line, a surface, etc.) and an analysis mode corresponding to the analysis area, for example, based on the set analysis. Characteristic analysis conditions S01MAX, S01AVG of the region S01 (average temperature in S01); Obviously, one or more feature analysis conditions can be set.

The characteristic curve column 304 is used to display the coordinate system 3041 of the characteristic curve, the characteristic curve 3042, and the feature cursor 3043. The ordinate of the coordinate system 3041 represents, for example, a scale of feature data, and the abscissa represents frame timing information of the analyzed thermal image data frame such as frame number, time, and the like. The display of the ordinate feature value, the abscissa value, the threshold line, and the like is omitted, and it is apparent that the display can be performed.

The feature cursor 3043 is used for the user to adjust or set the position of the feature cursor. Correspondingly, the data bar and/or the play bar can be controlled to perform corresponding display changes, that is, the analysis column displays the thermal image data frame corresponding to the feature cursor position. The feature data, or the feature data of the thermal image data frame corresponding to the feature cursor position may also be displayed in the vicinity of the feature cursor. The playback bar displays the infrared thermal image corresponding to the position of the feature cursor.

The feature cursor is not limited to display on the characteristic curve, and the feature cursor may be displayed on at least one of the feature curve, the abscissa of the coordinate system, and the ordinate of the coordinate system.

The threshold line 3044 is used to display the temperature threshold (eg 80 °C) to alert the user.

The data column 305 is configured to display information related to the selected thermal image data frame, and/or to display information related to the thermal image data frame corresponding to the feature cursor 3043. The information related to the thermal image data frame corresponding to the feature cursor 3043 may also be displayed at other predetermined positions of the display unit, for example, above the feature cursor 3043.

a play bar 306, configured to display an infrared thermal image obtained by the selected thermal image data frame (or the filtered thermal image data frame); wherein, the play 3061 is used to determine the play; and the menu item includes a pause, not shown, To control playback.

Wherein, the frame advancement 3062 is used to determine the frame-by-frame forward playback.

Among them, frame-by-frame playback 3063 is used to determine frame-by-frame playback.

The progress bar scale 3064 is used to display the scale of the selected thermal image data frame, and further, display frame timing information, such as the number of frames, etc.

The play cursor 3065 is configured to display the progress of the currently displayed infrared thermal image in the play sequence, and further, display frame timing information of the currently displayed thermal image, such as a frame number, a time, and the like. The control flow of this embodiment will be described with reference to FIG.

Step C01, selecting a dynamic thermal image file to be processed; here, one or more dynamic thermal image files can be selected, for example, by the operation of the file 301.

Step C02: Perform filtering according to the specified filtering condition; then, filter the thermal image data frame included in the selected thermal image file according to the specified filtering condition; the user may preset the filtering condition by using the filtering condition 302.

Step C03, analyzing the filtered plurality of thermal image data frames to obtain feature data;

The user can set the feature analysis conditions (such as a specific analysis area and analysis mode) for analysis. In this example, the user presets the analysis area S01 and calculates the maximum temperature of S01 as the feature analysis condition.

Step C04, generating a characteristic curve according to the obtained feature data (S01MAX) and timing information (time, frame number, etc.) of the corresponding thermal image data frame;

Step C05, displaying the characteristic curve. The user sees a characteristic curve 3042 as shown in FIG.

Step C06, judging whether there is an indication to display the feature cursor? When the user moves the cursor to the feature curve bar through the operation part, the feature cursor corresponding to the corresponding cursor position is displayed; in addition, the feature cursor of the specific position, such as the feature cursor at the maximum position of the S01MAX value in the curve, can also be automatically displayed.

Step C07, once the display of the feature cursor is determined, the control unit 8 determines the corresponding thermal image data frame according to the frame timing position corresponding to the feature cursor 3043 and obtains the feature data and the infrared thermal image. As shown in FIG. 5, the feature cursor 3043 The corresponding data column 305 displays "S01MAX=85 °C", the infrared thermal image displayed in the play field 306.

The user can also move the position of the feature cursor 3043 through the operation unit 9, and correspondingly, the data displayed in the data column 305 and the infrared thermal image displayed in the play field 306 are based on the frame timing of the thermal image data frame indicated by the feature cursor 3043. The location is changed.

Obviously, the user can further analyze the infrared thermal image in Figure 5, for example, by setting a more detailed analysis area for analysis.

Moreover, the user can also perform frame-by-frame playback in the play bar 306 to determine whether the filtered thermal image data frame has a higher temperature thermal image data frame. For example, if the selected image is a thermal image dynamic file, multiple frames of thermal image data frames having high temperature points may be captured during dynamic shooting. After positioning to the position of the feature cursor 3043 of FIG. 5, the playback cursor 3065 also locates the corresponding frame timing. Position, at this time, before and after frame-by-frame playback, it is very easy to find (the before and after timing of the infrared thermal image shown in Fig. 5) whether the filtered thermal image data frame has a higher temperature thermal image data frame.

In a preferred manner, the feature cursor 3043 also points to the corresponding curve position as the position of the play cursor 3065 moves. It should be noted that when the displayed infrared thermal image indicated by the play cursor 3065 is not used to analyze and obtain the feature data, The corresponding position on the characteristic curve of the thermal image data frame of the closest analysis is used as the position of the feature cursor 3043 to represent the corresponding position of the currently displayed infrared thermal image on the characteristic curve.

As described above, by generating the characteristic curve, the processing quality of the dynamic thermal image file is ensured, and the processing speed is improved, and the workload of manual frame-by-frame observation analysis is saved; the feature cursor on the characteristic curve is convenient for the user to check. Look, and you can quickly find frames with further research value in massive thermal image data frames.

Moreover, setting the filtering condition is not necessary, and the step of step C02 may be omitted; in the case of quickly browsing the characteristic curve, the operation of the feature cursor is not necessary, and therefore, the above steps C06-C08 may be omitted, thereby controlling The portion 8 can omit the functions as the feature cursor display control portion and the information display control portion, and a simplified feature curve interface is as shown in FIG. Obviously, when the infrared thermal image data obtained after the predetermined processing is included in the dynamic thermal image file and the data frame of the temperature value data array; the same applies to the above analysis.

Other modifications and variations of the disclosed embodiments can be made without departing from the spirit and scope of the invention.

Other embodiments

Further, the image data obtained by performing the predetermined processing on the thermal image data frame (AD value data) or the obtained temperature value data may be subjected to compression processing, and then dynamically recorded to generate a dynamic thermal image file.

Further, the image data of the infrared thermal image obtained by the thermal image data frame (AD value data) and the temperature value data obtained by the conversion may be subjected to compression processing, and then dynamically recorded to generate a dynamic thermal image file.

In the above embodiment, it is merely an example, and the present invention is not limited thereto. The structure and operation in the above embodiments can be changed as needed. Obviously, when the thermal image capturing apparatus of the present invention is used as a part of the thermal image apparatus 13, the display control section and the like can be omitted, and the present invention is also constituted.

Dynamic recording is not limited to generating dynamic thermal image files; in one example, continuously recorded thermal image data frames can each generate a static thermal image file containing a thermal image data frame and associated additional information, and stored in a specific folder. in.

In the above examples, descriptions are made in a certain order of steps, but there may be various sequential orders according to different embodiments, and are not limited to the processing order described in the above examples. For example, when one or more of the control unit, the image processing unit, and the like are divided into a plurality of processors, there may be parallel processing to which some steps are applied.

Further, it can also be used as a constituent member or a functional module of a thermal imaging device having a photographing function, and also constitutes an embodiment of the present invention.

Although the functional blocks in the drawings may be implemented by hardware, software or a combination thereof, it is generally not necessary to provide a one-to-one correspondence to implement the structure of the functional blocks; for example, multiple software or hardware units may be implemented. A block of functionality, or a block of functionality that can also be implemented by multiple software or hardware units.

Claims

claims

1. A portable thermal imaging device, including:

The shooting part is used for continuous shooting to obtain thermal image data frames;

The display control unit is used to display the infrared thermal image obtained through prescribed processing of the thermal image data frame;

The operation part is used for dynamic recording operations;

The recording part is used to respond to the dynamic recording instructions generated based on the dynamic recording operation, and continuously record the acquired thermal imaging data frames and/or the acquired thermal imaging data frames after prescribed processing and/or the acquired thermal imaging data frames. A temperature value data array obtained after prescribed processing of the thermal image data frame. The above thermal image data frame is AD value data.

2. The thermal imaging device according to claim 1, characterized in that the recording part is used to record continuously at a prescribed frame rate.

3. The thermal imaging device according to claim 2, wherein the recording frame rate can be set in the range of 3-15 frames/second.

4. The thermal imaging device according to claim 1, characterized in that the recording unit is used to continuously record the obtained thermal imaging data frames to a non-volatile storage medium according to a prescribed recording frame rate, and generate at least one prescribed size dynamic thermal image file.

5. The thermal imaging device according to claim 1, characterized by having a pause control unit for pausing the recording process in response to a prescribed operation, and in a state where recording is paused, responding to the prescribed operation and continuing dynamic recording. deal with.

6. Analysis device, including - selection part, used to select one or more dynamic thermal image files;

The analysis part is used to analyze the specified frames in the selected dynamic thermal imaging file according to the specified feature analysis conditions, and obtain the characteristic data corresponding to the feature analysis conditions;

The characteristic curve generating unit is configured to form a characteristic curve composed of characteristic points or a characteristic curve composed of connected characteristic points in the characteristic curve coordinate system based on the frame timing information of the prescribed frame and the corresponding characteristic data.

7. The analysis device according to claim 6, characterized in that,

It has a filtering part, which is used to filter the selected thermal image data frames according to the prescribed filtering conditions, and obtain the prescribed frames related to the generated characteristic curve; the filtering part is based on the number of sampling frames, sampling intervals, frame additional information or association. One or more of information, feature data, and time are used as filter conditions to filter the selected thermal image data frames to obtain the specified frames.

8. The analysis device according to claims 6 and 7, characterized in that it has

A feature cursor display control unit configured to display a feature cursor corresponding to at least one of the feature curve, the abscissa coordinate of the coordinate system, and the ordinate coordinate of the coordinate system;

Feature cursor operation part, used for positioning operation of feature cursor;

Wherein, the feature cursor display control unit displays the feature cursor located at the position after positioning based on the positioning operation of the feature cursor;

The information display control unit is used to control the display of information related to the thermal image data frame corresponding to the feature cursor position and/or the infrared thermal image obtained based on the thermal image data frame.

9. The analysis device according to claim 6, characterized in that,

When multiple feature analysis conditions are configured, the feature curve generation unit is configured to specify multiple sets of feature data obtained by frame analysis and frame timing information of the specified frame based on each feature analysis condition, in the feature curve coordinate system. formed by a group or One or more characteristic curves composed of multiple groups of the same set of feature points or feature points connected; or, formed in multiple feature curve coordinate systems consisting of one or more groups of the same set of feature points or feature points connected. One or more characteristic curves.

10. A portable thermal imaging method, including:

Shooting steps, used for continuous shooting to obtain thermal image data frames;

The display control step is used to display the infrared thermal image obtained through prescribed processing of the thermal image data frame;

Operation steps, used for dynamic recording operations;

The recording step is used to respond to the dynamic recording instruction generated based on the dynamic recording operation, and continuously record the acquired thermal image data frame and/or the acquired thermal image data frame after prescribed processing and/or the acquired thermal image data frame. A temperature value data array obtained after prescribed processing of the thermal image data frame. The above thermal image data frame is AD value data.

11. Analysis methods, including:

Selection step, used to select one or more dynamic thermal image files;

The analysis step is used to analyze the specified frames in the selected dynamic thermal image file according to the specified feature analysis conditions, and obtain the feature data corresponding to the feature analysis conditions;

The characteristic curve generating step is used to form a characteristic curve composed of characteristic points or a characteristic curve composed of connected characteristic points in the characteristic curve coordinate system based on the frame timing information of the prescribed frame and the corresponding characteristic data.

12. The analysis method according to claim 11, characterized in that:

The feature cursor display control step is used to display the feature cursor corresponding to at least one of the feature curve, the abscissa coordinate of the coordinate system, and the ordinate coordinate of the coordinate system;

Feature cursor operation steps, used for positioning operation of feature cursor;

Wherein, the feature cursor display control step is based on the positioning operation of the feature cursor to display the feature cursor located at the position after positioning;

The information display control step is used to control the display of information related to the thermal image data frame corresponding to the feature cursor position and/or the infrared thermal image obtained based on the thermal image data frame.