CN105021290B - Shooting device, pseudo color setting device, shooting method and pseudo color setting method - Google Patents
Shooting device, pseudo color setting device, shooting method and pseudo color setting method Download PDFInfo
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Abstract
The invention discloses a shooting device, a pseudo color setting device, a shooting method and a pseudo color setting method, and relates to the application fields of thermal image shooting devices, thermal image processing devices and infrared detection. The automatic pseudo color or the artificial pseudo color in the prior art has poor effect; the invention provides a shooting device, a pseudo color setting device, a shooting method and a pseudo color setting method, which can select information of a tested object; and processing the thermal image data based on pseudo color configuration information associated with the information of the measured object to obtain the infrared thermal image after pseudo color. The problems in the prior art are solved.
Description
Technical Field
The invention discloses a shooting device, a pseudo color setting device, a shooting method and a pseudo color setting method, and relates to the field of application of infrared detection.
Background
During shooting, corresponding pseudo-color setting needs to be carried out on thermal image data to obtain an infrared thermal image, and the state evaluation of a shot object is carried out.
In the prior art, the range of the pseudo color plate can be automatically determined or manually adjusted according to the temperature range or the AD value range of the thermal image data; for example, a temperature range or an AD value range is set to determine a corresponding pseudo-color plate range, and a specific color value corresponding to the temperature value or the AD value of each pixel in the pseudo-color plate range is used as image data of a corresponding pixel position in the infrared thermal image to obtain image data of the infrared thermal image. As shown in the schematic diagram of the pseudo-color plate 301 shown in FIG. 4, the range of the gray pseudo-color plate from black to white is obtained according to the temperature range of 10-35 ℃ corresponding to the thermal image data.
The range of the pseudo color plate is automatically determined according to the temperature range (or the range of the AD value) of the thermal image data, and when the background is complex, for example, when high-temperature objects exist in the background, the range of the pseudo color plate has a large influence on the thermal image of the object to be observed. The infrared thermal image obtained by automatically determining the range of the pseudo-color plate shown in FIG. 5 has a range of 10-55 ℃ due to the temperature source 404 of 55 ℃ in the background; at this time, the range of the pseudo color plate is widened, so that the thermal image IR1 of the measured body becomes dim, and the judgment of the hidden danger is very unfavorable.
Therefore, at this time, the range of the pseudo color plate corresponding to the thermal image needs to be adjusted by a user in a manner of manually adjusting the range of the pseudo color plate, for example, the upper and lower thresholds of the pseudo color plate are dragged; if the user with rich experience adjusts, the image can be adjusted to the best effect, but the operation is very complicated. The common user is difficult to master the degree of adjustment, resulting in difficult resolution hidden danger in infrared thermal imagery.
In order to improve the effect of the pseudo color, various improving methods can be adopted, for example, the range of the pseudo color plate is properly expanded or reduced according to the temperature range of the thermal image data, for example, the range of the gray pseudo color plate from black to white is obtained by expanding the temperature range of 10-35 ℃ corresponding to the thermal image data to 5-40 ℃; for example, different pseudo color plate types (such as gray scale, iron red, feather red, etc.); but when the background is complex, the overall effect is not ideal.
It is therefore appreciated that there is a need for a camera that does not require the cumbersome operation of the user and that is easy to set up to obtain an infrared thermal image that is easy to resolve.
Disclosure of Invention
The invention provides a shooting device, a pseudo color setting device, a shooting method and a pseudo color setting method, which can select information of a tested object; and processing the thermal image data based on pseudo color configuration information associated with the information of the measured object to obtain the infrared thermal image after pseudo color.
Therefore, the invention adopts the following technical scheme that the shooting device comprises:
the thermal image acquisition part is used for shooting and acquiring thermal image data;
a selection unit for selecting information of a subject;
and the image processing part is used for processing the thermal image data based on the pseudo-color configuration information associated with the information of the detected body to obtain the infrared thermal image after pseudo-color.
The invention also provides a shooting method, which comprises the following steps:
a thermal image acquisition step for shooting and acquiring thermal image data;
a selection step for selecting information of a subject;
and an image processing step, namely processing the thermal image data based on the pseudo color configuration information associated with the information of the measured object to obtain the infrared thermal image after pseudo color.
The invention also provides a pseudo color setting method, which comprises the following steps:
a thermal image acquisition step for acquiring thermal image data;
a selection step for selecting information of a subject;
and an image processing step, namely processing the thermal image data based on the pseudo color configuration information associated with the information of the measured object to obtain the infrared thermal image after pseudo color.
Other aspects and advantages of the invention will become apparent from the following description.
Description of the drawings:
fig. 1 is a block diagram of an electrical structure of the thermal image capturing apparatus of embodiment 1.
Fig. 2 is an external view of the thermal image capturing apparatus according to embodiment 1.
FIG. 3 is an example of subject information and associated pseudo-color configuration information stored by a storage medium;
fig. 4 is a display example of a pseudo color sheet.
FIG. 5 is a display example of an infrared thermal image obtained by automatically setting the range of a pseudo-color plate according to the prior art.
FIG. 6 is a display example of an infrared thermal image obtained by pseudo-color processing of pseudo-color configuration information associated with selected subject information in embodiment 1.
Fig. 7 is a control flowchart of the thermal image capturing apparatus of embodiment 1.
Detailed Description
The following examples are to be construed as being illustrative and not limitative of the scope of the present invention and are intended to be modified in various forms within the scope thereof.
Example 1
Embodiment 1 takes a portable thermal image photographing device 100 with a photographing function as an example of the photographing device. The structure of the thermal image capturing apparatus 100 of embodiment 1 is explained with reference to fig. 1.
The thermal image shooting device 100 is provided with a shooting part 1, an image processing part 2, a display control part 3, a display part 4, a communication I/F5, a temporary storage part 6, a memory card I/F7, a memory card 8, a flash memory 9, an operation part 10 and a control part 11, wherein the control part 11 is connected with the corresponding parts through a control and data bus 12 and is responsible for the overall control of the thermal image shooting device 100.
The imaging unit 1 is configured by an optical component, a lens driving component, an infrared detector, a signal preprocessing circuit, and the like, which are not shown. The optical component is composed of an infrared optical lens for focusing the received infrared radiation to the infrared detector. The lens driving part drives the lens to perform focusing or zooming according to a control signal of the control part 11, or may be an optical part that is manually adjusted. An infrared detector, such as a refrigeration or non-refrigeration type infrared focal plane detector, converts infrared radiation passing through the optical components into electrical signals. The signal preprocessing circuit includes a sampling circuit, an AD conversion circuit, a timing trigger circuit, and the like, performs signal processing such as sampling on an electrical signal output from the infrared detector in a prescribed period, and converts the electrical signal into digital thermal image data, for example, binary data (also called thermal image AD value data) of 14 bits or 16 bits by the AD conversion circuit. In embodiment 1, the photographing part 1 functions as a thermal image acquiring part for acquiring thermal image data.
In this embodiment, the thermal image data is obtained by shooting, but is not limited thereto, and according to different implementation manners of the thermal image obtaining part, the thermal image data may also be obtained by receiving external thermal image data, or may also be obtained by reading a thermal image file from a storage medium, or the like; the thermographic data may comprise a variety of data obtained based on the infrared detector output signals, for example may comprise thermographic AD value data, may comprise image data of infrared thermography, may comprise data related to temperature value array data, etc.
The image processing unit 2 performs predetermined processing on the thermal image data obtained by the image pickup unit 1, and the image processing unit 2 performs processing for converting the thermal image data into data suitable for display, recording, and the like, such as correction, interpolation, pseudo color, synthesis, compression, decompression, and the like. For example, the image processing unit 2 performs predetermined processing such as pseudo-color processing on thermal image data obtained by imaging by the imaging unit 1 to obtain image data of an infrared thermal image. In one embodiment, for example, when the processed thermal image data is thermal image AD value data, the CPU2 performs corresponding predetermined processing such as pseudo color processing, for example, determining a corresponding pseudo color range according to an AD value range of the thermal image data or a set range of the AD value, and using a specific color value corresponding to each AD value in the pseudo color range as image data of a corresponding pixel position in the infrared thermal image to obtain image data of the infrared thermal image, and further performing predetermined processing such as correction, interpolation, and the like on the decompressed thermal image data. The image processing unit 2 can be implemented by, for example, a DSP, another microprocessor, a programmable FPGA, or the like.
The display control unit 3 performs generation and output of a video signal from the image data for display stored in the temporary storage unit 6 under the control of the control unit 11, and the video signal is displayed on the display unit 4.
The communication I/F5 is an interface for connecting and exchanging data between the thermal image capturing apparatus 100 and an external apparatus such as a personal computer, a server, a PDA (personal digital assistant), another thermal image apparatus, or a visible light capturing apparatus, according to communication specifications such as USB, 1394, internet, 3G, 4G, and 5G, for example.
The temporary storage unit 6 is a volatile memory such as RAM, DRAM, or the like, and serves as a buffer memory for temporarily storing thermal image data output from the image pickup unit 1, and also serves as a work memory for the image processing unit 2 and the control unit 11, and temporarily stores data processed by the image processing unit 2 and the control unit 11.
The memory card I/F7 is connected to the memory card I/F7 as an interface of the memory card 8, as a rewritable nonvolatile memory, and is detachably mounted in a card slot of the thermal image capturing apparatus 100 main body, and records data such as thermal image data under the control of the control unit 11.
The flash memory 9 stores a program for control and various data used for control of each part. The subject information and its associated pseudo-color configuration information are stored in a storage medium such as flash memory 9.
In embodiment 1, as in the table shown in fig. 3, a flash memory 9 is used as an example of a storage medium for storing measured object information and pseudo color arrangement information associated therewith.
The storage medium may be a storage medium in the thermal image capturing apparatus 100, such as a nonvolatile storage medium like a flash memory 9 and a memory card 8, and a volatile storage medium like a temporary storage 6; other storage media connected with the thermal image capturing device 100 in a wired or wireless manner may also be used, such as storage media in other storage devices, thermal image capturing devices, computers, etc., or storage media of network destinations connected with the communication I/F5 in a wired or wireless manner.
The measured body information, which is information related to the measured body, for example, contains information representing the type or model of the measured body; for example, information representing the location, type, number, etc. of the object under test; preferably, the subject information includes information representing the identity of the subject. The information on the subject may include, for example, information on one or more of the subject's attribution unit, classification level (e.g., voltage level, importance level, etc.), model, manufacturer, performance, and characteristics, past imaging or inspection history, date of manufacture, lifetime, parts, ID number, and the like.
Pseudo-color configuration information, which may include parameters, and/or algorithms, related to pseudo-color processing; in one example, information about the range of the pseudo color plate, the type of the pseudo color plate, the corresponding relation (which may include an algorithm) of converting thermal image data into pseudo color, and the like can be included; in another example, information about correspondence (which may include an algorithm) such as a range of a pseudo color plate, conversion of thermal image data to pseudo color, may be included. In the field of infrared detection, such as the field of electric power, since the surface temperature of various objects to be measured is usually within a certain temperature range during operation, pseudo color configuration information can be configured in advance according to the corresponding object to be measured.
Preferably, different tested bodies have respective corresponding surface temperature ranges under different operating conditions, such as environmental conditions; therefore, it is preferable that the correspondence table of the pseudo color configuration information and the operating conditions such as environmental parameters (e.g., one or more of ambient temperature, humidity, wind speed, distance, etc.) and/or operating loads (e.g., one or more of current, voltage, rotational speed, power, etc.) may be stored in association with the subject information in advance. For example, a correspondence table of the operating environment temperature and the pseudo color configuration information may be stored in association with the subject information. And then corresponding pseudo-color configuration information can be obtained according to the selected information of the measured object and the operating environment temperature.
In a preferred example, the thermal image capturing apparatus 100 has a configuration recording unit for recording the information of the object to be measured and the pseudo color configuration information in association with each other; or the information of the tested object, the pseudo color configuration information and the running condition are recorded in a correlation mode. For example, the association is recorded in a table of a storage medium such as the flash memory 9.
The operation section 10: the control unit 11 executes a program corresponding to an operation signal from the operation unit 10 for a user to perform various operations. Referring to fig. 2, the operation unit 10 includes a button operated by a user, or may be implemented by using the touch panel 3, a voice recognition unit (not shown), or the like.
The control unit 11 controls the overall operation of the thermal image capturing apparatus 100, and a program for control and various data used for control of each unit are stored in a storage medium such as the flash memory 9. The control unit 11 is realized by, for example, a CPU, an MPU, an SOC, a programmable FPGA, or the like; the image processing unit 2 and the display control unit 3 may be a processor integrated with the control unit 11.
The specific operation and control flow of embodiment 1 will be described in detail below. The application scene is used for shooting a measured object of a transformer substation. After the power is switched on, the control part 11 initializes the internal circuit, and then enters a shooting mode, that is, the shooting part 1 shoots to obtain thermal image data, the image processing part 2 carries out specified processing on the thermal image data shot by the shooting part 1 and stores the thermal image data in the temporary storage part 6, and the control part 11 executes control on the display control part 3, so that the infrared thermal image is continuously displayed on the display part 4 in a dynamic image form.
The control procedure of embodiment 1 is explained with reference to the flowchart of fig. 6.
A01, shooting to obtain a frame of thermal image data;
step a02, determine whether the subject information is selected? If not, the step A04 is carried out, the range of the pseudo color plate is determined according to the temperature range of the thermal image data, and the image after pseudo color is shown in FIG. 5; if yes, entering the next step;
the control unit 11 performs control to continuously monitor whether or not the user selects the operation of the subject information. When the user performs the relevant operation, the control section 11 displays a predetermined number of candidate items of the subject information generated based on the subject information on the display section 4 based on the subject information stored in the flash memory 9, and when the user selects the candidate item through the operation section 11 based on the knowledge of the subject 1, for example, a field device indication board, the process proceeds to step a 03;
the subject information "subject 1" is selected according to the user's operation. The information of the measured object may be a combination of one or more of information representing the identity of the measured object, such as the type, name, number, location, etc. of the measured object, and thus, when the candidate of the information of the measured object is a combination of a plurality of candidates, the operation of selecting and determining the candidate of the information of the measured object may require selecting the plurality of candidates to determine the final information of the measured object.
In other examples, the information of the object to be measured corresponding to the signal may also be determined by triggering a corresponding receiving device (not shown) on the thermographic photographing device according to a predetermined triggering condition, such as an external triggering signal, e.g., an induction signal, a GPS signal, etc.; various embodiments of selecting subject information may be employed.
Step A03, performing pseudo color processing on the thermal image data according to pseudo color configuration information associated with the selected measured object information 'measured object 1';
infrared thermography as shown in FIG. 6; performing pseudo-color processing on thermal image data according to a pseudo-color plate configured according to pseudo-color configuration information (the range of the pseudo-color plate at 10-35 ℃) associated with the information of the measured object, namely the measured object 1, to obtain an infrared thermal image; thermal infrared images such as that shown in FIG. 5 are clear because the configuration of the pseudo-color plate range avoids interference from hot spots 404.
Preferably, the pseudo color configuration information corresponding to the environmental parameter is obtained according to the environmental parameter, such as the environmental temperature obtained by a sensor in or connected to the thermal image capturing device 100, and according to the corresponding relationship between the environmental parameter and the pseudo color configuration information. In other examples, the environmental parameter may be entered into the thermal image capturing apparatus 100 by a user before capturing.
For example, the correspondence between the environment temperature associated with the measured body information and the pseudo color configuration information "the pseudo color board range at 5 to 25 ℃ corresponding to the environment temperature of 10 ℃", "the pseudo color board range at 7 to 30 ℃ corresponding to the environment temperature of 12 ℃", "the pseudo color board range at 10 to 35 ℃ corresponding to the environment temperature of 15 ℃" and the like, and when the environment temperature is 15 ℃, the pseudo color board range at 10 to 35 ℃ is adopted.
The obtained infrared thermal image can be displayed on the display part 4; and when the user is not satisfied with the pseudo color of the infrared thermal image, the adjustment can be carried out, and the information of the measured object, the pseudo color configuration information obtained after the adjustment and the environmental parameters are subjected to associated recording, so that the subsequent use is facilitated.
Step A05, judging whether quitting, if not, returning to step A01, and judging whether the information of the tested object is newly selected in step A02; if not, in step A04, processing the obtained thermal image data based on the previously selected pseudo color configuration information associated with the measured body information to obtain an infrared thermal image; if so, processing the obtained thermal image data according to the newly selected pseudo color configuration information associated with the measured body information to obtain the infrared thermal image.
As described above, the pseudo color plates are arranged according to the set designated area; the user can select the information of the tested object and configure the information according to the pseudo-color associated with the information of the tested object, thereby realizing rapid pseudo-color adjustment; the problems of the prior art are solved.
In the embodiment, the thermal image data is obtained by shooting, but is not limited to this, and according to different implementation manners of the thermal image obtaining part, the thermal image data may also be obtained by receiving external thermal image data, or may also be obtained by reading a thermal image file from a storage medium, or the like; the thermographic data may include a variety of data obtained based on the infrared detector output signals, such as one or more of thermographic AD value data, image data which may be infrared thermographic, data which may relate to temperature value array data, and the like.
Preferably, the device further comprises a recording part for recording the configured pseudo color configuration information in association with the thermal image data. Facilitating subsequent viewing and analysis.
Other modifications and variations to the disclosed embodiments are possible without departing from the spirit of the invention, and such modifications as are included within the scope of the claims are to be considered part of the invention.
In the embodiment, the subject thermal image in the power industry is taken as an example of the application, and the method is also applicable to various industries of infrared detection.
In addition, the processing and control functions of some or all of the components in embodiments of the present invention may also be implemented using dedicated circuits or general purpose processors or programmable FPGAs.
The foregoing describes only embodiments of the invention and is presented by way of illustration rather than limitation, and further modifications and variations of the embodiments may be made by persons skilled in the art in light of the foregoing description without departing from the spirit or scope of the invention.
Although the present invention is in embodiment 1, the example thermal image photographing apparatus 100 is a thermal image photographing apparatus having a photographing function; but also can be applied to a thermal image processing device (pseudo color setting device) for receiving thermal image data and a thermal image processing device (pseudo color setting device) for analyzing thermal image data files; thermal image processing devices such as personal computers, personal digital processing devices, and the like. The pseudo-color can be quickly adjusted, so that the thermal image processing quality is ensured, and the processing speed is improved.
In the above examples, a certain step order is described, but various sequences are possible according to different embodiments, and the processing order described in the above examples is not limited. When the control unit 11, the image processing unit 2, and the like include a plurality of processors, there may be parallel processing in which some steps are applied.
Furthermore, the present invention is not limited to photographing or acquiring thermal image data from the outside, and the functional unit implemented in the embodiment may be one component or functional module of the photographing device or the pseudo color setting device.
Other modifications and variations to the disclosed embodiments are possible without departing from the spirit of the invention, and such modifications as are included within the scope of the claims are to be considered part of the invention.
In addition, the processing and control functions of some or all of the components in embodiments of the present invention may also be implemented using dedicated circuits or general purpose processors or programmable FPGAs.
The foregoing describes only embodiments of the invention and is presented by way of illustration rather than limitation, and further modifications and variations of the embodiments may be made by persons skilled in the art in light of the foregoing description without departing from the spirit or scope of the invention.
Claims (6)
1. A camera device, comprising:
the thermal image acquisition part is used for shooting and acquiring thermal image data;
a selection unit for selecting information of a subject;
a pseudo color arrangement determining section for determining pseudo color arrangement information based on the pseudo color arrangement information associated with the selected measured object information according to the obtained running condition;
the image processing part is used for processing the thermal image data based on the pseudo-color configuration information determined by the pseudo-color configuration determining part to obtain an infrared thermal image after pseudo-color;
the pseudo color configuration information at least comprises information related to the corresponding relation of the pseudo color plate range and/or the thermal image data converted into pseudo colors or at least comprises information related to the corresponding relation of the pseudo color plate range and/or the thermal image data converted into pseudo colors corresponding to the environmental parameters;
the operating conditions may include environmental parameters and/or operating load parameters;
and the corresponding table of the environment parameters and/or the operation load parameters and the pseudo-color configuration information is stored in association with the measured object information, and the corresponding pseudo-color configuration information is obtained according to the selected measured object information and the operation environment temperature.
2. The camera of claim 1, having
And the recording part is used for recording the pseudo color parameters and the thermal image data in a correlation manner.
3. The imaging apparatus according to claim 1, wherein the imaging apparatus has a configuration recording section for recording the subject information and the pseudo color configuration information in association with each other; or the information of the tested object, the pseudo color configuration information and the running condition are recorded in a correlation mode.
4. The imaging apparatus according to claim 1, characterized by having a subject information display control section for displaying a subject information candidate obtained based on the subject information stored in the storage medium; the operation part is used for selecting the information of the tested body to be selected; and a selection unit for selecting the subject information based on the selected subject instruction information.
5. The pseudo color setting method is characterized by comprising the following steps:
s51: a thermal image acquisition step for acquiring thermal image data;
s52: a selection step for selecting information of a subject;
s53, a pseudo color configuration determining step, which is used for determining the pseudo color configuration information based on the pseudo color configuration information associated with the selected measured object information according to the obtained running condition;
s54, an image processing step, which is used for processing the thermal image data based on the pseudo color configuration information determined by the pseudo color configuration determining part to obtain the infrared thermal image after pseudo color;
the pseudo color configuration information at least comprises information related to a corresponding relation of a pseudo color plate range and/or thermal image data converted into pseudo colors or at least comprises information related to a corresponding relation of a pseudo color plate range corresponding to environmental parameters and/or thermal image data converted into pseudo colors;
the operating conditions may include environmental parameters and/or operating load parameters;
and the corresponding table of the environment parameters and/or the operation load parameters and the pseudo-color configuration information is stored in association with the measured object information, and the corresponding pseudo-color configuration information is obtained according to the selected measured object information and the operation environment temperature.
6. The pseudo-color setting method according to claim 5, wherein the thermal image obtaining step is used for shooting and obtaining thermal image data.
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