DJI Thermal Analysis Tool 3
User Guide
Version 1.0 | 2022.06
Introduction
The DJI Thermal Analysis Tool 3 is designed to analyze and process thermal images. By identifying temperature information of critical areas, the software aids in analyzing objects across various industrial applications. It helps prevent or quickly address major incidents by detecting and pinpointing temperature abnormalities in equipment during routine inspections.
Operating System Requirements
Recommended: Windows 7, Windows 8, Windows 10 or above
Supported Devices
- M30T
- Zenmuse H20N
- Zenmuse H20T
- Zenmuse XT S
- Mavic 2 Enterprise Advanced
Usage: Home Screen
The Home Screen provides access to the software's core functions.
The Home Screen is organized into numbered sections for user guidance:
- Add Folder
- My Folders
- Date
- Image Display Area
- Image Information Display Area
- Library
- Report
- Settings
- About
A visual representation of the Home Screen shows a left-hand navigation pane with folders and options, and a main area displaying thermal images and their details. The selected image's parameters and information are shown on the right.
1. Add Folder
Click 'Add Folder' to import thermal images from your local directory into the software. Note: Only R-JPEG thermal images from supported devices can be analyzed.
⚠️ Only the R-JPEG thermal images taken by the supported devices mentioned above can be analyzed by this software.
2. My Folders
Displays added folders in a tree-structured format. Left-clicking a folder shows its JPG images in the Image Display Area. Right-clicking a folder allows for deletion, refresh, or opening the folder.
ℹ️ Selecting 'Delete' here removes the folder from the software's view, not from your local storage.
3. Date
Filter imported images by date (year-month-day) for easy organization and retrieval.
4. Image Display Area
Displays imported thermal images. Left-click an image to view its information in the Image Information Display Area. Double-click to open and analyze it in the Thermal Analysis Screen. Images can be organized by date or name, and searched by name.
5. Image Information Display Area
Shows detailed information for the selected thermal image, including a preview, file name, shooting time, temperature range, parameters, image information, and remarks. Use the mouse wheel to scroll. Information is for viewing only on the home screen and cannot be edited.
6. Library
Click to return to the home screen.
7. Report
Export measurement data and other thermal image information into PDF or DOC format, or export the processed image only.
8. Settings
Language: Supported languages include Simplified Chinese and English.
Unit: Supported temperature units are Celsius (°C), Fahrenheit (°F), and Kelvin (K).
Report: Customize the logo and header for reports.
9. About
Displays the current software version and provides access to the user guide.
Thermal Analysis Screen
Double-click a thermal image in the Image Display Area to open and analyze it in the Thermal Analysis Screen. This screen includes the Toolbar, Image Display Area, Topbar, Chroma Bar, Information Display Area, and Action Bar.
The screen displays the thermal image, along with various control and information panels for detailed analysis.
Toolbar
The toolbar on the left provides tools for image analysis:
- Select:
- Enabled by default for selecting elements within the analysis screen.
- Spot Temperature:
- Measure temperature at a specific point. Click the icon, then left-click on the image. Drag to reposition the point. Right-click to delete the point or adjust annotation settings.
- Rectangle Temperature:
- Measure temperature within a rectangular area. Click the icon, then left-click and drag to define the rectangle. Displays the highest, lowest, and average temperatures within the area. Left-click the rectangle to resize or move it; right-click for options like deletion or annotation settings.
- Circle Temperature:
- Measure temperature within a circular area. Click the icon, then left-click and drag to define the circle. Displays the highest, lowest, and average temperatures within the circle. Left-click the circle to resize or move it; right-click for options.
- Line Temperature:
- Measure temperature along a line. Click the icon, then left-click and drag to draw the line. Displays the highest, lowest, and average temperatures along the line. Left-click the line to adjust its length or location; right-click for options.
- Palette:
- Select different pseudo-color palettes to visualize temperature differences in the thermal image.
- Resize:
- Adjust the image display to its original size or to fit the window.
Palette Color Description
The supported devices offer a variety of palette options. Distinct colors are used to show temperature differences in the thermal image, which are related to grayscale intensity. The temperature range of the image is mapped to 256 colors and displayed in an 8-bit JPEG image.
| Palette | Description |
|---|---|
| White Hot | The most commonly used pseudo color, using white for high temperatures and black for low temperatures, which is a natural association for people. |
| Fulgurite | Dark red represents low temperatures and white represents high temperatures. The warm tone of this palette aligns with people's association with hot temperatures. |
| Iron Red | This palette displays nuanced differences in heat signatures, quickly displaying anomalies and human bodies. Hotter objects appear as light warm colors and colder objects appear as dark cool colors. |
| Hot Iron | Red represents high temperatures, and cool colors represent low temperatures. It is able to identify hot targets quickly, while showing the details of cool targets. |
| Medical | This palette shows nuanced differences in temperatures, and is therefore ideal for scenarios with small temperature changes. In environments with low contrast, it is still able to detect objects and slight temperature changes. It is mainly used in the medical field for human body temperatures. |
| Arctic | Uses the same palette as Medical, except switching the purple for a cool blue to better reflect temperature changes. |
| Rainbow 1 | Similar to Medical, it reduces the warm color ratio and increases the cold color ratio for high temperature targets to better show the details of cool targets. |
| Rainbow 2 | The color transition is reduced, the warm and cold colors are moderately proportioned, which can show the details of high and low temperature targets at the same time. |
| Tint | Uses black and white for low temperatures and bright red for high temperatures; it is able to detect high temperature targets quickly. Mainly used for high-contrast environments, ideal for quickly and accurately identifying high temperature targets at night. |
| Black Hot | The opposite to White Hot, using black for warmer objects and white for cooler objects. The heat distribution of high temperature targets can be better observed when outdoors. |
Different palettes applied to the same example image are shown below:
Four thermal images of the same industrial scene displayed with different color palettes: White Hot (grayscale-like, bright for hot), Black Hot (opposite of White Hot, dark for hot), Iron Red (reds and yellows for hot areas), and Rainbow 1 (blues, greens, yellows, reds for varying temperatures).
Image Display Area (Analysis Screen)
Displays the currently analyzed image and its temperature measurements.
Topbar (Topbar)
Displays the file name and the shooting time for the thermal image.
Chroma Bar
Displays the adaptive temperature range of the thermal image with the selected parameters settings. Drag the two ends of the chroma bar to adjust the color scale of the pseudo color to highlight objects in a specific temperature range.
Information Bar
The information bar contains the preview image, temperature measurements, parameters settings, image information, annotations, and remarks.
- Preview: Preview the image.
Measurements
Displays all the measurements made on the current image.
Parameters
Configure settings that affect temperature measurement accuracy:
- Distance:
- The distance to the target. An infrared thermal imager generates thermal images by receiving infrared radiation from objects. The farther away the object, the more the radiation attenuates. The camera's default calibration distance is generally fixed during production. This is the distance at which temperature measurements are the most accurate. Being too close or too far will result in bigger measurement errors.
- Relative Humidity:
- The relative humidity of the environment. Please configure this parameter based on the actual environmental conditions. The default value 70 means that the relative humidity is 70%, and the value range is [20~100]. Humidity configurations could affect the measurement result, but the effect is limited.
- Emissivity:
- How strongly the target surface is emitting energy as thermal radiation. Refer to the Emissivity of Common Materials Table to configure, since the target surface may be corroded or oxidized, the actual emissivity value may differ from the reference value. Emissivity configurations could significantly impact the measurement result.
- Reflected Temperature:
- The surface of the target that is measured could reflect the energy radiated by the surrounding objects. This reflected energy could be picked up by the camera along with the radiation, which could cause an error in the temperature reading. If there are no objects with extreme high or low temperatures nearby, set this parameter as the ambient temperature. Reflected temperature configurations could affect the measurement result, and the bigger the difference between the reading and the ambient temperature, the bigger the impact.
Press the Enter key or click anywhere outside the input field to finish setting the parameters. If the input value is beyond the range, the software will input the threshold value instead.
Annotations
Input annotations in key-value pairs.
Remarks
Input remarks for the image.
Action Bar
The action bar contains the image switch arrows, and the Cancel, Export, and Save buttons.
- Image Switch:
- Displays the total number of the R-JPEG images in the selected folder and which one is being shown. Click the arrows to switch images. ➡️
- Cancel:
- Cancel all the operations for the selected image.
- Export:
- Click Export to go to the Report screen. Click Export PDF or Export DOC to export a PDF or DOC report for the selected thermal image, which contains the measurements, parameters settings, image information, annotations, and remarks. Users can also customize the logo and header for the report. Click Export Image to export a JPG image which contains measurements.
- Save:
- Save data such as spots and areas of temperature measurement, or specific palette settings to the R-JPEG images. This information is only visible when using the DJI Thermal Analysis Tool 3. This data cannot be seen when viewing these images in another software. ⚠️ Saving an image will overwrite the original image, please make a backup if needed.
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