DJI thermal analysis tool: a guide – heliguy ™

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  • Process and analyze radiometric images of thermal drones with the DJI thermal analysis tool;
  • This free software package can be used in a range of industry sectors and allows users to identify specific temperature information or anomalies in a dataset;
  • This information can be vital in preventing or solving major problems in critical infrastructure;
  • DJI Thermal Analysis Tool 2.0 is compatible with the DJI Mavic 2 Enterprise Advanced and the H20T camera for the M300 RTK.

The DJI Thermal Analysis Tool is a free software solution that allows operators of the DJI Mavic 2 Enterprise Advanced and DJI Zenmuse H20T sensor to process and analyze their radiometric images of thermal drones.

It is a particularly powerful tool for identifying temperature information of specific / critical areas of a dataset; ideal for detecting and locating temperature anomalies. This in turn helps prevent or resolve major incidents – spotting problems before it’s too late.

The program is beneficial for a variety of applications, such as energy equipment monitoring, infrastructure inspection, scientific research, and civil surveying.

Which drones / cameras are compatible with the DJI thermal analysis tool?

The DJI 2.0 thermal analysis tool – released in 2021 – is compatible with the DJI Mavic 2 Enterprise Advanced drone, as well as the H20T payload, designed for the DJI M300 RTK aircraft.

The V1 version – released in 2020 – is compatible with the H20T, as well as with the thermal camera XT S.

The Mavic 2 Enterprise Advanced is a lightweight, portable drone with integrated thermal and visual sensors. The thermal sensor – upgraded from previous Mavic 2 Enterprise drones – has a resolution of 640 x 512 pixels and a frame rate of 30Hz. It also has a dedicated 16x thermal zoom.

The H20T is an IP44 rated quad-sensor payload that can be integrated into the Matrice M300 RTK – DJI’s most powerful corporate drone to date. Its thermal sensor has the same resolution as the Mavic 2 Enterprise Advanced, as well as an 8x digital thermal zoom.

DJI Thermal Analysis Tool: Perform Analysis

After collecting the date of the thermal drone, it is time to do some analysis on it.

The DJI Thermal Analysis Tool provides users with several features to collect detailed thermal information.

Importing images

Click Pic Preview on the home page and select the folder containing the infrared images to analyze. The preview images appear as below.

Click on the picture. The interface on the right displays environmental and image information. Double-click on the image to access the Analysis page.

Color palettes

The DJI Thermal Analysis Tool allows users to switch between a range of color palettes to interpret their data.

Some of the key palettes are:

  • White hot: The most commonly used pseudo color, using white for high temperatures and black for low temperatures. The versatility of White Hot makes it attractive for use in changing landscapes and urban areas.
  • Warm black: The reverse of White Hot, with black for warmer objects and white for colder ones. Black Hot is popular for law enforcement because it displays body heat in a clear and realistic image.
  • Iron red: Highlights differences in thermal signatures, quickly showing anomalies. Color shows the distribution of heat: warmer objects appear as light colors and cooler objects appear as dark and cool colors. Iron Red is ideal for industrial inspection thermography.
  • Rainbow 1: Ideal for highlighting nuanced temperature differences; especially useful for small temperature changes. Rainbow 1 reduces the warm color ratio and increases the cool color ratio for high temperature targets to better show the details of cold targets.

The chroma bar on the right of the screen can be used to adjust the color scale of the pseudo-color to highlight objects within a specific temperature range, by changing the distribution of the gradation of the pseudo-color and the overall contrast.

Please note that when analyzing images taken by the Mavic 2 Enterprise Advanced, the chroma bar may be moved to adjust the mapping relationship between temperature and color.

When using an image from the Zenmuse H20T, the isotherm icon must first be selected before adjusting the chroma bar.

Surface measurements

One of the main features of the DJI thermal analysis tool is its ability to allow users to analyze and compare specific temperatures and temperature differences in an isolated part of a dataset.

There are many ways to do this:

  • Spotmeter: Click and left click on the point to be measured in the image. The temperature of this point will be displayed. Drag the point to change the position to be measured.

  • Line measurement: Click to measure the highest, lowest, and average temperatures in a straight line.
  • Rectangular measure: Click to measure the highest, lowest, and average temperatures in a rectangular area.

  • Circle measurement: Tap to measure the highest, lowest, and average temperatures in a circular area.
  • Polygon measurement: Click to measure the highest, lowest, and average temperatures of a polygon area.

Isotherms

The DJI Thermal Analysis Tool allows users to observe isothermal data.

Isotherms are bright colors that highlight certain temperature ranges in a grayscale image.

They are a useful way to identify hot equipment operating outside safe limits or cold areas that could indicate a water leak. Firefighters can use isotherms to detect fire hot spots.

In the DJI Thermal Analysis Tool, the temperature outside the temperature range will be displayed as warm white by default or as warm black by pressing and selecting warm black.

This function is only available when analyzing images taken by a Zenmuse H20T.

Thermal parameters

The environment settings of each temperature measurement object can be adjusted to improve the accuracy of the analysis. These parameter settings include:

  • Ambient temperature: The ambient temperature will affect the radiation of an object. The closer the input value is to the actual room temperature, the more accurate the measurement.
  • Reflected temperature: The surface of the target that is measured can reflect the energy radiated by surrounding objects.
  • Emissivity: The force with which the surface of the object emits energy in the form of thermal radiation.
  • Distance: The distance between the camera and the target. Being too close or too far will result in greater accuracy errors when measuring.
  • Humidity: Configure this setting according to the actual environment. The default value 70 means the relative humidity is 70% and the value range is 20 to 100%.

Please note that the ambient temperature, emissivity and distance settings can be adjusted with the Mavic 2 Enterprise Advanced. The parameters of reflected temperature, emissivity, distance and humidity can be adjusted with the H20T.

Extracting a thermal report

After the temperature analysis is complete, users can extract a thermal report.

The software will generate a PDF report and a Word report containing environmental information parameters and thermal image with temperature measurements.

By clicking on Export Photo, an image containing the current temperature measurements can be exported in BMP format.

System requirements

Both versions of the thermal analysis tool are only available for Windows; not Mac.

The DJI Thermal Analysis Tool 2 is recommended for Windows 10 or higher. This can be downloaded here.

V1 is recommended for Windows 7 or Windows 10 or higher. This can be downloaded here.

DJI Thermal Analysis Tool – Summary

The DJI 2.0 Thermal Analysis Tool is specially designed for the Mavic 2 Enterprise Advanced and H20T payload.

Thermal imaging is a powerful solution to identify fire hotspots or identify faults / issues with critical infrastructure and assets.

The DJI Thermal Analysis Tool allows users to gather in-depth information on specific areas of their thermal data sets to make informed and rapid decisions.


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