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DDE (Digital Detail Enhancement) enhances image details and/or suppresses fixed pattern noise.

ACE (Active Contrast Enhancement) provides a contrast adjustment dependent on the relative

scene temperature. ACE thresholds greater than 0 impart more contrast to hotter scene content

and decrease contrast for colder scene content (e.g. sky or ocean). ACE thresholds less than 0 do

the opposite by decreasing contrast for hotter scene content and leaving more of the gray-scale

shades to represent the colder scene content.

SSO (Smart Scene Optimization) defines the percentage of the histogram that will be allotted

a linear mapping. SSO features facilitate the avoidance of irradiance level compression, which

is specifically important for bi-modal scenes, and better preserves the radiometric aspects of

an image (i.e. the difference in gray shades between two objects is more representative of the

difference in temperature). While radiometry is better preserved with this feature, the compromise

is the optimization of local contrast.

Contrast: The ratio of the black and white of the image. The colors will be richer and have more

contrast when the value is large.

Brightness: The brightness of the image.

Spot Meter

The Zenmuse XT-Radiometric can measure the temperature for any position in an image with an

accuracy of ±10˚C. When environmental conditions are ideal, the camera provides an accuracy

of ±5˚C.

The Zenmuse XT-Performance can also measure the average temperature of the 4×4 pixels in the

center of an image with an accuracy of ±20˚C in High Gain mode, and an accuracy of 20% of the

entire temperature range or 20˚C (whichever is greater) in Low Gain mode.

Area Measurement (Zenmuse XT-Radiometric Only)

Enabling this function will display the average temperature, lowest temperature, the highest

temperature and the corresponding locations of each area in the DJI GO app. Full screen view also

supported.

The spot meter's measurement accuracy is affected by various factors:

1) Reflectivity of objects - shiny metals with high reflectivity will reflect more of the background

radiation, and result in a larger error; objects with matte surfaces will produce a higher accuracy.

2) Temperature of background radiation - a sunny day without clouds will have less of an effect on

the accuracy than a cloudy day.

3) Air temperature and humidity - the higher the temperature and humidity, the lower the accuracy.

4) Distance between camera and object - the shorter the distance, the higher the accuracy.

5) Emissivity of objects - the higher the emissivity, the higher the accuracy.

Temperature Alert (Zenmuse XT-Radiometric Only)

After enabling Area Measurement, you can set an alert value for the Temperature Alert function.

When the highest temperature in the selected area exceeds the alert value, an on-screen notification

will appear in the DJI GO app, accompanied by a beeping sound.

ZENMUSE XT User Manual