Workswell WIRIS Agro - Crop Water Stress Camera


Workswell’s WIRIS Agro R is the first device of its kind. Designed to map water stress across large areas, it has a critical role to play in the field of precision agriculture. The device facilitates the determination of the water stress value in a given stand of plants. This information may then be used to determine yield maps, optimize irrigation, and control water management remedies. In addition, the camera offers an LWIR band sensor with radiometric measurement and 10x optical zoom RGB camera with full HD (1920 x 1080 px) resolution for biomass cover index evaluation.

Workswell Agro - CWSI Camera

Main WIRIS Agro R Applications

Although there are many uses, we can divide the main WIRIS Agro R functions into these four categories:

✅ Water status monitoring – Water stress is the plant’s response to deficiencies in the water supply during the growing season, regardless of whether the crops are irrigated or not. To enhance monitoring, the AGRO creates special color maps, “Crop” and “CropStep.”

✅ Irrigation management – This facilitates irrigation system optimization in terms of determining optimal locations for soil sensors, and in terms of structural optimization. The special color maps, “Water” and “WaterStep,” are available for this use.

✅ Phenotyping – Plant varieties respond differently to the amount of water available to them. The WIRIS Agro R will help you determine how often the plants of a given species are in water stress, compared to plants of other species.

✅ Biomass Cover Index – For real-time calculation of the field’s plant cover.

Workswell 3D Mapping

Crop Drought – Actual and Real Value

In 1981, the crop water stress index (CWSI) was developed as a normalized index to quantify water stress without interference from other environmental parameters affecting plant stress, such as temperature. In the dry season, precision farmers want to know the actual effect of drought on their crops. However, this can be difficult to measure. For example, crops may respond differently to drought if they have access to groundwater, and each plant has a different root system. These factors make it hard to tell how much a particular crop might be suffering during a given drought. That’s where the WIRIS Agro comes in. This thermal camera makes real-time measurements of the actual effects of drought on a crop.

Workswell WIRIS AgroWorkswell WIRIS Agro
See more details in full resolution

Comparison of CWSI and NDVI


Crop Water Stress Index

Workswell CWSI


Normalized Differential Vegetation Index

Workswell NDVI

Download a PDF document with a full comparison of many other features of CWSI and NDVI.

Real-time Evaluation


With the WIRIS Agro R, you get actual values of crop water stress during the flight, and you can use the collected data to create an overview map for later review. By comparing yields from different months and years depending on water stress, a potential yield map can be created according to the current water stress value. This map provides:

  • real-time onboard CWSI evaluation
  • real-time CROP and WATER color map vizualization
  • real-time additional information on how the crop is impacted by drought
  • real-time Biomass cover index evaluation in %
  • real-time Picture-in-Picture CWSI index and RGB

High Measurement Accuracy and Precision Metrology

We know that when it comes to metrology, agricultural applications can be very demanding. That’s why we ensure the accuracy of our devices through the separate calibration of each lens, and issue a final calibration certificate with each camera we deliver. Each thermal camera is individually manufactured and precisely calibrated.



CorePlayer Desktop Analysis Software for the Evaluation of CWSI Data

The CorePlayer CWSI Analysis Software is a desktop software used for processing, analyzing, and exporting CWSI RAW data images and videos. It allows the user to set a variety of parameters and models that are necessary for the correct calculation of the CWSI Index, and it facilitates later processing if the input data sent to the camera needs to be adjusted.

For data processing into 2D or 3D visualizations, we recommend the most commonly used SW tools such as Pix4D and Agisoft. Each image or video frame shot with the Agro R includes GPS information for processing.

The software is supplied free of charge with the WIRIS Agro R.

Color Map Overview


The WIRIS Agro R offers four different color maps. In terms of data processing, it is not important which map you choose, but from the application perspective, a suitable palette choice can be very helpful.

Each color map in the WIRIS Agro R camera is defined as follows: the palette is black and white as you move away from the 0 value (negative values below the range), and away from the 100% value (values above the range).

Biomass Cover Index


The BCI (Biomass Cover Index) concerns the evaluation of the vegetation mass within the RGB scene. Surfaces containing green vegetation are evaluated using data from an RGB camera, and the percentage of these areas is compared to other (non-vegetated) areas that are masked by a white color in the RGB image. The BCI is adjustable via simple thresholding by the user.

Workswell biomass calculation
Workswell biomass calculation

Many Interfaces

The Workswell WIRIS Agro R offers an interface enabling the widest range of connections to the drone, the control unit, an external GPS sensor, and other instruments. A Wi-Fi low latency live video streaming and command link is also available. The following HW interfaces are standard:


128 GB SSD disk, external USB disk or microSD card

Workswell WIRIS Agro R is equipped with an internal SSD with 128 GB memory for recording. You can also save data to an external USB disk or microSD card.

Workswell WIRIS Agro CWSI Camera
Workswell WIRIS Agro CWSI Camera

Weight and Dimensions

Workswell’s WIRIS Agro R weighs less than 430 g, which is very convenient for drone usage.

WEIGHT: < 430 g (0.95 lb)
DIMENSIONS : 83 x 85 x 68 mm (3.26 in x 3.34 in x 2.67 in)  

Workswell WIRIS Agro Cooperation


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Other information

WIRIS Agro key features description
CWSI onboard processingEvaluation of Crop Water Stress Index (CWSI) onboard in real-time
Operating onboard systemCWSI OS for full real-time data streaming and evalution during the flight
– operating system ensures the full access to all camera functions
– easy camera control via S.Bus, CAN bus, MavLink, RJ-45 or Trigger
Biomass cover index in %Real-time percentage calculation of the mass of the vegetation in RGB
WIRIS Agro specification
Sensor resolution640 x 512 pixels
Real-time CWSI evaluationWorkswell patented WIRIS Agro technology based on crop water stress index (normalized to value from 0 to 1) brings information about the crop stress and crop water management on large areas. The information can then be used to determine yield maps, manage irrigation or implement water management related remedies.
FPA active sensor size1.088 x 0.8705 cm
Type of sensorLWIR band sensor
CWSI evaluation range0 – 100% (100% means very stressed)
Temperature sensitivity0.03 °C (30 mK)
Field of view of the lens45°
Color maps4 color maps for CWSI and Water management evaluation
CWSI range settingsAutomatic or manual
CWSI digital zoom1 – 14x continuous
Software CorePlayerYes, included in the package 2 licenses
3D mapping SW compatibilityAgrisoft and Pix4D
10x Optical zoom digital visual camera
Resolution1 920 x 1 080 pixels (Full HD),
1/3” sensor,
Auto white balance,
Wide dynamic range,
Backlight compensation,
Exposure and Gamma control
Optical zoom10x optical zoom with vibration compensation
View angleUltra zoom 6.9° – extra wide 58.2°, focal 33.0 mm – 3.3 mm
Biomass cover indexCalculation of the index in real-time with Threshold function
FocusAutofocus with Direct Focus Zoom synchronization
Memory and data recording
MemoryInternal high-speed SSD 128 GB for image and video recording
External slot for Micro SD card & USB 2.0 for USB stick for taking images
Image and video formatsCWSI JPEG images and Digital camera Full HD JPEG images
Digital camera h.264 encode video HD recording
Full-frame CWSI video recording (raw data recording)
GPS geo-tagging (image & video)
GPS tagging (image & video)MavLink or External GPS or DJI A3 controllers compatible via CAN bus
Interfaces & real-time remote control
10-pin digital portS.Bus
CAN bus (compatible with DJI M600 and A3 controllers)
External GPS connectivity
External trigger
Ethernet (RJ-45) portVideo streaming and camera control (optional on request only)
Micro USB 2.0 portMass storage
Camera control and video streaming (optional on request only)
USB 2.0 portKeyboard connection for in-house WIRIS camera control
Remote control systemCWSI OS ensures real-time control of all camera functions during the flight
Remote control optionsS.BUS protocol
CAN bus for real-time control on DJI M600 and GPS geo-tagging
RJ-45 for wireless uplink installation (video streaming and camera control)
Protective filter on lensFilter protects the lens against external damage during the flight
Camera functionsMeasurement functions:
– online CWSI evaluation including 4 different color maps
– spot CWSI evaluation (Centre) with temperature information
– biomass index evaluation in percentage in real-time
Periodic capturing:
– capturing CWSI image, CWSI video and Visible image simultaneously
Camera modes visualizationPicture-in-Picture, Full Screen RGB with segmentation, Dual-screen
Micro HDMI video output1 280 x 720 pixels (720p), Aspect ratio 16:9, Micro HDMI video output
Software & SDK
Desktop softwareAdvanced Workswell CorePlayer for offline CWSI data analysis
Power supply, weight & dimensions
Input supply voltage9 – 36 VDC, Coaxial 2 x 6.4 mm, outer shell – GND
Power dissipation (avg.)12 W
Weight< 430 grams
Dimensions (L x W x H)83 mm x 85 mm x 68 mm
Mounting2 x 1/4-20 UNC thread (1x bottom side, 1x upper side)
Housing materialDurable aluminium body for long-time measurement stability
Operating temperature range-10 °C to +50 °C
Storage temperature range-30 °C to +60 °C

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