Code: DT007
Delta-T Devices was one of the first companies to develop leaf imaging technology for disease area estimation. The WinDIAS 3 leaf area measurement system builds on that expertise, making use of high-resolution camera and scanner technology to provide researchers with an analysis tool that is powerful and yet easy to use.
The WinDIAS system is available in three versions – Entry Level System (with A4 scanner), Standard System (with video camera), and Rapid System (which adds a conveyor belt unit, and can process up to 800 leaves an hour).
WinDIAS features
Rapid thresholding
Three thresholds can be set, each based on a different user-defined range of colours. The primary threshold is used for the main zones of interest in the image, e.g. healthy areas. The secondary and tertiary thresholds are used for other zones, e.g. diseased or variegated areas. Thresholds are set by a simple point and click with the mouse in a region of interest. The areas selected are immediately visible as overlays on the image.
Measurement and editing
WinDIAS analyses the thresholded regions to measure area, perimeter, length, width, circularity, elongation and shape factor. Calibration is carried out against a ruler. Images can be edited on-screen, enabling the user to retouch boundaries, separate objects that overlap, remove undesirable “noise” and holes, add or erase lines or rectangles, and fill bounded areas in any colour.
Object count
Seeds, needles, or other small objects can be quickly counted by WinDIAS (even when touching). Colour thresholding enables easy discrimination of different types of object, or disease spots. Dust and debris can be excluded by defining a minimum object area.
Exchange of data and images
WinDIAS imports images in bmp, jpg and tif formats, and results can be saved as txt files for easy import into Excel. For reporting and further analysis, all results and images from WinDIAS are easily exchanged with other Windows applications.
Fast batch processing of image files
WinDIAS can automatically analyse large numbers of leaf images by operating as a virtual conveyor. This feature saves a great deal of time when processing images acquired in the field or when sent in for processing from a remote research lab. Images in bmp, jpg, or tif format are all suitable for processing.
Batch processing mode is simple to use – just select the folder holding the target images. WinDIAS will then automatically load each image in turn, measure it, and save the results back into the same folder.
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