Batch Analysis of Digital Images to Evaluate Turfgrass Characteristics
Douglas Karcher and Michael Richardson
Department of Horticulture
Crop Sci. 45:1536-1539)
Download SigmaScan Pro
macro for batch analysis of turf images: Turf Analysis.bas.
(right click link and then choose “Save Target As…”)
Detailed instructions on using this macro have been published in Crop Sci. 45:1536-1539.
Click above thumbnail to view a screen shot of the original Turf Analysis macro running from within SigmaScan Pro.
Turf Analysis 1.2 now available: allows browsing for images to be analyzed (does not require entering the file path fixed bug that advanced “To Sat” value by one with each macro execution.
Macro-related questions or suggestions for improvement should be directed to Douglas Karcher.
A reoccurring problem with the Turf Analysis macro is an error that results from analyzing high resolution images, especially those with relatively low green turf cover. Analysis of such images may “crash” the macro because there are not enough worksheet rows for making calculations on image objects that have been selected during the color threshold process. In such cases, the macro stops running and the user will see the macro code with the following statement highlighted:
Digital Image Analysis Reprints
Reprints of publications related to digital image analysis may be requested from Douglas Karcher.