AgriTrak2001 Theming of an Image Image enhancement divides the image into different classifications or themes. This is an index of different growth or vigor classifications. Each color represents a different growth grade from the least to most dense according to the legend.
Imagery is very good at identifying differences within a field or block.
However, determination of the cause of these differences requires ground truthing. The same growth grade in separate parts of the field may be caused by a completely different set of factors. Using this index can be very helpful in determining the degree and range of variability within a field and for developing a sampling strategy.