The CropFocus layer is an intelligent mask that works with any activated agricultural index layers beneath it (such as NDVI), allowing users to better interpret and showcase variability across the target crop. By masking out soil, shadows, roads and other non-agricultural features in the selected agricultural index, users can uniquely expose variability where it matters, and even see and count individual plants.
The default position of the slider has been designed to focus your chosen agricultural index values solely on vegetation while blocking out most non-agricultural features. If you move the slider to the right, you increase the effect of the mask but risk masking out the target vegetation.
If you move the slider left, you lessen the effect of the mask and risk allowing more soil and other non-agricultural features through the mask. If you slide it all the way to the left, the mask will be disabled and index values will be displayed for each pixel of the captured data.
For example, if you enable NDVI but notice that it does not appear to be covering your target crop (trees, vines, and other vegetation), you could reduce the mask until you see the NDVI values for your target crop.
On the other hand, if you see that the NDVI values are covering roads or soil and you would like to reduce that, you could slide CropFocus to the right until the NDVI values cover just your target crop/vegetation.
CropFocus updates the histogram
When adjusting the CropFocus, note that the histogram of the visible layers updates as well to represent the visible pixels. Observe the histogram in each of the settings below:
CropFocus off (less)