The selection of sensors (link) depends on your objectives. I.e., what do you wish to know from the image? Is it a stress level? If so, what type of stress? Below are some common examples of vegetative indices used to monitor crop health. Vegetation indices are crucial for assessing the health and growth of vegetation.
VARI was originally designed for satellite imagery. It is a vegetation index the uses only light waves from the visible light section of the spectrum (Red, Green, Blue). It puts a quantitative value on vegetative fraction estimation (VARI = (Green – Red) / (Green + Red – Blue). The index is only affected by atmospheric
Precision Analytics: Agriculture is a complete Mapping and Analytics web-based platform for precision agriculture crop data management that uses images captured from drone flights. The process for using this web-based portal goes as follows: Collect the image data with your drone and upload the data to your account where you can generate deliverables such as: