Fuente: Wipo "precision agriculture" A method for assessing at least one condition of a plant material is provided. The method may include providing a spectral image, normalizing the spectral image to generate a normalized spectral image, processing the normalized spectral image to generate at least one processed spectral image, providing a palette file, and generating a displayable false color image from the at least one processed spectral image and the palette file. The method may include capturing a multi-spectral image of the plant material with a multi-spectral imager. The plant material may be a portion of a cannabis plant and the condition may be one of, or relating to, health. A non-transitory computer readable storage medium storing a computer program for performing the method is also provided.