I have converted the DN values to the reflectance of a Landsat image to classify the rice field by its stages. To specify the reflectance values of each stages, I have sampled the reflectance values from the converted image. However, I would like to find (spot) the rice paddies that have the same or similar reflectance values of the previous samples... How do I do this in ERDAS 9.2?
I have tried the ARCGIS but seems to not have such functions in the software. In ERDAS I found 'Target Detection' in the 'Spectral Analysis' but it could only be used based on the library(correct me if I am wrong), not my own specific values.
Is there anyone who have tried this kind of work before? Please Help!