i want to do a supervised classification for images on ERDAS, using GIS, i clipped the areas i want to use as training/signature from the original images. but i just can't create a signature file, because they need to be in AOI format.
I already tried to convert them to shapefiles (raster to polygon tool), and enter the shapefile on ERDAS. All tutorials i have seen so far require to cut or draw an AOI from the image manually.
How do I convert these clipped areas to AOI files without having to cut anything from them?