I'm trying to achieve accuracy assessment in Erdas, but I've faced some difficulties due to my lack of knowledge about it.
I've finished an object based classification in eCognition, but whenever I try to obtain an accuracy assessment, it always give %100 accuracy with TTA mask, so I gave up.
now, I've decided to get that accuracy results from ERDAS because of high reliability to ERDAS among the users.
I've got classified shapefile and the raster file I've used to achieve classification. in ERDAS, it asks for an .img file which is a thematic raster file it says. so how can I generate an .img file from my existing .tif and .shp files? or is it even necessary to execute that process?