I have various scanned images in different file formats (jpg, tiff, png) and I need to georeference, clip and export those images.
As a result I need to have a 8 bit png file with transparacy (the clipped areas) on index value 255. I'm currently using ArcGIS but have QGIS and ArcGIS Pro available, but I'm somewhat struggling to accomplish this task. The 'errors' are ranging from completely black images outside of ArcGIS, having transparency for specific colors in the whole picture or having no 8 bit at all.
Could someone describe a workflow GUI- or script-based, preferably in ArcGIS but QGIS or ArcGIS Pro would be possible too.