I have been trying a few methods to automatically read the meta-data files from a vast library of pictures I need to process and balance. I want to be able to just pull the Exposure time and ISO in order to do this. However, the Exif methods result in no listing for exposure time or ISO even when I call the specific bit address it is empty.
However, when I pull up the properties in Windows, I see the exposure time and ISO. I tried to use an IPTC data grabber, but that didn't work because the pictures were in the.DNG file type.
Does anyone know of a library that I could use & some code to extract this data?