According to Webopedia, firmware is “a combination of software and hardware. ROMs, PROMs and EPROMs that have data or programs recorded on them are firmware.” OK, got that?!?! Practically speaking, firmware is software stored...
IPTC comments are embed captions, dates and other comments such as copyright information that can be placed in digital photos. The information stays with the image and can be accessed by others who use programs that read IPTC.
Resampling brings back detail when an image is resized, as long as it’s not overdone. When an image is reduced in size, information is actually deleted from the image. Information is added when an image is increased in size.
THM files are small files created by a digital camera to act as thumbnails for image and, more often, video files. They are small JPEG files that make it easier to browse a images and videos in playback without having to load the actual media file in memory.