![]() However with an image that is larger than 65500*65500 pixels (which is actually 122880*78848 pixels), these four bytes that supposedly represent image height and image width are all zeros. In a JFIF header, the third and fourth bytes after the FFC0 marker represent image height the two bytes afterwards represent image width. If this is an image smaller than 65500*65500 pixels, then I can open the file just fine if I save the data stream into a jpeg file. The data stream has all the correct signature for a JPEG file, such as FFD8, the start of scan marker and FFD9, the end of scan marker. Using StripOffsets and StripByteCounts, I'm able to extract the data that's supposed be a JPEG file. The NDPI file uses a modified TIFF structure and stores image content in one big chunk in JPEG format. I'm trying to extract image content from a file generated by Hamamatsu NanoZoomer slide scanner.
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