Add support for tags 50838 and 50839 in tif files #291
Description
In some tif files saved by ImageJ, there is to tags unknown from TiffTags.py:
tag 50838 and 50839.
In the ImageJ source they are defined as:
public static final int META_DATA_BYTE_COUNTS = 50838; // private tag registered with Adobe
public static final int META_DATA = 50839; // private tag registered with AdobeIt also would be useful if we could save them.