This essentially wraps the image header, so that all values are read from and written to the image header. However, updates to the image header will also update the table header where appropriate.
Note that if no image header is passed in, the code will instantiate a regular Header
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Header object for compressed image HDUs designed to keep the compression header and the underlying image header properly synchronized.
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them
