manual center/size
box region center/size
center: (physical coords)
size: (pixels)
native format image format

Help for Extracting Image Sections

Images derived from a 'parent' file can be used to extract a section from that parent for display. This is useful for large files where the network transfer time becomes prohibitive, or large image dimensions where the browser memory requirements become a problem. In either case, you first display a blocked "represenation" image and then use it to extract smaller image sections.

You can manually specify the center (in physical coordinates from the 'parent' file) and image size (again, relative to the 'parent'). You also can use a Regions box cursor to specify position and size, or use a combination of the two.

For binary tables, you can extract a new table (native format) or convert the extracted rows into an image. The former allows you to operate on the new file as a table, e.g., bin and filter the new table using the Binning plugin. However, the new table might not be much smaller than the 'parent' table if the selected section includes most of the rows (e.g. extracting a bright source).