Made a couple of changes here. In vil_jpeg_compressor, a quality setting was added to allow for saving of images at something other than 75 (which is still the default). The quality setting is made on a per-compressor basis.
In vil_j2k_image two new methods were added: get_copy_view_decimated_by_size and s_decode_jpeg_2000_by_size. These methods allow saving to a specified size rather than having to specify a scale factor.