I have been having some problems with the image processing
1) if there is an error reading an image file, the file is not closed so therefore cannot be deleted (on Windows at least) until one exits KNIME. This is annoying since the files can't then be re-written to address the problem without restarting KNIME.
2) it seems problematic to read jpg images directly from URL's (using the table reader). The documentation suggests that I can do this, but I get errors. Even writing the images to a file, then reading the file is problematic.
These are straightforward JPG images that display fine in the browser, and by image-viewing tools when saved as files. The log tracebacks are attached. The actual JPG image associated with the traceback is also attached.