How can I write png image column into database (blob)? (SOLVED)

Using the database writer node deson't write the actual image data into the database but some string:

org.knime.core.data.image.png.PNGImageContent@1bf2ac6

How can I write the images binary data into a database blob field?

 

OK, already found solution. Use "PNG to binary objects" node  and then the database writer. It can then be converted back to an image by the "binary object to png" node.