Hello @Robinvm
It isn’t clear from your description if your png files are stored in a drive… or they are already loaded into into the KNIME workflow; within a table or in an output port image.
Your first task should be to incorporate them into a table: ‘Image Reader’, ‘Image to table’ (from image port) …
Once the images are incorporated into a table as Image format; two options are ‘Tile View (Java Script)’ or ‘Table View’. You have few examples in JKI S03 CH07 from two weekly challenges ago.
BR