Image Writer (Table)

This node takes all images in a certain column of the input table and writes them, each as a separate file, into a directory. It will append the paths of the written files to the input table as well as the corresponding write status (created, unmodified, overwritten).

This node can access a variety of different file systems. More information about file handling in KNIME can be found in the official File Handling Guide.

Options

Folder

Select a folder where the image files will be stored. You can specify the file system and path.

Create missing folders

If enabled, missing folders in the output path will be created automatically. If disabled, the node will fail if any folder in the path does not exist.

If exists

Specify the behavior of the node in case the output file already exists.

Fail: Will issue an error during the node's execution (to prevent unintentional overwrite).
Overwrite: Will replace any existing file.
Ignore: Will ignore if a file already exists and continues the copying process.

Image column

Select the column containing the images to write to files.

Remove image column

If enabled, the image column will be excluded from the output table.

Generate file names

If enabled, file names will be generated using a pattern with an auto-incrementing counter. If disabled, file names will be taken from a column in the input table.

File name pattern

The file names will be generated using the provided pattern. The pattern must contain a single "?" symbol. This symbol will, during execution, be replaced by an incrementing counter to make the file names unique. The file extension will be detected automatically and must not be specified.

File name column

Select the column containing the file names for the output images, or select RowID to use row IDs as file names. The file extension will be determined automatically and should not be included in the column values.

Input Ports

: Table that contains images.
…: The file system connection.

Output Ports

: Input table plus additional path to saved images plus the corresponding write status (created, unmodified, overwritten).

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Installation

To use this node in KNIME, install the extension KNIME Base nodes from the below update site following our NodePit Product and Node Installation Guide:

v5.11

A zipped version of the software site can be downloaded here.

Plugin provider: KNIME AG, Zurich, Switzerland

Plugin version: 5.11.0.v202602201626

On NodePit since: 2026-03-10

Last update: 2026-03-23

Tags: StreamableModern UI

KNIME versions: Since v4.4

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