Webdesigner: How to get Dialog pictures in greyscale?

Hello,

i'm trying to use some images of the table DialogImages in the Webdesigner-Frontend.

As the pictures are used for a Toolbar i need them one time in normal colour and the other time as a greyscale picture.

I have triedthe following3 ways. But alldoes not work orareunpleasant.

1. Using the ControlType Image and the source Dialog pictures

This does work as expected. But how to get them in greyscale?

2. Using the ControlType Image and the source URL

This does also work for the colored pictures. But the "&state=disabled" also returns the colored picture

3. Using the ControlType Image and the source Database Object.

This works. But honestly i don't want to set up a collection, a Data Action to load the image and an Iteration Container just to show a picture.

Also I don't want to set up new project files for images that are already in the database.

So is the a quick way to get the images of the table DialogImages in the WFE in greyscale?

Thank you in advance.

Best regards.

Martin