make pixel and kernel size dynamic

[Clemens-E]

Description

See #703

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [?] This change requires a documentation update

not sure on the documentation

How has this change been tested, please provide a testcase or example of how you tested the change?

I have not changed any tests

Any specific deployment considerations

For example, documentation changes, usability, usage/costs, secrets, etc.

Docs

• [ ] Docs updated? What were the changes:

[CLAassistant]

All committers have signed the CLA.

[Clemens-E]

Sorry I'm a bit lost with the tests cases, what would I have to adjust?