Hi Elisabeth,

that looks pretty awkward. To my mind that does not look like a repeating deterministic shift pattern for the individual image rows. 

Please see the attached pictures with two detail areas of your image. I am not able to identify a repeating shift pattern for the rows in these images. I might be wrong, cant recognize it, or maybe the shift is arbitrarily, but I am not sure if you can just "automatically correct these shifts".

Well, of course you could just blur the image, but I doubt thats what you are looking for ...

If the image you posted is the "raw result image" from the device, in my opinion it looks more like something sensor related: maybe the sensor is skipping rows during acquisition, maybe an error in sensor-internal data (pre)processing, maybe misconfigured sensor parameters, or the device might need (re)calibration ... maybe something completely different.

I would suggest to focus troubleshooting on the sensor first, instead of looking for a solution how to fix the resulting images. If that does not solve the problem, it may be helpful to do consecutive scans of reference sample / pattern to further explore the shift.

Best, Robert

Dear Elizabeth

Could You take few images with different scan speed ?

For me it looks like disaster, and I am not sure that it is possible to remove it via postprocessing. 

I would try to figure out what is the reason of that noise (electrical or vibrations) instead of trying postprocessing.

I know that You have a lot of experience so maybe You already know what is the reason of that :)

with best regards

Tomasz

You can try deinterlacing algorithms.

Dear all,

thanks a lot for your answers. It appears to have been due to vibrations caused by construction work...

with best regards

Elisabeth