just detrend

performs line-by-line detrending or flattening of a matrix up to arbitrary expansion order

just detrend. Simple script for line-by-line detrending of a matrix. Useful for flattening topographic images such as from AFM or STM. Note that this is not a plane fit but a line-by-line flattening/detrending. This script makes use of the polyfit function and can detrend/flatten up to arbitrary expansion order.

jdetrend(Img,dimension,order)
Img = image data matrix. dimension = 1 or 2 - detrend along rows(1) or columns(2).
order = expansion order in polyfit.

Example:
To remove trends up to cubic order from an AFM image that was scanned horizontally:
dataOut=jdetrend(dataIn,2,3);