Hi Dolores,
sorry, I know nothing about the COQ plugin.
Assuming you have a Gaussian PSF, there is a very simple solution that
requires no plugin:
You can take a line profile over an edge and fit an error function with
Data>Add Fit...
The log window then tells you the parameters.
Divide parameter 'd' by sqrt(2) to get the sigma of the Gaussian.
It would be rather easy to write a macro that does it with a single
keystroke.
Michael
________________________________________________________________
On 26.06.25 12:11, M Dolores Morillas Perez wrote:
Hello.
I am a new user of image J
I have problem with MTF calculation with plugin COQ.
When I have analized an horizontal edge with plugin COQ, the values of
MTF (Y AXIS) is NaN
Could you help me?
Kind Regards,
Mª Dolores Morillas
Medical Phisicist
H.U.V.V
Málaga
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