Dear Kishori,

Please take a look at Gwyddion, an open source software for MFM image processing:

https://www.degruyter.com/document/doi/10.2478/s11534-011-0096-2/html

In case you would like a reference on interpreting these images, please see this publication:

Article Local control of magnetic anisotropy in transcritical permal...

I hope this helps

What is the extension of the above-mentioned photograph? is this file a .jpg image or something else?

Try this code:

I=imread('MFM 02.jpg');

J=rgb2gray(I);

S=fftshift(fft2(J));

imshow(uint8(abs(S)))

Kishori Lal Have a look https://www.youtube.com/watch?v=9xRSW-CgUq0

Sanjay Gaur Thank you so much for the help

extention for the images is .sm4

Nathan Zavanelli Thank you for the help

Qamar Ul Islam Thank you for sharing the link