The micrographs were first processed with ImageJ software, where the images was calibrated to its scale, and the background noise was removed by RGB (what is RGD) filter. Further analysis on these images were performed using a Gwyddion V 2.60 software. The filtering procedure was based on Gwyddion software , which is an Open Source project. It is one of the widely used freeware programs, as it provides a wide spectrum for analysis and data representation tools. This software is purposely designed to analyze the height fields of structures captured via micrographic methods. The 3D amplitude of the instability on these coatings was also estimated using this method by setting the cross-section of the micrograph of the coating as a reference. After fixing the top horizontal position of the pre-soaked coating as origin (0,0,0), the amplitude scan was performed using the extract profiles program (using the lines tool) along the horizontal on the surface of the hydrated coatings. A line profile analysis was undertaken using the profile extract function across the section on all the images to quantify the periodic and morphological properties of the thin film coatings. The open architecture of the software also allowed to implement the filtering feature based on the wavelet transform and inverted wavelet transform of the two-dimensional set of data acquired using microscopy. Hence, the fast Fourier transform (FFT) of the instabilities developed on the coatings were estimated using the above tool. These signals were decomposed into mutually orthogonal set of wavelets, which was averaged over the entire scale of the micrograph to obtain the wavelength of the instabilities developed on the coatings.