Estimation of Energy difference of Images for greased concrete surface with time

Regarding to the attached image, we have a study on greased cement cubes absorption of grease.
The intensity (I) of each cube has been calculated and then the Energy (E), E = I^2
the differences between the image energy of each cube in successive times and the original cube surface without painting with grease to show the absorption rate of cement surface ](/t/2147)
the coded images for an image group named as G-10 :slight_smile:
G-10 is the image of the original unpainted surface,
the image name end with 0, 4.5,…18 stand for elapsed hours after painting


Can you clearly define your problem? You described the data that you have but not the actual method that you want to perform. :slight_smile: