void SaveInitialValues(); // will belong to the future PixelData class
void RestoreInitialValues(); // will belong to the future PixelData class
void DeleteInitialValues(); // will belong to the future PixelData class
void SaveInitialValues(); // will belong to the future PixelData class
void RestoreInitialValues(); // will belong to the future PixelData class
void DeleteInitialValues(); // will belong to the future PixelData class