Extended range of Grey-scale analysis wanted!

Hello there,
so far, Premier offers as Grey-scale parameters only heterogeneity, maximum, minimum and mean grey value and standard deviation. In recent research, there a new parameters used, particularly contrast, mean gradient value and normalised grey-scale histogram width. Has anyone used these parameters in Premier before and have macros or projects for me? I have not the skills for programming on my own, but need these parameters for my research.
Thanks a lot for your help,
Svenja
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