Good day Rama Krishna Sharma,
here are the orientation salience functions of windowed parts of your images:
An orientation salience function is a kind of histogram and may be normalized accordingly. In fact it is a weighted histogram, i.e. intensity/contrast of the structures are taken into account. For your SEM-images, the latter appears of minor influence, i.e. the orientation salience functions can be regarded as orientation histograms in the geometric sense.
If this is of any help for you, I shall point you to the relevant publications.