how can i calculate gradient strength and orientation using sobel operator?

hi , i dont know , how can i calculate gradient strength g and orientation α∈ (0, π) are extracted at each location n, m from each image using the Sobel operator ! there are a pair of factors G ( ∗) and H ( ∗) are used to define relative strength (gradient information) and orientation “change”,which are shown as:

help me please

Answer 1

[Image Analyst]

Have you seen imgradient() and imgradientxy()? They do that.

[maso0m aBbasi]

Yes, I saw a little bit earlier. Thankful

Answer 2

[Selva Karna]

you have apply after sobel apply cnr ratio?

[maso0m aBbasi]

no,that is a part of an improved fusion rule based on edge preservation is proposed to preserve the geometric structural information. The edge preservation is on behalf of the edge information from the separated image. For source images A, B , the cartoon and texture images X ( At ), X ( An ), X ( Bt ), X ( Bn ), the spatial information preservation measures

 are defined as: