How to obtain the X,Y,Z index of the high intensity stripes/bands appearing the image shown below?

How to obtain the X,Y,Z index of the bluish-green streaks appearing the image shown below?

There are about 3-4 streaks and I would like to detect all the streaks and obtain corresponding X,Y,Z index from the top of the band till the tail-end. I tried using [Gx,Gy,Gz] = imgradientxyz(I) or [Gmag,Gazimuth,Gelevation] = imgradient3(Gx,Gy,Gz)

it only gives the contrast of the below shown image. But does not give information about the location where max peak intensities are observed. Any help is greatly apppriciated.

Thanks!

[Image Analyst]

What original data do you have? Just this crummy screenshot? Where would you get a Z (third dimension) out of this 2-D image? Do you mean the color?