Edicion en photoshop

[Moapit]

Hola, es mi primera cosulta en la comunidad, me gustaria poder editar la nervadaura secundaria de la imagen de una hoja, que tienen un tono oscuro diferente al del nervio principal de la hoja.

Adjunto la imagen de muestra si alguien quiere orientarme

Un saludo 

[Trevor.Dennis]

Are you asking how to mask the veins of the leaf?  There is so little contrast between any two part of the leaf, so you are asking a lot.

I was wondering about a Luminosity mask, which gets a sort of result but I doubt it does all that you need.  The result below was obtained with the free luminosity mask by Sven Stork, which you can get from menu Plugins > Manage Plugins.