If you want to use the same photo I use for this tutorial click here.
Go to Image>Mode>Lab color and select it.
Now select the channel,you obtained by selecting the lab,like in the picture.
Select only "a" channel. It should look like this,but don't worry it's good.
Now press Ctrl+L and set these values for the levels.
Do the same thing for the "b" channel and set these values.
Now select the lab channel like in the picture.
So this is you initial photo.
And this should be your final result!
I hope you liked it!
