I will warn you that this post may be a little long with several screen shots, but I always do better with tutorials with lots of explanation and photos. If you are not real familiar with your Photoshop program this my be a good way to learn a little more about it. I have yet to grasp everything this program is capable of. If the screen shots are not big enough you should be able to double click on them to see them bigger.
First choose a profile picture. If you are making one of a girl/woman you may want to have the hair up. It makes the silhouette better in the end. Open the photo in your program. Go to your full edit workspace. Next your will want to make a duplicate of your background photo. You can do this by right clicking on the little photo on the right of your screen, and chose duplicate image.
Now, under the drop down arrow right above your duplicate image, you want to choose "vivid light".
At this point the coloring in your photo should have changed a little. Don't freak out, this is how it's supposed to happen. You can now flatten your duplicate image by right clicking on it, and choosing flatten.
Now choose your magnetic lasso tool to trace around the head and neck of the photo. When you are finished double click and you should see marching ants where you traced.
It's time to fill the image by right clicking where your have traced and have the marching ants. You will choose "fill selection". Under contents choose black.
Now you should feel like your getting somewhere. Next, click "select" and then "inverse". You should now see marching ants around the frame of your photo.
Lastly, you go to "edit" and select "delete". You should now be left with your silhouette.
How fun and long was that! It seems like it takes a while at first, but after a couple it takes no time at all. Thanks so much for checking out my blog. Let me know it you have any questions. I will try my best to help.