Most people, including myself, have some sort of blemish, scar, or imperfection they wish they could keep from showing up on camera. After Effects CC has developed a new matte tracking process that makes removing unsightly blemishes a breeze. In this tutorial I will show you how to complete the effect in three simple steps.
– Creating the Matte
– Tracking the Matte
– Removing the Blemish
CREATING THE MATTE
To start, lets create a new composition with our footage and take a closer look at what needs to be retouched.
In this clip I can see we need to do some blemish removal in the cheeks and along the jaw line. Additionally, if you notice near the right ear (stage left) there is a long stray hair we can also quickly take care of with this technique. For now, let’s focus on his right cheek (stage left).
Essentially, the process is simple but time consuming. We need to focus on each blemish individually, and create a sample clean area that matches the blemished area to be superimposed and smoothed over on top to create a seamless appearance. To do that, first DUPLICATE THE SOURCE FOOTAGE. We will need to duplicate the source footage EACH AND EVERY TIME we need to create a new blemish cover. Then, create a mask that isolates the blemish and the extends out to take a sample of the clean surrounding area; just as this picture shows in detail.
TRACKING THE MATTE
By isolating the blemish in the matte it creates a great tracking marker for the program to follow. Now, RIGHT CLICK on the matte and choose TRACK MASK.
A window in the lower right will now appear with TRACKER CONTROLS
The default method tracks position, scale, and rotation which will be fine for this example. Next to ANALYZE, select the forward arrow and allow After Effects CC to track the mask throughout the duration of the clip.
In your timeline, this will create a series of keyframes tracking the mask to your subjects movement. It is important to have a perfect track in order to ensure the blemish cover moves along with the subject to create a seamless and clean appearance. If the track was unsuccessful, some helpful tips would include:
– Analyze frame by frame and move the mask manually back on point when it loses its subject to ensure a locked track.
– Start at the end of the timeline and analyze backwards (sometimes starting with a different point in time helps the computer algorithm lock on better and understand your point of focus).
REMOVING THE BLEMISH
Once you have a mask sampling a clean area of the skin and tracked that mask to the subjects face throughout the duration of the clip, it’s time to get rid of that blemish! Using the directional arrows on your keyboard, or clicking and dragging with your mouse, move the mask on top of the blemish area
You are probably saying, “That just moved the blemish over with the mask! It didn’t fix anything!” – well – we’re not done yet. At this point, open up the mask tools by having the mask selected in your layer window and hit MM on your keyboard to open up the entire tool set.
REDUCE the MASK EXPANSION so that the blemish sample disappears and you just have a small sample circle to use.
INCREASE the MASK FEATHER to smooth out the sample’s circle edges, thusly blending it into the face, creating a smooth and clean finish that follows the face throughout the clip.
You now just successfully removed ONE blemish. Depending on your subject, you may have more to go. Just repeat the process as described as many times as necessary to create the final retouched image.