EX8: Matchmoving & Stabilisation

Matchmoving:

What is Matchmoving?:

This is the process that allows you to composite computer graphics with your footage and syncing the movement with what is called ‘tracking’ so it appears that the graphic is moving in the scene.

What tools you can use?:

Tracking Points: Which you can use to place dots to track the position, rotation and the scale.
Warp Stabiliser: Helps stabilise the footage and will cut corners and warp to help create the illusion of stillness.

Which areas are more easy to track?:

Any area that has more detail are easier to track for the software as its easier to pick up more of the features in different positions, whether it be wrinkles, spots, or small patterns that are common within the subject.

My attempt:

First I converted the footage of the hand with blue dots into a TIFF image sequence. Then I took the first frame of the sequence into Photoshop, and began to hide the dots using the clone stamp tool, which duplicated the patterns on one part of the subject to hide the dots keeping its appearance natural.

dotty1.png
The layer for hiding the blue spots to later be applied to the footage.

I then tracked the hand with the use of the blue dots, and used two tracking points with ‘track rotation, scale and position’ enabled, it then begins processing the frames and created a path for the dots to move with the hand.

dotty1.png

I then added the hand corrections to the path and rendered the video out, leaving me with this result:

 

As an extra task, I then decided to add a tattoo to the hand, and decided to use this PNG image.

Homerz

And feathered it slightly, so that it would look as though it was part of the skin, and this was the result:

 

Stabilising:

Why Stabilise?:

This is to take footage that has unwanted movement (i.e. shaking) and getting rid of the movement. This also makes the footage easier on the eyes, and easier to track things onto.

My attempt:

We were supplied footage of a keyboard that would shake as it was playing, and then tasked with using After Effects to get rid of the shaking, below you will find the exact footage we were given, and as you can see it moves quite a lot.

First I imported the footage over into After Effects, and dragged the clip into the preview space, but before I could work on it, I must change the video from 30fps to 25fps as we are from the U.K region.

I then use the warp stabiliser (like mentioned above) to analyse the footage, which it then processes automatically, after giving it time to do this, I change the motion settings from ‘Smooth Motion’ to ‘No Motion’.

I then selected the option to stabilise along with cropping and auto-scaling, and then after this, I used the subspace warp too.

I then preview the video to make sure it is working correctly, and see that it still has grain visible, making it clear that footage is being played, and then rendered it out, the final result can be found here:

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s