Category: VFX Fundamentals Unit

Nuke phone tracking

This week we were looking at colour correction on scenes and frames.

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In this lesson we are looking at Rotoscoping.

We manually drew around and cut out objects from movie frames so that the required parts of the image can be used, this is known as rotoscoping. We can use this to change the subjects background or layer effects. I went through each frame adjusting the points until they matched the running mans limbs.

The parts of an image that are wanted after cutting out are known as mattes.

We used the ‘Beziers’ tool to draw around and create an Alpha channel for the running man.

This week we are looking at Nuke. Nuke is made up of ‘Nodes’ and ‘Layers’ something that I have seen before in programs such as Photoshop and After Effects. It is used for digital compositing and visual effects. Working with Nodes was a somewhat new concept as I have only used layers before.

After a short while I was able to create the image below using various tools such as Merge and Transform (as can be seen in the Nodes above). We ‘Merged’ the Checkerboard and ColourWheel, and then used the ‘Transform’, ‘Glow’ and ‘Blur’ Nodes to edit the image. I now have a good understanding of these tools and have used them with other images to practise.