This exercise follows on from the previous New Primary Colour Correction tools in FCP X (Exposure).
In this exercise we will be looking at the new saturation controls in Final Cut Pro X (which to avoid any debate is pronounced 'Ten'). Similar to exposure the saturation levels are part of Final Cuts Color Board workflow. To begin with we will open up the Saturation controls.
Select a clip in the timeline that requires balancing then open the Color Board by selecting Show Color Board from the enhancements menu or type Command-6.
The Color Board opens and reveals the three parameters, Color, Exposure and Saturation. Click on the Saturation tab at the top to choose that.
The display reveals 4 handles that will control your images saturation level. The Black, Grey and White handles inside the scale represent Shadow, Mid-tone and Highlight levels, respectively.
Sliding the highlight handle up will increase the saturation of the lighter toned colours as indicated by the small RGB icon at the top of the scale. Sliding the shadows handle down will in turn desaturate the darker toned colours, again as indicated by the RGB icon at the base of the scale.
The larger slider to the left of the scale is a Global controller and adjusts saturation levels across the colour spectrum. Handy when you want to desaturate the entire clip.
Tip: Making fine adjustments using these handles may prove a little tricky, so instead try using your cursor up and down arrows to take small incremental steps, just remember to select the correct handle to adjust before you start.
Your eye is a great tool when colour correcting a clip, but it's easily fooled, so don't rely on it exclusively. The real trick to controlling saturation levels is to understand and use the correct Scopes.
First let's activate the scope. From the Viewer Display Options choose Display > Show Video Scopes or type Command-7.
This will switch on the video scopes that more accurately measure your colour adjustments. Once the scopes are open we need to choose the Scope that measures Saturation levels. To do this, from the scope's Settings menu choose Settings > Vectorscope from the DISPLAY section of the menu.
The Vectorscope measures saturation by using a circular graph. Note on the graph that there are markers placed around the graph that read R (red), MG (magenta), B (blue), CY (cyan), G (green), and YL (yellow). These markers indicate where on the graph each colour channel should rest. The graph also has a center point and a diameter edge. The center point represents 0% saturation and the Diameter edge represents 100% saturation.
Try moving the Global saturation handle down until it reads approximately -90%. Notice the vectorscope pulls all the color information down towards the center spot, and your image desaturates considerably.
Now try going to the extreme and drag all four handles up over 80% and notice what happens in the vectorscope: your saturation values will have exploded across the vectorscope like some kind of Galactic Nebula! Your image will be unusable also, I imagine.
In reality you'll be looking for somewhere in-between. The main function of the vectorscope, as well as to keep saturation levels in check is also to assist you in creating balance from one shot to another, to aid the smoothness of transitions and help maintain shot continuity.
Now try to create some balance between some shots yourself. Use the vectorscope to monitor the changes. If it all goes wrong, don't worry. Click the curved Reset arrow in the Color Board and try again (careful though, as it resets all four values at once).
Tip: Balancing faces is usually the primary objective for saturation adjustments. Try using the mid-tone handle first if your footage has skin-tones.