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Avoiding problems

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Changing modes

If you have set keyframes on a Color Correction node and then change its mode (say from RGB to HSV), the keyframes remain - but they work in the new mode, in an unpredictable way. For example, if you have a keyframe that is altering the yellow brightness, and then change the node to work in HSV mode, the keyframe may then affect the gamma saturation.

We therefore recommend that after changing the correction mode, you view the results of any existing keyframes, or delete them.

Using multiple components in RGB or HSV modes

Remember that a node can only alter a single component at a time. For example, say you have a keyframe set to hold a +20% red correction. If you then add a later keyframe set to hold a -10% green correction, the red correction will cease at that keyframe.

We therefore recommend that - if you wish to correct multiple components of an image - you avoid any confusion either by using Graph mode, or by using one node for each RGB/HSV component.

Using other filters

We recommend that you apply color correction before other filter nodes, especially those which smooth or blur the image - such as the Blur node. This is because color correcting a smeared or blurred image can introduce unwanted dark fringes around their edges.

Titan House, Castle Park, Cambridge CB3 0AY, England Tel: +44 (0) 1223 488200 Fax: +44 (0) 1223 488201 e-mail: support@cambridgeanimation.com

Animo NT User's Guide - Version 2.0 - 29 Jan 1999 Copyright © Cambridge Animation Systems