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Dfx User Guide - Tiffen.com

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52 General Tutorials<br />

•<br />

Filled Trimap Tutorial<br />

EZ Mask creates masks by using a trimap--a pre-segmented image consisting<br />

of three regions of foreground (what you want to isolate), background and<br />

unknown. Partial opacity values are then <strong>com</strong>puted only for pixels inside the<br />

unknown region. Two trimap methods can be used: Stroke and Filled. This<br />

tutorial will use the Filled method.<br />

Foreground and background brush strokes are used to mark definite<br />

foreground and background pixels while the Unknown brush is used to mark<br />

unknown, or mixed regions. Using this method, the entire image is painted/filled<br />

with one of the three brushes.<br />

Foreground<br />

Filled Trimap<br />

1 Apply <strong>Dfx</strong> to an image.<br />

2 Select a filter and preset that changes the image in an obvious way.<br />

3 Click the Add Mask icon in the Toolbar and select EZ Mask.<br />

Note: Once EZ Mask is selected, the effect of the filter in the Viewer can no longer be<br />

seen until a mask is created.<br />

<strong>Dfx</strong> <strong>User</strong> <strong>Guide</strong><br />

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