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# Performing a Focus Match

O_FocusMatcher has two different modes you can use to perform a color match: Match Edges mode and Reconstruct Edges mode. Both modes require an O_DisparityGenerator node and an O_OcclusionDetector node upstream of the O_FocusMatcher node.

To perform a focus match, complete the following steps:

| 1. | If they don't exist already, insert an O_DisparityGenerator node and an O_OcclusionDetector node after your stereo clip. See DisparityGenerator and OcclusionDetectorfor more information.

| 2. | From the toolbar, select Ocula > Ocula 4.0 > O_FocusMatcher to insert an O_FocusMatcher node after the O_OcclusionDetector node. Your node tree should now look something like this:

| 3. | Select the required mode from the Mode dropdown in the O_FocusMatcher controls. You can use the Match Edges mode or the Reconstruct Edges mode. See O_FocusMatcher Controls for more details about the different modes.

| 4. | Select the two views you want to use for the color match under View to Use. The two views you select are mapped for the left and right eye.

| 5. | From the Match menu, select either Left to Right or Right to Left depending on the direction in which you want to perform the focus match.

| 6. | Adjust the Local Matching and Occlusion controls to get the best possible result. See O_FocusMatcher Controls for more information about the controls.