What Trackers should be Coalesced?

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‌What Trackers should be Coalesced?

Three checkboxes on the coalesce panel control what types of trackers are eligible to be coalesced.

First, you can request that Only selected trackers be coalesced. This allows you to lasso-select a region where coalescing is required. (Note: if you only need 2 particular trackers coalesced, for sure, use Track/Combine Trackers instead.)

Second, frequently you will only want to coalesce auto-trackers, or trackers created by the Add Many Trackers dialog. By default, supervised non-zero-weighted trackers are not eligible to be coalesced. This prevents your carefully-constructed supervised trackers from inadvertently being changed. However, you can turn on the Include supervised non-ZWT trackers checkbox to make them eligible.

SynthEyes will also generally coalesce only trackers that are not simultaneously active: for example, it might coalesce two trackers that are valid on frames 0-10 and 15- 25, respectively, but not two trackers that are valid on frames 0-10 and 5-15. If both are

autotrackers, if they are simultaneously active, they are not tracking the same thing. The exception to this is if they are a large autotracker and a small one, or an autotracker and a supervised tracker. To combine overlapping trackers, turn off the Only with non- overlapping frame ranges checkbox.

A satisfactory approach might be to coalesce once with the checkbox on, as is the default, then open the dialog again, turn the checkbox off, and Examine the results to see if something worth coalescing turns up.

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