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On a 3:2 telecine pattern, vinverse() the 2-field image, and for the 3-field image, average the 1st and 3rd fields, match with the 2nd field and vinverse() the result to smooth the remaining combing. But sometimes vinverse() cannot cancel the combing, especially on oblique, thin and and highly contrasted lines (mostly with anime/cartoon sources). In this case you could replace vinverse() with daa(). You could also limit the changes by the difference between the average lumas of the two fields.
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