Before processing the grain filter, the image must be analysed. Use the Grain Analysis panel to perform an analysis on a selected frame. The grain profile for the shot is recalculated each time an analysis is performed. If you navigate to a different frame in the shot and analyze it, the grain profile will be based on the new data.
Note: It is recommended that you perform an analysis on the entire image, then analyse multiple regions of the image, if required.
To analyse the grain profile of an image:
- Navigate to the frame you want to analyse.
- Do one of the following:
- If you want to degrain the entire image, click Degrain in the Image menu.
- If you want to degrain a region of interest, click Degrain in the Colour menu.
- (Optional) Enable the Sub-Region Analysis button and define an area to analyse. For best results, define multiple regions of uniform colour with no features. See Working with Sub-Region Boxes.
- Click the Analyse button to determine the grain structure.