3.7. Red Eye Removal

3.7. Red Eye Removal
	3. 增强滤镜

3.7.1. Overview

图 17.27. Example for the “Red Eye Removal” filter

Original image

“Red Eye Removal” applied

The aim of this filter is - guess what - to remove red eyes from an image. Before applying the “Red Eye Removal” you must do a selection (lasso or elliptical) of the boundary of the iris of the eye(s) having a red pupil. After only you can apply the filter on this selection. If you don't make this selection, the filter inform you that : “Manually selecting the eyes may improve the results”.

3.7.2. Activating the filter

This filter is found in the image window menu under Filters → Enhance → Red Eye Removal….

3.7.3. Options

图 17.28. “Red Eye Removal” options

Preview: If you check “Preview” you can see the modifications in real-time in the preview window. And you can choose the good value of threshold compared with what you see, and then validate it.
Threshold: If you move the cursor of threshold the amount of red color to eliminate will vary.