ACDSee automatically adds file information and thumbnails to the database as you browse. This process is called cataloging. Once the folder you are browsing has been cataloged, ACDSee begins the process of detecting faces in your images. As you open other folders, ACDSee will continue scanning for faces in the first folder, and will queue subsequent folders as you open them. ACDSee will continue scanning until Face Detection is complete on the folders you browsed.
You can also detect faces on an image by image basis in View mode. Face Detection will scan each image for faces as you open it.
After Face Detection has run on the folders you have browsed, you can open the images in View mode, where the faces will be outlined. You can assign names to the detected faces in View mode.
To Enable or Disable Face Detection:
Choose Tools | Options | Face Detection and toggle the Automatically detect faces in images checkbox.
Once you have assigned names to detected faces in View mode, you can use the People group of the Catalog pane to find photos based on the individuals in them. You can also search by name in the Quick Search bar and the Search pane. You can manage the names assigned to faces through Face Detection using the People Manager.
To Remove Face Detection and Recognition on Selected Images:
You can remove face detection and recognition data on images selected in Manage mode.
These images will remain marked as having been scanned for faces, and Face Detection will not re-scan them, unless triggered by the Redetect Faces command, or enabling Rerun Face Detection and editing or developing the images and browsing them.
To Rerun Face Detection on Selected Images:
You can force Face Detection to re-scan selected images in Manage mode.
To Rerun Facial Recognition on Selected Images:
In order to correct names mistakenly assigned to faces by ACDSee, you can rerun facial recognition on faces you have not manually named within the selected image(s). This clears all names assigned by ACDSee's facial recognition, but leaves manually entered names. ACDSee will then attempt to recognize unnamed faces based on names you have entered manually.