Configure Face Monitoring. Dossier Database
This chapter is all about configuring face monitoring and creating the dossier database. Each dossier must contain one or several photos of a person and belong to a specific classification list (watch list), for example, wanted, VIP, etc. You can create as many watch lists as necessary.
Tip
To create dossiers in bulk, use the batch photo upload functionality.
In this section:
Monitoring Unmatched Faces
FindFace features one pre-configured watch list that is used for monitoring only unmatched faces. This watch list cannot be removed from the system. To edit its settings or deactivate it, navigate to the Preferences tab. Click Watch Lists and then click Unmatched in the table.
Note
To view only unmatched faces in the event list, select Unmatched in the Watch lists filter on the Events tab (refer to Work with Events for details).
Create Watch List
To create a custom watch list, do the following:
Tip
Besides the Unmatched watch list, there is also a default preconfigured watch list to monitor matched faces. This watch list cannot be removed from the system.
Navigate to the Preferences tab. Click Watch Lists.
Click +.
From the Label palette, select a color which will be shown in notifications for this list. Keep in mind that the right color makes for a quicker response of the person on duty.
Specify the watch list name. Add a comment if needed.
Select a camera group(s) that will be used to monitor the watch list. If no groups specified, the watch list will be monitored by all active cameras in the system.
Check Require acknowledgment if it is mandatory that events associated with the list be manually acknowledged.
Check Enable sound alert to turn on sound notifications for the list if needed.
By default, all watch lists in the system are applied the generic confidence threshold. To set an individual threshold for the watch list, check Confidence Threshold and specify the threshold value.
Important
The default generic confidence threshold is optimal for the majority of recognition cases. We do not recommend changing it on your own. Be sure to consult with our technical experts by support@ntechlab.com.
Check Active.
Click Save.
On the Permissions tab, assign privileges on the watch list, specifying which user roles are allowed to change/view the watch list settings.
Click Save.
Create Dossier Manually
To create a dossier manually, do the following:
Navigate to the Dossiers tab.
Click +.
Attach a photo, related documents, and specify the person’s name. If necessary, add a comment.
Important
A face in the photo must be of high quality, i.e. close to a frontal position. Distance between pupils: 60 px. Supported formats: WEBP, JPG, BMP, PNG. Photos that do not meet the requirements will be rejected with a detailed error description.
From the Watch lists drop-down menu, select a classification list (or several lists, one by one) for the dossier.
Check Active. If a dossier is inactive, it is excluded from the real time face identification.
Click Save. If a similar dossier already exists in the database, you will be able to merge it with the new one, create the new dossier anyway, or cancel creation.
Batch Photo Upload
To create dossiers in bulk, use the batch photo upload. Do the following:
Tip
If you need to upload a large number of photos (more than 10,000), use Console Bulk Photo Upload.
Important
Faces in photos must be of high quality, i.e. close to a frontal position. Distance between pupils: 60 px. Supported formats: WEBP, JPG, BMP, PNG. Photos that do not meet the requirements will be rejected with a detailed error description.
Navigate to the Dossiers tab.
Click +.
Click Batch Dossier Upload.
Select multiple image files, or a folder.
You can use image file names as a basis for names and/or comments in dossiers to be created. Select the necessary option(s). Then configure the automatic name/comment generation rule by appending a custom prefix and/or postfix to the file name.
Tip
To avoid merging the 3 words into one, use underscore or another symbol in the prefix and postfix.
From the Watch lists drop-down menu, select a classification list for the dossiers.
Use the Parallel Upload option to specify the number of photo upload streams. The more streams you use, the faster it takes to complete the upload, however it requires more resources as well.
From the Group Photo drop-down menu, select the system behavior upon detecting several faces in a photo: reject the photo, upload the biggest face, or upload all faces.
Click Start to launch the photo upload.
Important
To view the batch photo upload log, click Logs. You can then download the log in the
.csvformat if needed.
Filter Dossiers by Watch List
You can find all dossiers created in FindFace on the Dossiers tab. Use the Watch lists filter to filter dossiers by list.
Purge Dossier Database
You can purge the entire dossier database in one click. To do so, navigate to the Preferences tab. Click Watch Lists. Click Delete All Dossiers.
Disable Event Creation for Specific Faces
Sometimes, it is necessary to omit certain faces during monitoring. One of the most common cases is the faces in advertisement media located in the camera field. Being detected continuously by your system, they can easily overflow the event feed and the database.
To prevent this from happening, do the following:
Create a watch list that will store the faces excluded from detection. In its settings, check Do not create face events.
For each excluded face, create a dossier and add it to the watch list.