feat: frigate matches below an area target

README.md

@@ -337,6 +337,11 @@ frigate:
   # stop the processing loop if a match is found
   # if set to false all image attempts will be processed before determining the best match
   stop_on_match: true
+  
+  # ignore detected areas so small that face recognition would be difficult
+  # quadrupling the min_area of the detector is a good start
+  # does not apply to MQTT events
+  min_area: 0
 
   # object labels that are allowed for facial recognition
   labels:

api/src/constants/config.js

@@ -134,6 +134,7 @@ module.exports.frigate = ({ id, camera, topic }) => {
     attempts,
     image,
     stop_on_match: stopOnMatch,
+    min_area: minArea,
   } = JSON.parse(JSON.stringify(CONFIG.frigate));
   const { masks } = module.exports;
 
@@ -152,5 +153,6 @@ module.exports.frigate = ({ id, camera, topic }) => {
     url: { frigate: url, snapshot, latest },
     attempts,
     stop_on_match: stopOnMatch,
+    min_area: minArea,
   });
 };

api/src/constants/defaults.js

@@ -27,6 +27,7 @@ module.exports = {
     labels: ['person'],
     update_sub_labels: false,
     stop_on_match: true,
+    min_area: 0,
   },
   mqtt: {
     topics: {

api/src/controllers/recognize.controller.js

@@ -58,8 +58,8 @@ module.exports.start = async (req, res) => {
     if (event.type === 'frigate') {
       const { type: frigateEventType, topic } = req.body;
       const attributes = req.body.after ? req.body.after : req.body.before;
-      const { id, label, camera, current_zones: zones } = attributes;
-      event = { id, label, camera, zones, frigateEventType, topic, ...event };
+      const { id, label, camera, area, current_zones: zones } = attributes;
+      event = { id, label, camera, area, zones, frigateEventType, topic, ...event };
     } else {
       const { url, camera } = req.query;
 

api/src/util/frigate.util.js

@@ -22,6 +22,7 @@ module.exports.checks = async ({
   topic,
   label,
   camera,
+  area,
   zones,
   PROCESSING,
   IDS,
@@ -63,6 +64,10 @@ module.exports.checks = async ({
       return `${id} - ${label} label not in (${FRIGATE.LABELS.join(', ')})`;
     }
 
+    if (FRIGATE.MIN_AREA > area) {
+      return `skipping object area smaller than ${FRIGATE.MIN_AREA} (${area})`;
+    }
+
     if (IDS.includes(id)) {
       return `already processed ${id}`;
     }