quick add of default_{model|threshold} to settings, face_refimg_link now stores model_used and face_distance AND working implementation of own face_distance algorithm rather than compareAI(), removed older AI code it would no longer work with DB structures anyway, tweaked viewer to remove coords of unmatched faces for now

TODO

@@ -1,33 +1,24 @@
 ## GENERAL
 
-    * Face matching:
-        - upgrade to face distance per face per file
-            - so we dont get 2 x same face in one file, and if it could match say Cam and Mich for 1 face, take the higher match, not the first one to be over the threshold
-        - allow for threshold/settings to be tweaked from the GUI?
-            ---> at least settings for default value (back to 0.6 / 0.5?)
-            ---> with override table to do per file / per face?
-        - face locations:
-            START FORM SCRATCH so all images have face_locn data
-        - algo:
-            for each face (even known) in image
-                foreach refimg
-                    get face_distance
-            sort by face_distance
-            for each face
-                connect lowest score with that face (for this file)
-                this means this face is no longer 'free' for a match
-                if (sorted) face distance > 0.55 stop as no further 'matches'
-        - use cnn model (check ftst.py) for ref images, and potentially as a setting to check images without a face?
-        - or always?
-            -- would CUDA be useful here? (which is faster say an old 730 or the AMD cpu?)
+    * allow for and implement: default_refimg_model and default_scan_model
+        - cnn for refimgs should be defaul, for scan use hog
+        - research upsample val...
 
-    
+    * viewer needs to allow toggle to scan_model (and prob. right-click on file... AI (with CNN) AI (with hog)
+        - I think go to html5 toggles for: face, distance (only shows if you toggle face on), drop-down for model (allow change to cnn and reprocess)
+        - show matching face distance in viewer
+        - might be best for AI_Model to have friendly name (slow, slower) :)
+
+    * remove dirs after the duplicate cleanup removes all its content
+
+    * Face matching:
+        - upgrade to face distance per face per file [DONE]
+        - face locations:
+            START FORM SCRATCH for prod so all images have face_locn data
 
     * viewer:
         can we make it preload next/prev images, and only reload the image div when we jump?  to make arrow-based nav much faster
 
-    * remove dirs after the duplicate cleanup removes all its content
-
     * could look to remove the hand fixing of json.loads of array data --> seems you can make your own datatype in the ORM, and it can do the conversion every time you use it
         - https://stackoverflow.com/questions/28143557/sqlalchemy-convert-column-value-back-and-forth-between-internal-and-database-fo
 
@@ -52,22 +43,24 @@
     need a manual button to restart a job in the GUI, 
         (based on file-level optims, just run the job as new and it will optim over already done parts and continue)
 
-    Future:
-        Admin
-            -> reset face_flag
-
-        AI
-            -> rescan <dir> for <person> --> can do this on new image only
-            (optimised to only scan has_unidentified_face)... BUT if you change
-            thresholds on AI, or we get a new/better one some day, then it can
-            all images with faces, or if we 'reset face_flag' rescan all images
-
         Admin
             -> delete old jobs / auto delete jobs older than ???
             -> do I want to have admin roles/users?
 
+### AI
+    * faces per file (need a threshold for too many? OR
+    * consider size of bbox of face / 'high-quality' faces -- if face is too small in image, dont match it
+    * if we have a high-qual face, we could show this on a page and have UI to create ref img / person for it
+
 ### UI
     ??? ipads can't do selections and contextMenus, do I want to re-factor to cater for this?
+        - partial fix, double-click / tap allows viewing (most useful context-menu feature)
+
+    For AI / rescan:
+        way to override per file:
+            the model used
+            the threshold used?
+        maybe on the per file you could select an unknown face and add it as a ref img to a existing person, or make a new person and attach?
 
     file details is sort of crap - only works on import path
         - probably better to have a different 'view', e.g. folders/flat/detailed