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--- lirec:faceident_dev_log [2009-05-27 11:10] – created davegriffiths
+++ lirec:faceident_dev_log [2009-05-27 11:27] – davegriffiths
@@ Line 11: / Line 11: @@
 Also provide a test competency to try out reusable standard stuff for lirec (yarp, cross platform development, etc)
-====Initial version====
+====Initial version 0.1 [27th Feb 2009]====
   * Using squared sum of differences (SSD) to compare stored images with any faces found in the image.
-  * Two modes-
+  * Faces can be any size in the image, but are smoothly scaled into a standard resolution for comparison and storage
+  * Two modes of operation
 ===Calibration Mode===
-Look for all faces in the image, compare with stored faces and create a new identity if the difference is over a given threshold. Do this each from until switched into detect mode.
+Look for all faces in the image, compare with stored faces and create a new identity if the difference is over a given threshold. Do this each frame until switched into detect mode.
+  * Uses a maximum count of faces, in order to prevent storing too many false detections
 ===Detection Mode===
@@ Line 28: / Line 31: @@
 <html><embed src="http://blip.tv/play/Ae_LII_+Sw" type="application/x-shockwave-flash" width="360" height="303" allowscriptaccess="always" allowfullscreen="true"></embed></html>
-====Further refinements====
+====Thinking about usage [19th March 2009]====
+* Adding user inteface for recording up to 10 people by pressing the number keys
+* Better output - rendering the recorded faces, and draws lines between them and the detected faces.
+====YARP interface [20th March 2009]====
+Added a simple message to tell other programs which user is in view, with a confidence metric.
+^ /faceident user-id confidence-value ^
+The program still needs to be driven by user input, calibrating it by recording people at startup.
+====More YARP, and persistence for INESC-ID [15 April 2009]====
+New messages
+^ Input port    ^  Bottle contents  ^   Meaning ^
+| /faceident-ctrl | "train" ID    |      Train for this user |
+| /faceident-ctrl | "detect"       |     Switch out of training mode |
+| /faceident-ctrl | "save" sessionname |  Save the detected faces
+| /faceident-ctrl | "load" sessionname | Load previously detected faces
+| /faceident-ctrl | "clear"          |   Clears all faces |
+Loading and saving is done quickly, for the review - and just consists of saving images as png files and a quickly hacked together ascii format for mapping the images to the id numbers.
+Persistence across time via load and save to disk brings up problems - the computer vision will break when lighting changes too much, the saved faces will be too different from the visible ones. One possible workaround
+would be to lower the error threshold and sneakily recalibrate for the most likely user at the start of a new session.
+====