Hi all - I'm trying to implement a facial recognition workflow that announces who has entered an area after image processing is applied via Facebox. I've gotten Facebox to work fine and see attribute object passed in the complete message payload, but can't for the life of me figure out how to actua…

Yes, but if you would like to match for the name as visible in the flow, the path would be msg.data.attributes.faces, which is an array of objects. A JSONata check to see if there’s an object in there matching with name “josiah” would likely be easiest.

{ "_msgid" : 56fc02d6.3693bc, "topic" : , "payload" : -{ "domain" : image_processing, "service" : scan, "data" : -{ "entity_id" : image_processing.facebox_office_camera } }, "data.attributes.matched_faces()" : 1, "data" : -{ "entity_id" : image_processing.facebox_office_camera, "state" : 1, "attribu…

Looking at the example msg you posted, the name of the property has parentheses on the end i.e. not a valid dot notation variable name so... To access that in pure js you would need to use object['name-of property ()'] to access it. Hopefully that gives you a clue

I'm feeling generous.... in a function node, try this... var mf = msg["data.attributes.matched_faces()"] msg.payload = mf; return msg; Attach a debug node BEFORE and AFTER the function node - see what comes through in payload.

Ah-ha, I think this was what I was missing... I ended up using a split node with data.attributes.matched_faces.name where the name was the trained face and one for empty (i.e. unrecognized or no faces detected). I prefer to use the matched_faces attribute over the faces attribute to account for an e…

Node-RED

Node-RED Forum

Help trying to extract object attribute

General

afelix 5 October 2019 17:53 2

Can you post a sample message that is going into that switch?

Topic		Replies	Views
How do I access property in nested object? General	18	1649	11 October 2021
Wild card or variable attribute in javascript object as payload? General	11	2478	6 July 2021
Show ALL attributes data General	6	2855	21 February 2019
Get Attributes of a given entity General	29	7819	3 February 2022
Extract object name and put it in a flow variable (help needed) General	3	3538	8 November 2018

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Help trying to extract object attribute

Related topics