watson visual recognition error 400: cannot execute learning task: no classifier name given

2
votes

I was about to create a new classifier and train the visual recognition with pictures, but I got this error code which is stated in title when I curl following command

curl -u "0xxxxxxxxxxx":"vxxxxxxxxxxxxxx" \
 -X POST \
 -F "[email protected]" \
 -F "[email protected]" \
 -F "name=plasticbottle" \
 -k "https://gateway.watsonplatform.net/visual-recognition-beta/api/v2/classifiers?version=2015-12-02"
2
ibm-cloudibm-watsonvisual-recognition

2 Answers

1
votes

To set the classifiers you want to use you have to send a JSON containing something like:

{"classifier_ids": ["ClassifierName"]}

So your curl should be something like:

curl -u "username":"pwd"  \
-X POST \
-F "[email protected]" \
-F "classifier_ids={\"classifier_ids\":[\"ClassifierName\"]}"
"https://gateway.watsonplatform.net/visual-recognition-beta/api/v2/classify?version=2015-12-02"
1
votes

I'm not sure what was the problem using V2 api, but now, using V3 API your CURL should look like this example

curl -X POST
-F "[email protected]"
-F "[email protected]"
-F "orange_positive_example=@pos_ex.zip"
-F "[email protected]"
-F "name=fruit"
"https://gateway-a.watsonplatform.net/visual-recognition/api/v3/classifiers?api_key={api-key}&version=2016-05-20"

So your CURL for bottle should be like

curl -X POST
 -F "[email protected]"
 -F "[email protected]"
 -F "name=plasticbottle"
 "https://gateway-a.watsonplatform.net/visual-recognition/api/v3/classifiers?api_key={api-key}&version=2016-05-20"

Note that you now should use an api_key to authenticate and no longer a user/pass

This is documented in the v3 doc: https://www.ibm.com/watson/developercloud/visual-recognition/api/v3/#create_a_classifier