Node-Red+OpenCvで顔認識

###前提・実現したいこと
https://qiita.com/zuhito/items/ead9579a8676cb930556　このページを参考にnode-redでOpenCVノードを使って顔を認識したらRaspberryPiのGPIOにつないだサーボモータを動かすものを作っています。
node-redにてOpenCvでな機能を実装中に以下のエラーメッセージが発生しました。

###発生している問題・エラーメッセージ

Error: /build/opencv-U1UwfN/opencv-2.4.9.1+dfsg1/modules/core/src/array.cpp:2482: error: (-206) Unrecognized or unsupported array type in function cvGetMat

###該当のソースコード（node-redフロー）

[{"id":"bad7df11.d4849","type":"tjbot-wave","z":"5c37695.9db9898","botId":"3d8dec20.5048b4","motion":"wave","name":"","x":570,"y":160,"wires":[]},{"id":"a9ea1147.86387","type":"switch","z":"5c37695.9db9898","name":"","property":"payload.0","propertyType":"msg","rules":[{"t":"nnull"}],"checkall":"true","outputs":1,"x":450,"y":160,"wires":[["bad7df11.d4849"]]},{"id":"2c15dd9e.b62742","type":"opencv","z":"5c37695.9db9898","detect":"FACE_CASCADE","output":"json","name":"","x":300,"y":160,"wires":[["a9ea1147.86387","b143102b.fcab7"]]},{"id":"b143102b.fcab7","type":"camerapi-takephoto","z":"5c37695.9db9898","filemode":"0","filename":"","filedefpath":"1","filepath":"","fileformat":"jpeg","resolution":"1","rotation":"0","fliph":"0","flipv":"0","brightness":"50","contrast":"0","sharpness":"0","imageeffect":"none","name":"","x":350,"y":60,"wires":[["2c15dd9e.b62742"]]},{"id":"aef3dd74.6f4c5","type":"inject","z":"5c37695.9db9898","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":true,"x":130,"y":60,"wires":[["b143102b.fcab7"]]},{"id":"3d8dec20.5048b4","type":"tjbot-config","z":"","name":"","hasServo":true,"hasLED":true,"hasSpeaker":true,"hasMicrophone":true,"hasCamera":true,"speakerDeviceId":"plughw:0,0"}]

###試したこと
google検索しましたが意味不明

###補足情報(言語/FW/ツール等のバージョンなど)
$ npm -v
3.10.10