face recognition with webcam about face-recognition.js

[erenaud3]

Hi @MohannadBakkar !

If you simply want a small help, this is the approach I used :

• use opencv4nodejs to get a cv.rect that give you the position of a detected face in your webcam's frame
• enlarge this rect (it will be too small for face recognition otherwise).
• get a cropped image of your frame (to make recognition faster). Something like:

_croppedImage = _frame.getRegion(_enlargedRect);

# (you may need to add .resize(width, height)

• convert your image "from opencv4nodejs to face-recognition"

_frFaceImg = fr.cvImageToImageRGB(fr.CvImage(_croppedImage));

• recognize face

_faceResults = FaceRecognizer.predictBest(_frFaceImg);

As @justadudewhohacks pointed out in README, you could alternatively use face-api.js, which is newer, faster and more browser-friendly (but probably less "back-end friendly").

[erenaud3]

You welcome !

About face-api.js, I think you should consider give it a try. You will see it is really more efficient.
Even if it's clearly front-end oriented (at least when you look at example), you can also use it in back-end using tensors (from tensorflow).

You can find the code I used here to perform face detection on a webcam feed. (using opencv4nodejs to get webcam frames). You could easily add face recognition. Just do not forget to dispose your tensor, like I did !

[MohannadBakkar]

@erenaud3 Thank you for your help.

also, I am actually not using any kind of front end, it's only back-end, that's why I didn't choose face-api.js.

[MohannadBakkar]

What do you mean dispose of the tensor?

Now I'm facing a lot of lagging when I run the face recognizer on the webcam, I have 16 GB of ram btw.