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compare two faces opencv node js

asked 2018-12-17 05:57:20 -0600

e1bit gravatar image

Good Morning.

I have an application in Nodejs with opencv that identifies a face, and saves the img of the face in a file.

My question:

I would like to save only once the identified face, as it is analyzing in real time a video, and saving the face, it is reprinting the image several times. Do you have any method to treat this problem? Save only one image of the identified face?

I thought of comparing the current face with the previous face, if different saves the image. But I did not find an "easy" method to do.

Sorry for my bad english, and thank you for your help. Thank you

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that identifies a face,

that means: detects a face ? (identification would be: "who is it ?")

berak gravatar imageberak ( 2018-12-17 06:05:10 -0600 )edit

Only detect, I do not need to know who it is.

e1bit gravatar imagee1bit ( 2018-12-17 06:07:17 -0600 )edit

I already have and saved my face, already saving several pictures of the same face. The face image is being filmed.

e1bit gravatar imagee1bit ( 2018-12-17 06:08:48 -0600 )edit

Currently it works like this: I compare the current face with the face of the previous frame, if it is different I save, if it is the same I will discarto the image, I use the lib (image-diff). But this is not efficient, I would like to evolve this. I am open to suggestions.

e1bit gravatar imagee1bit ( 2018-12-18 04:58:09 -0600 )edit

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answered 2018-12-17 06:12:47 -0600

berak gravatar image

updated 2018-12-17 06:37:57 -0600

assuming, you're using opencv.js (we cannot help you with native node bindings), maybe a simple cv.resize() / cv.absdiff() / cv.sum() will already do the job,

however, there is a decent cnn based method here , have a look

(it probably already does everything you wanted)

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I currently use cv.resize (). The cv.absdiff () method I do not know. I'm using the opencv4nodejs library. I'll read about the cnn-based method. tks

e1bit gravatar imagee1bit ( 2018-12-17 06:18:28 -0600 )edit

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Asked: 2018-12-17 05:57:20 -0600

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Last updated: Dec 17 '18