How can I count number of people in java opencv

Question

1.00/5 (1 vote)

See more:

I want to make library that show as how many people are using it so i think i should count the number of user by detecting their face through java openCv. I want to count number of people in the image, using that library.

What I have tried:

am using the defult OPenCV FACE detecthion but how can i count it

Posted 20-May-17 22:48pm

Member 13213435

Updated 20-May-17 23:28pm

Afzaal Ahmad Zeeshan

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Afzaal Ahmad Zeeshan · Answer 1 · 2017-05-20T23:28:00

OpenCV returns the rectangles for the faces, and the areas that those "detected" faces cover. If I had to write the program that shows how many faces are there (people have faces, or faces are attached to the people), I would have simply counted the number of faces returned.

For example, the following code shows a sample of what needs to be done; I modified it to fit your need,

Java

// Detects the faces
this.faceCascade.detectMultiScale(grayFrame, faces, 1.1, 
                                  2, 0 | Objdetect.CASCADE_SCALE_IMAGE, 
                                  new Size(this.absoluteFaceSize, 
                                  this.absoluteFaceSize), new Size());

Rect[] facesArray = faces.toArray(); // Converts the faces to array
int people = facesArray.length;      // Number of people

Face Detection and Tracking — OpenCV Java Tutorials 1.0 documentation[^]

The code sample can be captured from GitHub, GitHub - opencv-java/face-detection: Face detection with OpenCV and JavaFX[^]