Issue in code of face recognition

[Anurag1201]

i have followed your instructions in the given video but still it is giving error in Core.Nativelibrary

[ruturp]

I have followed your instruction in given video but still it is giving error is below:
import org.opencv.highgui.Highgui;
import org.opencv.highgui.VideoCapture; this two package is exsist.
and Core.rectangle(frame, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height),
cannot find rectangle symbol

[tahaemara]

in opencv3.0, there is no highgui module in java.
To migrating from OpenCV 2.x to 3.0.0 (Java)

Highgui.imread(fileName, Highgui.CV_LOAD_IMAGE_GRAYSCALE) becomes Imgcodecs.imread(fileName, Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE)

And Highgui.imread(fileName) becomes Imgcodecs.imread(fileName)

also , drawing functions such as:

Core.circle(..), Core.line(..) become Imgproc.circle(..), Imgproc.line(..)
Core.rectangle(frame, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height) becomes Imgproc.rectangle(frame, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height);

[catapulveda]

Hi, Taha! You should publish the facial recognition source code in java. Thank you.

[alciomarhollanda]

Hi,

In openCV 3.2 don't work Imgcodecs.imread(".bmp", frame, mem);

[Ayush0601]

if (webSource.grab()) {

        System.out.println("err");                     

try
{

                      webSource = new VideoCapture(0);  
                      webSource.retrieve(frame);

                       Graphics g = jPanel1.getGraphics();

                        faceDetector.detectMultiScale(frame, faceDetections);

                        for (Rect rect : faceDetections.toArray())

{

                            Imgproc.rectangle(frame, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height),   new Scalar(0, 255,0));

error in this part of code

[tahaemara]

Post the error message here, so, I can check it.

[tahaemara]

@alciomarhollanda
Keep in mind that function Imgcodecs.imread takes a parameter represent the path of the image
Mat image = Imgcodecs.imread(getClass().getResource("/lena.png").getPath());

[livingstone90]

I am facing this error

OpenCV Error: Assertion failed (!empty()) in cv::CascadeClassifier::detectMultiScale, file C:\build\master_winpack-bindings-win64-vc14-static\opencv\modules\objdetect\src\cascadedetect.cpp, line 1698
Error

[tahaemara]

@livingstone90
Try to use the absolute path to the cascade file, in other words, try to replace this line
CascadeClassifier faceDetector = new CascadeClassifier(FaceDetection.class.getResource("haarcascade_frontalface_alt.xml").getPath().substring(1));
with
CascadeClassifier faceDetector = new CascadeClassifier("/path/to/haarcascade_frontalface_alt.xml");

[livingstone90]

Hi,How can i reduce the size frame of the video capture section..I dont want it to be long from left to right but I want it to align only on left side

[tahaemara]

@livingstone90 use these lines to change the size of the frames
capture.set(Highgui.CV_CAP_PROP_FRAME_WIDTH, WIDTH); capture.set(Highgui.CV_CAP_PROP_FRAME_HEIGHT, HEIGHT);

[jimiking]

hi taha.
i want make java app similar your app.
capture (webcam and ip camera) thin detect face with name .
please
please
please
please

[tahaemara]

@jimiking search google about "eigenfaces algorithm with java" you will see a lot of results.