OpenCV Compiles, but dosen't run! (I/O and Streams forum at Coderanch)

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import org.opencv.dnn.Dnn; import org.opencv.dnn.Net; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; import org.opencv.videoio.VideoCapture; public class AgeGenderRecognition { private static final String[] GENDER_LIST = {"Male", "Female"}; private static final String[] AGE_LIST = {"(0-2)", "(4-6)", "(8-12)", "(15-20)", "(25-32)", "(38-43)", "(48-53)", "(60-100)"}; private static final double[] MODEL_MEAN_VALUES = {78.4263377603, 87.7689143744, 114.895847746}; private static final double CONFIDENCE_THRESHOLD = 0.7; public static void main(String[] args) { // Load networks Net ageNet = Dnn.readNetFromCaffe("age_net.caffemodel", "age_deploy.prototxt"); Net genderNet = Dnn.readNetFromCaffe("gender_net.caffemodel", "gender_deploy.prototxt"); Net faceNet = Dnn.readNetFromTensorflow("opencv_face_detector_uint8.pb", "opencv_face_detector.pbtxt"); // Open a video file or an image file or a camera stream VideoCapture cap; if (args.length > 0) { cap = new VideoCapture(args[0]); } else { cap = new VideoCapture(0); while (true) { // Read frame Mat frame = new Mat(); cap.read(frame); // Get face bounding boxes Mat frameFace = frame.clone(); List bboxes = new ArrayList<>(); Size size = new Size(300,300); Scalar scalar = new Scalar(104, 117, 123); Mat blob = Dnn.blobFromImage(frameFace, 1.0, size, scalar, false, false); faceNet.setInput(blob); Mat detections = faceNet.forward(); for (int i = 0; i < detections.size().height; i++) { //double confidence = detections.get(0, 0, i, 2)[0]; double confidence; confidence = detections.get(i, 2)[0]; if (confidence > CONFIDENCE_THRESHOLD) { int x1 = (int) (detections.get(i, 3)[0] * frame.cols()); int y1 = (int) (detections.get(i, 4)[0] * frame.rows()); int x2 = (int) (detections.get(i, 5)[0] * frame.cols()); int y2 = (int) (detections.get(i, 6)[0] * frame.rows()); bboxes.add(new Rect(x1, y1, x2 - x1, y2 - y1)); Imgproc.rectangle(frameFace, new org.opencv.core.Point(x1, y1), new org.opencv.core.Point(x2, y2), new org.opencv.core.Scalar(0, 255, 0), (int) Math.round(frame.rows() / 150), 8, 0); if (bboxes.isEmpty()) { System.out.println("No face Detected, Checking next frame"); continue; for (Rect bbox : bboxes) { Mat face = new Mat(frame, bbox); Size sizeb = new Size(227,227); Scalar scalarb = new Scalar(MODEL_MEAN_VALUES); blob = Dnn.blobFromImage(face, 1.0, sizeb, scalarb, false); genderNet.setInput(blob); Mat genderPreds = genderNet.forward(); String gender = GENDER_LIST[(int) genderPreds.get(0, 0)[0]]; //System.out.println("Gender Output : " + genderPreds); System.out.println("Gender : " + gender + ", conf = " + genderPreds.get(0, 0)[0]); ageNet.setInput(blob); Mat agePreds = ageNet.forward(); agePreds = agePreds.reshape(1, 1); // reshape to 2D matrix with one row Point maxLoc = new Point(); Core.minMaxLoc(agePreds); int ageIdx = (int) maxLoc.x; Imgcodecs.imwrite("age-gender-out-"+args[0]+".jpg", frameFace); System.out.println("Age : " + AGE_LIST[ageIdx] + ", conf = " + agePreds.get(0, ageIdx)[0]); cap.release();

I get!

This is what chatGPT is saying about debugging the code, but it's not helpful...

The error message "java.lang.UnsatisfiedLinkError: 'long org.opencv.dnn.Dnn.readNetFromCaffe_0(java.lang.String, java.lang.String)'" suggests that the program is trying to call a native method that could not be found.

This error is caused by an issue with the native libraries of OpenCV.

The most common causes of this error are:

OpenCV library files are not present in the classpath.
OpenCV library files are not compatible with the version of Java you are using.
The OpenCV native library files (e.g. opencv_javaXXX.dll, libopencv_javaXXX.so) are not in the PATH.
You are using a 32-bit version of Java with a 64-bit version of the OpenCV native libraries or vice versa.

To solve this error, you should check that you have the correct version of OpenCV and its Java bindings installed, and that they are included in the classpath of your project.
Also, you should check that the native libraries of OpenCV are in the PATH or in the directory of your project.
You should also make sure that you are using the correct version of Java and that it is compatible with the version of OpenCV you are using.

Please check the following:

Make sure you have the correct version of OpenCV for your platform
Make sure the opencv jar is in your classpath
Make sure the native library (dll or so) is in your PATH or in the working directory of your program
Make sure the java version you are using is compatible with the openCV version you are using.

Please let me know if you have further questions or issues.

My openCV path is: C:\opencv\build\java\opencv-460.jar

The class path is correct in netbeans, as I checked this:
Right-click on your project in the Project pane and select Properties.
Select Libraries from the left sidebar.
Click on the Add JAR/Folder button and navigate to the location of the opencv-xxx.jar file.
Click on the Open button.
Click on the OK button.

The OpenCV native library files (e.g. opencv_javaXXX.dll, libopencv_javaXXX.so) are not in the PATH.
Make sure the native library (dll or so) is in your PATH or in the working directory of your program

Have you checked that any dll are in the correct locations?

Ok I sorted part of the erros, being the unstisfied link, but it still won't load the models.

run:
OpenCV(4.7.0-dev) Error: Unspecified error (FAILED: fs.is_open(). Can't open "age_net.caffemodel") in cv::dnn::ReadProtoFromTextFile, file C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\modules\dnn\src\caffe\caffe_io.cpp, line 1126
Exception in thread "main" CvException [org.opencv.core.CvException: cv::Exception: OpenCV(4.7.0-dev) C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\modules\dnn\src\caffe\caffe_io.cpp:1126: error: (-2:Unspecified error) FAILED: fs.is_open(). Can't open "age_net.caffemodel" in function 'cv::dnn::ReadProtoFromTextFile'
	at org.opencv.dnn.Dnn.readNetFromCaffe_0(Native Method)
	at org.opencv.dnn.Dnn.readNetFromCaffe(Dnn.java:130)
	at AgeGenderCV.AgeGenderCV.ProcessImage(AgeGenderCV.java:27)
	at AgeGenderCV.AgeGenderCV.run(AgeGenderCV.java:110)
	at AgeGenderCV.AgeGenderCV.main(AgeGenderCV.java:133)
C:\Users\cam30\AppData\Local\NetBeans\Cache\16\executor-snippets\run.xml:111: The following error occurred while executing this line:
C:\Users\cam30\AppData\Local\NetBeans\Cache\16\executor-snippets\run.xml:68: Java returned: 1
BUILD FAILED (total time: 0 seconds)
<div class="clear"/><div class="postText ">I then tried changing the working directory to that of my project with the model files in and got this:
<br/> 
<br/> <textarea name="code" class="java" cols="60" rows="10">run:
[libprotobuf ERROR C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\3rdparty\protobuf\src\google\protobuf\text_format.cc:335] Error parsing text-format opencv_caffe.NetParameter: 2:1: Invalid control characters encountered in text.
[libprotobuf ERROR C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\3rdparty\protobuf\src\google\protobuf\text_format.cc:335] Error parsing text-format opencv_caffe.NetParameter: 2:10: Invalid control characters encountered in text.
[libprotobuf ERROR C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\3rdparty\protobuf\src\google\protobuf\text_format.cc:335] Error parsing text-format opencv_caffe.NetParameter: 2:11: Interpreting non ascii codepoint 174.
[libprotobuf ERROR C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\3rdparty\protobuf\src\google\protobuf\text_format.cc:335] Error parsing text-format opencv_caffe.NetParameter: 2:11: Expected "{", found "�".
OpenCV(4.7.0-dev) Error: Unspecified error (FAILED: ReadProtoFromTextFile(param_file, param). Failed to parse NetParameter file: age_net.caffemodel) in cv::dnn::ReadNetParamsFromTextFileOrDie, file C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\modules\dnn\src\caffe\caffe_io.cpp, line 1162
Exception in thread "main" CvException [org.opencv.core.CvException: cv::Exception: OpenCV(4.7.0-dev) C:\GHA-OCV-2\_work\ci-gha-workflow\ci-gha-workflow\opencv\modules\dnn\src\caffe\caffe_io.cpp:1162: error: (-2:Unspecified error) FAILED: ReadProtoFromTextFile(param_file, param). Failed to parse NetParameter file: age_net.caffemodel in function 'cv::dnn::ReadNetParamsFromTextFileOrDie'
	at org.opencv.dnn.Dnn.readNetFromCaffe_0(Native Method)
	at org.opencv.dnn.Dnn.readNetFromCaffe(Dnn.java:130)
	at AgeGenderCV.AgeGenderCV.ProcessImage(AgeGenderCV.java:27)
	at AgeGenderCV.AgeGenderCV.run(AgeGenderCV.java:110)
	at AgeGenderCV.AgeGenderCV.main(AgeGenderCV.java:133)
C:\Users\cam30\AppData\Local\NetBeans\Cache\16\executor-snippets\run.xml:111: The following error occurred while executing this line:
C:\Users\cam30\AppData\Local\NetBeans\Cache\16\executor-snippets\run.xml:68: Java returned: 1
BUILD FAILED (total time: 0 seconds)
<div class="clear"/><div class="postText ">It seems like the library didn't like your model file.<textarea name="code" class="text" cols="60" rows="10">Invalid control characters encountered in text.
Error parsing text-format opencv_caffe.NetParameter: 2:11: Interpreting non ascii codepoint 174.
Error parsing text-format opencv_caffe.NetParameter: 2:11: Expected "{", found "�".

It found a ® character where it was expecting a { character.

Some code fom a old project of mine, that was in opencv2.4.x

Anyway It didn't take much to get past that error and getting a new one!

Once I get it acceepting the DNN I'm going to sort out adding arguments, as I have some nice code for that (once I can get it to run)!

public void run(){
        // Read the image passed by parameter
        Mat image_entry = Imgcodecs.imread("c:/test/image_entry.jpg");
        //image_entry = Imgcodecs.imread(args[1]);
        // Checks if the image has loaded correctly
        if (image_entry.empty())
            System.out.print("> Error loading input image");
            System.out.print("\n");
            System.exit(1);
        ProcessImage();
    public static void main(String args[])
        //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
            System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
            if (System.getProperty("os.arch").equals("amd64") || System.getProperty("os.arch").equals("x86_64")) //NON-NLS
                System.loadLibrary("opencv_java470"); //NON-NLS
            } else
                System.loadLibrary("opencv_java470"); //NON-NLS
        } catch (UnsatisfiedLinkError e)
            System.out.println("Error: "+e.getMessage());
        AgeGenderCV example = new AgeGenderCV();
        example.run();
<div class="clear"/><div class="postText ">Ok Here is my code now I'm having an assertion error, with the vector subscript being out of range.
<br/> 
<br/> I have however fixed the libaries opening and the models not working.
<br/> 
<br/> <textarea name="code" class="java" cols="60" rows="10">
package AgeGenderCV;
import java.util.ArrayList;
import java.util.List;
import org.opencv.core.Core;
import org.opencv.core.Point;
import org.opencv.core.Mat;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.dnn.Dnn;
import org.opencv.dnn.Net;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.opencv.videoio.VideoCapture;
public class AgeGenderCV {
    private static final String[] GENDER_LIST = {"Male", "Female"};
    private static final String[] AGE_LIST = {"(0-2)", "(4-6)", "(8-12)", "(15-20)", "(25-32)", "(38-43)", "(48-53)", "(60-100)"};
    private static final double[] MODEL_MEAN_VALUES = {78.4263377603, 87.7689143744, 114.895847746};
    private static final double CONFIDENCE_THRESHOLD = 0.7;
    public void ProcessImage(){
        // Load networks
        Net ageNet = Dnn.readNetFromCaffe("age_deploy.prototxt", "age_net.caffemodel");
        Net genderNet = Dnn.readNetFromCaffe("gender_deploy.prototxt", "gender_net.caffemodel");
        Net faceNet = Dnn.readNetFromTensorflow("opencv_face_detector_uint8.pb", "opencv_face_detector.pbtxt");
        // Open a video file or an image file or a camera stream
        VideoCapture cap;
        //if (args.length > 0) {
        //    cap = new VideoCapture(args[0]);
        //} else {
            cap = new VideoCapture(0);
        while (true) {
            // Read frame
            Mat frame = new Mat();
            cap.read(frame);
            // Get face bounding boxes
            Mat frameFace = frame.clone();
            List<Rect> bboxes = new ArrayList<>();
            Size size = new Size(300,300);
            Scalar scalar = new Scalar(104, 117, 123);
            Mat blob = Dnn.blobFromImage(frameFace, 1.0, size, scalar, false, false);
            faceNet.setInput(blob);
            Mat detections = faceNet.forward();
            for (int i = 0; i < detections.size().height; i++) {
            //double confidence = detections.get(0, 0, i, 2)[0];
                double confidence;
                confidence = detections.get(i, 2)[0];
                if (confidence > CONFIDENCE_THRESHOLD) {
                    int x1 = (int) (detections.get(i, 3)[0] * frame.cols());
                    int y1 = (int) (detections.get(i, 4)[0] * frame.rows());
                    int x2 = (int) (detections.get(i, 5)[0] * frame.cols());
                    int y2 = (int) (detections.get(i, 6)[0] * frame.rows());
                    bboxes.add(new Rect(x1, y1, x2 - x1, y2 - y1));
                    Imgproc.rectangle(frameFace, new org.opencv.core.Point(x1, y1), new org.opencv.core.Point(x2, y2), new org.opencv.core.Scalar(0, 255, 0), (int) Math.round(frame.rows() / 150), 8, 0);
        if (bboxes.isEmpty()) {
            System.out.println("No face Detected, Checking next frame");
            continue;
        for (Rect bbox : bboxes) {
            Mat face = new Mat(frame, bbox);
            Size sizeb = new Size(227,227);
            Scalar scalarb = new Scalar(MODEL_MEAN_VALUES);
            blob = Dnn.blobFromImage(face, 1.0, sizeb, scalarb, false);
            genderNet.setInput(blob);
            Mat genderPreds = genderNet.forward();
            String gender = GENDER_LIST[(int) genderPreds.get(0, 0)[0]];
            //System.out.println("Gender Output : " + genderPreds);
            System.out.println("Gender : " + gender + ", conf = " + genderPreds.get(0, 0)[0]);
            ageNet.setInput(blob);
            Mat agePreds = ageNet.forward();
            agePreds = agePreds.reshape(1, 1); // reshape to 2D matrix with one row
            Point maxLoc = new Point();
            Core.minMaxLoc(agePreds);
            int ageIdx = (int) maxLoc.x;
            //Imgcodecs.imwrite("age-gender-out-"+args[0]+".jpg", frameFace);
            Imgcodecs.imwrite("age-gender-out-.jpg", frameFace);
            System.out.println("Age : " + AGE_LIST[ageIdx] + ", conf = " + agePreds.get(0, ageIdx)[0]);
        cap.release();
        public void run(){
        // Read the image passed by parameter
        Mat image_entry = Imgcodecs.imread("c:/test/image_entry.jpg");
        //image_entry = Imgcodecs.imread(args[1]);
        // Checks if the image has loaded correctly
        if (image_entry.empty())
            System.out.print("> Error loading input image");
            System.out.print("\n");
            System.exit(1);
        ProcessImage();
    public static void main(String args[])
        //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
            System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
            if (System.getProperty("os.arch").equals("amd64") || System.getProperty("os.arch").equals("x86_64")) //NON-NLS
                System.loadLibrary("opencv_java470"); //NON-NLS
            } else
                System.loadLibrary("opencv_java470"); //NON-NLS
        } catch (UnsatisfiedLinkError e)
            System.out.println("Error: "+e.getMessage());
        AgeGenderCV example = new AgeGenderCV();
        example.run();
Attempting to upgrade input file specified using deprecated V1LayerParameter: age_deploy.prototxt
Successfully upgraded file specified using deprecated V1LayerParameter
Attempting to upgrade input file specified using deprecated V1LayerParameter: age_net.caffemodel
Successfully upgraded file specified using deprecated V1LayerParameter
Attempting to upgrade input file specified using deprecated V1LayerParameter: gender_deploy.prototxt
Successfully upgraded file specified using deprecated V1LayerParameter
Attempting to upgrade input file specified using deprecated V1LayerParameter: gender_net.caffemodel
Successfully upgraded file specified using deprecated V1LayerParameter
C:\Users\cam30\AppData\Local\NetBeans\Cache\16\executor-snippets\run.xml:111: The following error occurred while executing this line:
C:\Users\cam30\AppData\Local\NetBeans\Cache\16\executor-snippets\run.xml:94: Java returned: -2147483645
BUILD FAILED (total time: 18 seconds)
<div class="clear"/><div class="postText ">Here is the error I'm getting, I've never seen netbeans or a java project do this.</div><div class="posttext-attachmentseparator"/>
<div>run.jpg</div>
<div class="caption">Error</div>
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