使用 OpenCV 在 Java 中加载并行处理模块时出错

Question

I am trying to detect faces in an image using the OpenCV library in Java. I am using version 4.7.0-dev of OpenCV. When I run the program, I get the following error:

[ INFO:0@0.885] global registry_parallel.impl.hpp:96 cv::parallel::ParallelBackendRegistry::ParallelBackendRegistry core(parallel): Enabled backends(3, sorted by priority): ONETBB(1000); TBB(990); OPENMP(980)
[ INFO:0@0.885] global plugin_loader.impl.hpp:67 cv::plugin::impl::DynamicLib::libraryLoad load C:\Users\ricar\OneDrive\Documentos\libraries\opencv\build\java\x64\opencv_core_parallel_onetbb470_64d.dll => FAILED
[ INFO:0@0.886] global plugin_loader.impl.hpp:67 cv::plugin::impl::DynamicLib::libraryLoad load opencv_core_parallel_onetbb470_64d.dll => FAILED
[ INFO:0@0.886] global plugin_loader.impl.hpp:67 cv::plugin::impl::DynamicLib::libraryLoad load C:\Users\ricar\OneDrive\Documentos\libraries\opencv\build\java\x64\opencv_core_parallel_tbb470_64d.dll => FAILED
[ INFO:0@0.886] global plugin_loader.impl.hpp:67 cv::plugin::impl::DynamicLib::libraryLoad load opencv_core_parallel_tbb470_64d.dll => FAILED
[ INFO:0@0.887] global plugin_loader.impl.hpp:67 cv::plugin::impl::DynamicLib::libraryLoad load C:\Users\ricar\OneDrive\Documentos\libraries\opencv\build\java\x64\opencv_core_parallel_openmp470_64d.dll => FAILED
[ INFO:0@0.887] global plugin_loader.impl.hpp:67 cv::plugin::impl::DynamicLib::libraryLoad load opencv_core_parallel_openmp470_64d.dll => FAILED
[ INFO:0@1.067] global ocl.cpp:1186 cv::ocl::haveOpenCL Initialize OpenCL runtime...
[ INFO:0@1.977] global ocl.cpp:1192 cv::ocl::haveOpenCL OpenCL: found 2 platforms
[ INFO:0@1.977] global ocl.cpp:984 cv::ocl::OpenCLExecutionContext::Impl::getInitializedExecutionContext OpenCL: initializing thread execution context
[ INFO:0@1.977] global ocl.cpp:994 cv::ocl::OpenCLExecutionContext::Impl::getInitializedExecutionContext OpenCL: creating new execution context...
[ INFO:0@2.571] global ocl.cpp:1012 cv::ocl::OpenCLExecutionContext::Impl::getInitializedExecutionContext OpenCL: device=NVIDIA GeForce MX230
[ INFO:0@2.571] global ocl.cpp:5370 cv::ocl::Context::Impl::__init_buffer_pools OpenCL: Initializing buffer pool for context@0 with max capacity: poolSize=0 poolSizeHostPtr=0

This is my code. I believe that my problem is an installation or configuration issue.

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.opencv.objdetect.CascadeClassifier;

class Main{

    public static void main(String[] args){
        
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        
        Mat image = Imgcodecs.imread("C:\\Users\\ricar\\Downloads\\DSC02281.JPG");
        
        CascadeClassifier classifier = new CascadeClassifier("C:\\Users\\ricar\\OneDrive\\Documentos\\workspace\\LearningJava\\src\\haarcascade_frontalface_default.xml");
        MatOfRect faceDetections = new MatOfRect();
        classifier.detectMultiScale(image, faceDetections);
        
        for(Rect rect : faceDetections.toArray()) {
            
            Imgproc.rectangle(image, rect, new Scalar(0, 0, 255));
            
        }
        Imgcodecs.imwrite("C:\\Users\\ricar\\Downloads\\output.jpg", image);
        
    }
    
}

Answer 1

The error message suggests that the problem lies with the OpenCV parallel plugins. This could be due to a missing or incompatible version of the TBB library, which OpenCV uses for parallel processing.

You should check if you have the correct version of TBB installed and that it is located in a directory that is included in your system's PATH environment variable.