Question

Hy我正在尝试使用open cv的facedetection样本。第一个问题是在这里解决的：opencv-3-0-0-facedetect-sample-fails

我的代码现在看起来像这样：

package org.maxbit.opencv.samples;

import java.awt.image.ImageProducer;

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
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;

//
// Detects faces in an image, draws boxes around them, and writes the results
// to "faceDetection.png".
//
class DetectFaceDemo {
  public void run() {
    System.out.println("\nRunning DetectFaceDemo");

    // Create a face detector from the cascade file in the resources
    // directory.
    CascadeClassifier faceDetector = new CascadeClassifier();
//    System.out.println(getClass().getResource("libpcascade_frontalface.xml").getPath());
    if(!faceDetector.load("D:/lbpcascade_frontalface.xml"))
        System.out.println("ldpcascade_frontalface.xml not found!");
    System.out.println("Loading analyse method Done!");
    Mat image = Imgcodecs.imread("D:/lena.png");

    // Detect faces in the image.
    // MatOfRect is a special container class for Rect.
    MatOfRect faceDetections = new MatOfRect();
    faceDetector.detectMultiScale(image, faceDetections);

    System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));

    // Draw a bounding box around each face.
    for (Rect rect : faceDetections.toArray()) {
        Imgproc.rectangle(image, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height), new Scalar(255, 0, 0));
    }

    // Save the visualized detection.
    String filename = "faceDetection.png";
    System.out.println(String.format("Writing %s", filename));
    Imgcodecs.imwrite(filename, image);
  }
}

public class SampleB {
  public static void main(String[] args) {
    System.out.println("Hello, OpenCV "+Core.NATIVE_LIBRARY_NAME);

    // Load the native library.
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    new DetectFaceDemo().run();
  }
}

当我开始这个时，我得到以下的错误：

OpenCV Error: Assertion failed (clEnqueueReadBuffer(q, (cl_mem)u->handle, CL_TRUE, 0, u->size, alignedPtr.getAlignedPtr(), 0, 0, 0) == CL_SUCCESS) in cv::ocl::OpenCLAllocator::map, file ..\..\..\..\opencv\modules\core\src\ocl.cpp, line 3961
Exception in thread "main" CvException [org.opencv.core.CvException: cv::Exception: ..\..\..\..\opencv\modules\core\src\ocl.cpp:3961: error: (-215) clEnqueueReadBuffer(q, (cl_mem)u->handle, CL_TRUE, 0, u->size, alignedPtr.getAlignedPtr(), 0, 0, 0) == CL_SUCCESS in function cv::ocl::OpenCLAllocator::map
]
    at org.opencv.objdetect.CascadeClassifier.detectMultiScale_1(Native Method)
    at org.opencv.objdetect.CascadeClassifier.detectMultiScale(CascadeClassifier.java:176)
    at org.maxbit.opencv.samples.DetectFaceDemo.run(SampleB.java:35)
    at org.maxbit.opencv.samples.SampleB.main(SampleB.java:57)

指向此line of code

Answer 1

我知道这是一篇旧帖子，但我能够通过不同的方式设置文件路径来解决这个问题。我使用以下内容来修复文件路径，我只是将它添加到下一行并且它可以工作，当然代码应该清理得更好

faceDetector.load("C:\\workspace\\OpenCV_Starting\\bin\\main\\resources\\lbpcascade_frontalface.xml");

（当然C：\ Workspace \ stuff是我的电脑，所以要适当改变！）

打开CV 3.0.0人脸检测detectMultiScale失败

1 个答案: