Question

我正在java上使用opencv库来获取图像文件夹并仅裁剪面部的程序。它使用opencv的人脸识别。我得到了它的工作，但当我尝试使用更大的图像文件夹时，它会因这些错误而停止：

OpenCV错误：cv :: OutOfMemoryError中的内存不足（无法分配411068928字节），文件C：\ builds \ master_PackSlaveAddon-win32-vc12-static \ opencv \ modules \ core \ src \ alloc.cpp，第52行OpenCV错误：断言失败（u！= 0）在cv :: Mat :: create中，文件C：\ builds \ master_PackSlaveAddon-win32-vc12-static \ opencv \ modules \ core \ src \ matrix.cpp，line 411线程异常“main”CvException [org.opencv.core.CvException：cv :: Exception：C：\ builds \ master_PackSlaveAddon-win32-vc12-static \ opencv \ modules \ core \ src \ matrix.cpp：411：error：（-215 ）在FaceDetector.main的org.opencv.objdetect.CascadeClassifier.detectMultiScale_1（本地方法）中的org.opencv.objdetect.CascadeClassifier.detectMultiScale（CascadeClassifier.java:103）中的函数cv :: Mat :: create中的u！= 0 （FaceDetector.java:42）

import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.plaf.synth.SynthSeparatorUI;

import org.opencv.core.Core;
import org.opencv.core.CvType;
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;

public class FaceDetector {
    public static void main(String[] args) throws IOException {
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    System.out.println("\nRunning FaceDetector");

    CascadeClassifier faceDetector = new CascadeClassifier("C:/Users/Family/workspace/detect face/haarcascade_frontalface_alt.xml");

    File folder = new File("C:\\Users\\Family\\Downloads\\Photos (4)");
    File[] listOfFiles = folder.listFiles();

    for (int j = 0; j < listOfFiles.length; j++) {
        System.out.println(listOfFiles[j]);
    }

    for (int i = 0; i < listOfFiles.length-1; i++){
        String picname = listOfFiles[i].toString();

        System.out.println("reading: " + listOfFiles[i]);

        Mat image = Imgcodecs.imread(picname);

        MatOfRect faceDetections = new MatOfRect();
        faceDetector.detectMultiScale(image, faceDetections);

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


        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 (0, 255, 0));
        }

        Rect recta = new Rect();

        for (Rect rect : faceDetections.toArray()) {
            recta.x = rect.x;
            recta.y = rect.y;
            recta.width = rect.width;
            recta.height = rect.height;
        }


        if (faceDetections.toArray().length == 1) {
            BufferedImage picture = ImageIO.read(new File(picname));
            BufferedImage croppedImage = picture.getSubimage(recta.x, recta.y, recta.width, recta.height);

//              File finalCropped = new     File(listOfFiles[i].toString()+"cropped.jpg");
            File finalCropped = new File("C:/Users/Family/Downloads/CroppedImages/" + "cropped" + (i + 140) + ".jpg");

            ImageIO.write(croppedImage, "jpg", finalCropped);

            System.out.println("Cropping " + i + "/" + listOfFiles.length);

        }

        faceDetections.release();
    }
    System.out.println("Process complete.");

}
}

Answer 1

您也应该释放image个对象。我想建议最后使用try catch来正确释放。

image.release();

Answer 2

您是否尝试过增加堆空间？看看here。

java.lang.OutOfMemoryError：当应用程序尝试将更多数据添加到堆空间区域时，将触发Java堆空间错误，但没有足够的空间。

java opencv错误内存不足和断言失败

2 个答案: