Tesseract / Tess4J 在 Mac OS X 上崩溃：有问题的框架：C [libtesseract.dylib+0xcf72] tesseract::TessResultRenderer::~TessResultRenderer()+0x10

Question

我在 Mac OS X 上使用 Tesseract 和 Java 包装库 Tess4J 运行了一个简单的程序。JDK7 和 JDK8 都试过了。

代码对图像进行 OCR 并从中创建 PDF。该代码有效并完成了它应该做的事情（pdf被创建得很好）。但最后，我在我的 Mac 上收到了崩溃报告。

private static void testTesseract() throws Exception {
    File imageFile = new File("/Users/mln/Desktop/urkunde.jpg");
    ITesseract instance = new Tesseract();  // JNA Interface Mapping

    // http://tess4j.sourceforge.net/tutorial/

    instance.setDatapath("/Users/mln/Desktop/tessdata");
    instance.setLanguage("deu");

    try {
        String result = instance.doOCR(imageFile);
        System.out.println(result);
    } catch (TesseractException e) {
        System.err.println(e.getMessage());
    }

    List<ITesseract.RenderedFormat> list = new ArrayList<ITesseract.RenderedFormat>();
    list.add(ITesseract.RenderedFormat.PDF);
    File pdfFile = new File("/Users/mln/Desktop/urkunde.jpg");
    instance.createDocuments(pdfFile.getAbsolutePath(), "/Users/mln/Desktop/urkunde", list);

}

导致崩溃的行是最后一行：

instance.createDocuments(pdfFile.getAbsolutePath(), "/Users/mln/Desktop/urkunde", list);

控制台输出：

Warning in pixReadMemJpeg: work-around: writing to a temp file
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00000001295c9f72, pid=6336, tid=5891
#
# JRE version: Java(TM) SE Runtime Environment (8.0_31-b13) (build 1.8.0_31-b13)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.31-b07 mixed mode bsd-amd64 compressed oops)
# Problematic frame:
# C  [libtesseract.dylib+0xcf72]  tesseract::TessResultRenderer::~TessResultRenderer()+0x10
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /Users/mln/Projects/jackrabbit-client/hs_err_pid6336.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

Process finished with exit code 134 (interrupted by signal 6: SIGABRT)

和崩溃报告：

Process:               java [6336]
Path:                  /Library/Java/JavaVirtualMachines/jdk1.8.0_31.jdk/Contents/Home/bin/java
Identifier:            net.java.openjdk.cmd
Version:               1.0 (1.0)
Code Type:             X86-64 (Native)
Parent Process:        idea [81650]
Responsible:           java [6336]
User ID:               501

Date/Time:             2016-10-28 11:09:35.377 +0200
OS Version:            Mac OS X 10.11.6 (15G1004)
Report Version:        11
Anonymous UUID:        6CF2EEC0-C9B5-315F-EB2E-5AEBDF0094FD

Sleep/Wake UUID:       F9F2D823-9374-4EC4-B8FD-9342826E1A37

Time Awake Since Boot: 600000 seconds
Time Since Wake:       10000 seconds

System Integrity Protection: enabled

Crashed Thread:        4

Exception Type:        EXC_BAD_ACCESS (SIGABRT)
Exception Codes:       EXC_I386_GPFLT
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
abort() called

pastebin 上的完整输出：http://pastebin.com/v9gPd4hk

Answer 1

我自己没有测试过，但它看起来像 createDocuments 调用 init() 和 dispose() 和 doOCR()。您可能想尝试覆盖这些方法以仅调用每个方法。有点像在黑暗中拍摄，但它似乎是合理的。

@Override
public void createDocuments(String[] filenames, String[] outputbases, List<RenderedFormat> formats) throws TesseractException {
    if (filenames.length != outputbases.length) {
        throw new RuntimeException("The two arrays must match in length.");
    }

    init();
    setTessVariables();

    try {
        for (int i = 0; i < filenames.length; i++) {
            File workingTiffFile = null;
            try {
                String filename = filenames[i];

                // if PDF, convert to multi-page TIFF
                if (filename.toLowerCase().endsWith(".pdf")) {
                    workingTiffFile = PdfUtilities.convertPdf2Tiff(new File(filename));
                    filename = workingTiffFile.getPath();
                }

                TessResultRenderer renderer = createRenderers(outputbases[i], formats);
                createDocuments(filename, renderer);
                TessDeleteResultRenderer(renderer);
            } catch (Exception e) {
                // skip the problematic image file
                logger.error(e.getMessage(), e);
            } finally {
                if (workingTiffFile != null && workingTiffFile.exists()) {
                    workingTiffFile.delete();
                }
            }
        }
    } finally {
        dispose();
    }
}