Tesseract / Tess4J在Mac OS X上崩溃:问题框架:C [libtesseract. C]dylib

Question

我在Mac OS x上使用Tesseract和Java包装器库Tess4J运行了一个简单的程序。

代码对图像进行OCR并从中创建PDF。代码工作并做它应该做的事情(pdf被创建得很好)。但是最后，我的Mac上出现了一个崩溃报告。

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的完整输出:http://pastebin.com/v9gPd4hk

Answer 1

我自己还没有测试过，但它看起来像createDocuments调用init()和dispose(), doOCR()也是如此。您可能希望尝试重写这些方法，以便只调用每个方法一次。有点像瞎猜，但似乎很合理。

@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();
    }
}