jTessBoxEditorFX - 无法处理600dpi .png文件

Question

我有一个pdf，我已经转换为.png 500dpi和600dpi。 （见下文）。 500dpi版本适用于jTessBoxEditor。但是，600dpi失败了。我已经尝试按照建议here增加JVM堆大小。即使是600 dpi的图像也只有91KB。即使我将JVM堆大小设置得非常大，也可以通过运行jTessBoxEditor：

export JAVA_HOME="/Library/Internet Plug-ins/JavaAppletPlugin.plugin/Contents/Home/"  ## necessary to get latest java runtime environment because I am on a mac.
java -Xms1024m -Xmx2048m -jar jTessBoxEditorFX.jar

我仍然无法打开600dpi版本。相反，我在终端中遇到了很长的错误。其中的一些片段是：

java.lang.NullPointerException
    at com.sun.javafx.sg.prism.NGCanvas$RenderBuf.validate(NGCanvas.java:213)
    at com.sun.javafx.sg.prism.NGCanvas.initCanvas(NGCanvas.java:640)
    at com.sun.javafx.sg.prism.NGCanvas.renderContent(NGCanvas.java:603)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2053)
    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1945)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:235)

...

java.lang.NullPointerException
    at com.sun.javafx.sg.prism.NGCanvas$RenderBuf.validate(NGCanvas.java:213)
    at com.sun.javafx.sg.prism.NGCanvas.initCanvas(NGCanvas.java:640)
    at com.sun.javafx.sg.prism.NGCanvas.renderForcedContent(NGCanvas.java:624)
    at com.sun.javafx.sg.prism.NGGroup.renderForcedContent(NGGroup.java:198)
    at com.sun.javafx.sg.prism.NGGroup.renderForcedContent(NGGroup.java:198)
    at com.sun.javafx.sg.prism.NGGroup.renderForcedContent(NGGroup.java:198)
    at com.sun.javafx.sg.prism.NGGroup.renderForcedContent(NGGroup.java:198)

...

    at com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1945)
    at com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:477)
    at com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:330)
    at com.sun.javafx.tk.quantum.PresentingPainter.run(PresentingPainter.java:91)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:125)
    at java.lang.Thread.run(Thread.java:745)

500dpi图片在这里：

和600dpi图像在这里：

Answer 1

我看到你做过同样的事情。除非您需要处理复杂的脚本，否则我建议您使用非JavaFX版本。