I am a new Tesseract user and am having probems with larger bytes size files using JTess. Is there a buffer I can set to allow for processing larger data sets?

[Tesseract1]

I am able to process smaller files say up to 160 kb

When I hit 220 to 250 kb, I am having issues and getting the following error:

Exception in thread "main" java.lang.Error: Invalid memory access
    at com.sun.jna.Native.invokePointer(Native Method)
    at com.sun.jna.Function.invokePointer(Function.java:470)
    at com.sun.jna.Function.invoke(Function.java:404)
    at com.sun.jna.Function.invoke(Function.java:315)
    at com.sun.jna.Library$Handler.invoke(Library.java:212)
    at com.sun.proxy.$Proxy0.TessBaseAPIGetUTF8Text(Unknown Source)
    at net.sourceforge.tess4j.Tesseract.getOCRText(Unknown Source)
    at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
    at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
    at com.nationwide.robot.MinP98TextReader.main(MinP98TextReader.java:34)
split_pt >0 && split_pt < word->chopped_word->NumBlobs():Error:Assert failed:in file ..\..\ccmain\tfacepp.cpp, line 186

Using the following code

Tesseract instance = new Tesseract();
             String result = instance.doOCR(outputFile );

Now if I set a rectangle in the doOCR I am able to process that rectangle but not the complete image of course limited to the rectangle.  I stepped the rectangle around the file to determine if there is an issue and cannot find a problem with the processing of the image, just a problem with processing the entire image.

so if I process

new Rectangle(0, 0,1200, 1000)  It works

If I exceed to new Rectangle(0, 0,1400, 1000), it fails with the above error.


Is there some buffer size I need to adjust to allow for processing the larger image or higher text  content images?

Or is there a strategy I can employ other than making lots of rectangles :)

[Quan Nguyen]

The exception was thrown because you had specified a rectangle larger than, or outside of, the image. So make sure it is within bounds.