Why can't recognize characters in C++ code?

[易鑫]

Hello,everyone:

    I have fine tuned a new lstm model named engtuned.traineddata. I have test it in the command line,it is okay.

In the command line:

PS D:\git_workspace\TableOcrRecognition\Tesserac-OCR-Train> tesseract D:\git_workspace\TableOcrRecognition\TableDetect\TableDetect\Data\Tmp\2.png stdout -l engtuned --psm 7 --oem 3

Warning: Invalid resolution 0 dpi. Using 70 instead.

Q345L90X8

The result is good,but when I used it in C++ code,it can not recognize the characters correctly.Here is my C++ code.

 tesseract::TessBaseAPI *tessApi = new tesseract::TessBaseAPI();

    // --psm 7 --oem 3

    if (tessApi->Init("../../tessdata", "engtuned", tesseract::OcrEngineMode::OEM_DEFAULT)) {

        std::cout << "OCRTesseract: Could not initialize tesseract." << std::endl;

        return EINITTESS;

    }

    // setup

    tessApi->SetPageSegMode(tesseract::PageSegMode::PSM_SINGLE_LINE);

    tessApi->SetVariable("save_best_choices", "T");

    ...

   tessApi->SetImage(binImg.data, binImg.cols, binImg.rows, binImg.step[1], binImg.step[0]);

        

    tessApi->Recognize(0);

    string result = std::unique_ptr<char[]>(tessApi->GetUTF8Text()).get();

    cout << result < <endl;

I do not know where is wrong,can you help? thanks a lot.

[易鑫]

The problem has been solved.The reason is that the binary image should use white as background and black as foreground,

Maybe there exist some issues during my training process.

易鑫 <yixinl...@gmail.com> 于2019年1月30日周三 上午10:38写道：

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