this is my old snippet, so part of the code is useless for pdf rendering
(opening the input image as PIX).
Zdenko
po 22. 11. 2021 o 14:28 Zdenko Podobny <zde...@gmail.com> napísal(a):
> Here is a simple code, that works for me (with tesseract 5 and leptonica
> 1.82)
>
> #include <leptonica/allheaders.h>
> #include <tesseract/baseapi.h>
> #include <tesseract/renderer.h>
> #include <string>
>
> int main() {
> const char* datapath = "f:/Project-Personal/tessdata_best/tessdata";
> std::string language_ = "eng";
> std::string inputFile_ = "input.png";
> const char* outputbase = "output";
>
> tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
> if (api->Init(datapath, language_.c_str(), tesseract::OEM_LSTM_ONLY)) {
> fprintf(stderr, "Could not initialize tesseract.\n");
> exit(1);
> }
>
> PIX *sourceImg = pixRead(inputFile_.c_str());
> if (!sourceImg) {
> fprintf(stderr, "Leptonica can't process input file: %s\n",
> inputFile_.c_str());
> return EXIT_FAILURE;
> }
> api->SetImage(sourceImg);
> api->SetInputName(inputFile_.c_str());
> api->SetOutputName(outputbase);
>
> tesseract::TessPDFRenderer* renderer =
> new tesseract::TessPDFRenderer(outputbase, api->GetDatapath());
> if (!renderer->happy()) {
> printf("Error, could not create PDF output file: %s\n",
> strerror(errno));
> delete renderer;
> }
>
> bool succeed = api->ProcessPages(inputFile_.c_str(), nullptr, 0,
> renderer);
> if (!succeed) {
> fprintf(stderr, "Error during processing.\n");
> return EXIT_FAILURE;
> }
>
> api->End();
> pixDestroy(&sourceImg);
> return 0;
> }
>
>
> Zdenko
>
>
> ne 21. 11. 2021 o 23:16 'blaumedia' via tesseract-ocr <
> tesseract-ocr@googlegroups.com> napísal(a):
>
>> Hi zdenop,
>>
>> thanks for your tip, but I'm using the ProcessPage*s* function, so it
>> should write the head and footer part of the file itself.
>> BUT I've played a bit with ProcessPage() + BeginDocument() before and
>> EndDocument() after and the resulting file has big differences. Sadly, the
>> file is still corrupt.
>>
>> So it seems the problem is based on the failing begin/enddocument
>> function. But even there I'm experiencing mysterious bugs.
>> Using only EndDocument(), I have something like a footer at the end of
>> the file:
>> [image: r3mxpijfjkxk073pmzquqm343_testjpg.pdf_ff — gosseract [SSH:
>> root.debdocker.home.blaumedia.com]_2021-11-21 23-07-40_MacPro.png]
>>
>> But it suddenly stops at "Produce". But when I'm using BeginDocument(),
>> ProcessPage() and then EndDocument() the file is ending with bytes and
>> there is no "endstream" or "endobj".
>> I've updated to latest 4.1.3 version but problem still exists.
>>
>> I updated the bug branch in
>> https://github.com/dnnspaul/gosseract/tree/tesseract/bug%2F3652 so the
>> problem is reproducible.
>> To disable the BeginDocument, one have to comment out
>> https://github.com/dnnspaul/gosseract/blob/tesseract/bug/3652/tessbridge.cpp#L187
>> .
>>
>> I tried to use 1:1 the code from the tesseract cli but it still does not
>> work...
>>
>> zdenop schrieb am Sonntag, 21. November 2021 um 13:18:52 UTC+1:
>>
>>> seems like the same problem as
>>> https://github.com/sirfz/tesserocr/issues/271#issuecomment-919334885
>>>
>>> Did you use BeginDocument EndDocument ?
>>>
>>> Zdenko
>>>
>>>
>>> ne 21. 11. 2021 o 9:27 'blaumedia' via tesseract-ocr <
>>> tesser...@googlegroups.com> napísal(a):
>>>
>>>> Described already in issue:
>>>> https://github.com/tesseract-ocr/tesseract/issues/3652
>>>>
>>>> I'm trying to generate a searchable PDF outgoing from a jpg image, but
>>>> the file that gets output is an invalid pdf file that can't be read by any
>>>> pdf reader.
>>>>
>>>> I have added an docker image for reproduction of the problem in the
>>>> issue, but here is the bash snippet for it:
>>>>
>>>> *git clone g...@github.com:dnnspaul/gosseract.git*
>>>> *git checkout tesseract/bug/3652*
>>>>
>>>> *docker build -t tessbug .*
>>>> *docker run -it -v $PWD/tmp:/tmp tessbug go run main.go*
>>>>
>>>> When I'm inputting the file in the tesseract cli, the outcoming pdf is
>>>> readable, but I can't find any difference between the cli and my snippet.
>>>>
>>>> Thanks in advance for any help! I'm very sorry, I'm more a GoLang
>>>> developer, than a C ++ developer so I have kind of problems with the
>>>> simplest syntax, but tried my best.
>>>>
>>>> --
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>>>> .
>>>>
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