It works!
I tried tesseract-ocr 5.0.0 RC2 + leptonica 1.8.2 and with it, my and your
code worked flawlessly. It seems like the 4.1.3 has a bug in it, that has
been fixed in 4.1.3. I didn't tested 5.0, because I thought It would be
more unstable.
I extra tested 4.1.3 + leptonica 1.8.2 (was on 1.7.x somewhat before) and
the problem with corrupt pdf still exists. But that's not a problem, I will
use 5.0.0 instead.
Thank you zdenop!
zdenop schrieb am Montag, 22. November 2021 um 14:33:15 UTC+1:
> 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 <
>> tesser...@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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>>>
>>
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