Take in image from memory, get PDF output

[Michael Kadziela]

Hey all,  and thanks for assisting.

I'm currently working on a pipeline that takes in PDFs, converts them to images, feeds them to Tesseract, and outputs a combined PDF at the end with a readable text layer.

I'm up to the Tesseract part, and I'm stuck with the API and unsure how to continue. Essentially I want to give Tesseract an image from memory, such as a Pix from Leptonica. This works currently for outputting a text string, but I can't find in the API any sort of method that uses the image that was given to the Tesseract instance, and can render a PDF output. They all seem to want a filepath rather than using the set image for the Tesseract instance.
Is there an API somewhere for this, or a work around?

Thanks! 

[Zdenko Podobny]

I did not test it, but have a look at  ProcessPagesMultipageTiff [1] for inspiration - it uses  TessBaseAPI::ProcessPage(Pix *pix,...  renderer) [2]  , so you could be able create pdf with images from memory.

Please share your experience and code snippet with the community if you are successful ;-)

[1] https://github.com/tesseract-ocr/tesseract/blob/424b17f997363670d187f42c43408c472fe55053/src/api/baseapi.cpp#L1030

[2] https://github.com/tesseract-ocr/tesseract/blob/424b17f997363670d187f42c43408c472fe55053/src/api/baseapi.cpp#L1253

Zdenko

št 4. 8. 2022 o 5:59 Michael Kadziela <kadt...@gmail.com> napísal(a):

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