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Tesseract.tess_alto — Function
tess_alto(
    inst::TessInst,
    page::Integer = Int32(1)
)::Union{String, Nothing}

Extract the text in ALTO format from the image. Returns nothing if there is an error.

Arguments:

TNameDefaultDescription
RinstThe instance to grab the text from.
OpageInt32(1)The page to extract the ALTO text for.

Details:

This method will call tess_recognize() if it has not been called yet for the image. The current ALTO spec can be accessed at https://github.com/altoxml/documentation/wiki/Versions.

Example:

using Tesseract

download_languages()

instance = TessInst()
pix = sample_pix()

tess_image(instance, pix)
tess_resolution(instance, 72)

alto = tess_alto(instance)

for line in split(alto, '\n'; keepempty = false)[1:5]
    println(strip(line))
end

# output

<Page WIDTH="500" HEIGHT="600" PHYSICAL_IMG_NR="0" ID="page_0">
<PrintSpace HPOS="0" VPOS="0" WIDTH="500" HEIGHT="600">
<ComposedBlock ID="cblock_0" HPOS="10" VPOS="9" WIDTH="479" HEIGHT="514">
<TextBlock ID="block_0" HPOS="11" VPOS="9" WIDTH="406" HEIGHT="14">
<TextLine ID="line_0" HPOS="11" VPOS="9" WIDTH="406" HEIGHT="14">

See also: tess_text, tess_hocr, tess_tsv, tess_parsed_tsv, tess_confidences

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