Tesseract.tess_pipeline_hocr

Tesseract.tess_pipeline_hocr — Function

tess_pipeline_hocr(
    pipe::TessPipeline,
    filename::AbstractString,
    fontInfo::Bool = false
)::Bool

Generate a HOCR file from the pipeline and save it to the specified file. Returns false if there is a problem adding the HOCR generator to the output.

Arguments:

T	Name	Default	Description
R	pipe		The pipline to collect the HORC text from.
R	filename		The file to write the HORC text to.
O	fontInfo	`false`	Should font information be included in the output?

Details:

If the file exists it will be overwritten.

Examples:

using Tesseract

# Generate some pages to load.
write("page01.tiff", sample_tiff())
write("page02.tiff", sample_tiff())
write("page03.tiff", sample_tiff())

download_languages() # Make sure we have the data files.

instance = TessInst()
pipeline = TessPipeline(instance)

tess_pipeline_hocr(pipeline, "My Book.hocr")

tess_run_pipeline(pipeline, "My First Book") do add
    add(pix_read("page01.tiff"), 72)
    add(pix_read("page02.tiff"), 72)
    add(pix_read("page03.tiff"), 72)
end

for line in readlines("My Book.hocr")[1:10]
    println(line)
end

# output

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    <head>
        <title>My First Book</title>
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
        <meta name='ocr-system' content='tesseract 5.1.0' />
        <meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_wconf'/>
    </head>

source

tess_pipeline_hocr(
    pipe::TessPipeline,
    fontInfo::Bool = false
)::Union{TessOutput{String}, Nothing}

Generate an HOCR file from the pipeline and save it to a string. Returns nothing if there is a problem adding the HOCR generator to the output.

Arguments:

T	Name	Default	Description
R	pipe		The pipline to collect the HOCR text from.
O	fontInfo	`false`	Should font information be included in the output?

Examples:

using Tesseract

# Generate some pages to load.
write("page01.tiff", sample_tiff())
write("page02.tiff", sample_tiff())
write("page03.tiff", sample_tiff())

download_languages() # Make sure we have the data files.

instance = TessInst()
pipeline = TessPipeline(instance)

book = tess_pipeline_hocr(pipeline)

tess_run_pipeline(pipeline, "My First Book") do add
    add(pix_read("page01.tiff"), 72)
    add(pix_read("page02.tiff"), 72)
    add(pix_read("page03.tiff"), 72)
end

for line in split(book[], "\n")[1:10]
    println(line)
end

# output

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    <head>
        <title>My First Book</title>
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
        <meta name='ocr-system' content='tesseract 5.1.0' />
        <meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_wconf'/>
    </head>

source

tess_pipeline_hocr(
    func::Function,
    pipe::TessPipeline,
    fontInfo::Bool = false
)::Bool

Generate an HOCR file from the pipeline and pass it back to the client via a callback. Returns false if there is a problem adding the HOCR generator to the output.

Arguments:

T	Name	Default	Description
R	func		The function to call with the lines of text.
R	pipe		The pipline to collect the text from.
O	fontInfo	`false`	Should font information be included in the output?

Details:

The text will be passed to the caller one line at a time. The "\n" line terminator will be included with the text.

Examples:

using Tesseract

# Generate some pages to load.
write("page01.tiff", sample_tiff())
write("page02.tiff", sample_tiff())
write("page03.tiff", sample_tiff())

download_languages() # Make sure we have the data files.

instance = TessInst()
pipeline = TessPipeline(instance)

count = 0
tess_pipeline_hocr(pipeline) do line
    global count
    if count < 10
        print(line)
    end
    count += 1
end

tess_run_pipeline(pipeline, "My First Book") do add
    add(pix_read("page01.tiff"), 72)
    add(pix_read("page02.tiff"), 72)
    add(pix_read("page03.tiff"), 72)
end

# output

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    <head>
        <title>My First Book</title>
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
        <meta name='ocr-system' content='tesseract 5.1.0' />
        <meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_wconf'/>
    </head>
true

source