PDF/A format

PDF format section provides tuning parameters of recognized text export in PDF/A format. PDF/A is a long-term archiving format base on PDF and has two levels of compliance: PDF/A-1a which applies to semantic correctness and structure, and PDF/A-1b that applies to visual integrity of the document.

Save mode: this option determines the mode in which PDF/A export is saved in the file (default: Text under the page image)
Options:

Text and pictures only: The recognized text is saved as text and the pictures as pictures. The original document design (font, background and layout marking) is not retained.
Text over the page image: The entire image is saved as a picture. Text areas are saved as text over the picture.
Text under the page image: The entire image is saved as a picture. The recognized text is put under it. This option is useful if you export your text to document archives: the full page layout is retained and the full-text search is available if you save in this mode.
Page image only: The entire image is saved as a picture.
Text only: The recognized text is saved as text. Pictures are not saved.

Save as PDF/A-1a: specifies if the recognized text should be exported to PDF/A-1a format (default: Unchecked)

Picture format: specifies the image format to be used during export to a PDF/A file with embedded pictures
Options for binary pictures (default: CCITT4):

CCITT4: ZIP compression algorithm will be used during export.
JBIG2: JBIG2 compression algorithm will be used during export.

Options for gray pictures (default: JPEG Gray):

Automatic: format is defined automatically.
JPEG Gray: gray JPEG format.
ZIP Gray: ZIP compression algorithm will be used during export in gray.
CCITT4: ZIP compression algorithm will be used during export.
JBIG2: JBIG2 compression algorithm will be used during export.

Options for color pictures (default: JPEG Color):

Automatic: format is defined automatically.
JPEG Color: color JPEG format.
JPEG Gray: gray JPEG format.
ZIP Color: ZIP compression algorithm will be used during export in color.
ZIP Gray: ZIP compression algorithm will be used during export in gray.
CCITT4: ZIP compression algorithm will be used during export.
JBIG2: JBIG2 compression algorithm will be used during export.

Picture resolution: stores the value of picture resolution in dpi, which is used for exporting pictures to PDF/A format (default: Preserve)

JPEG quality: stores the value of the JPEG quality for color pictures saved in PDF/A format in percent (default: 50)

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