Ghostscript 9.54.0 (2021-03-19)
... a maintenance release, and also adds new functionality.
Highlights in this release include:
Overprint simulation is now available to all output devices, allowing quality previewing/proofing of PostScript and PDF jobs that rely on overprint. See the -dOverprint option documentation in: Overprint
The "docxwrite" device adds the ability to output to Microsoft Word "docx" (it currently only handles text). See: docxwrite
The pdfwrite device is now capable of using the Tesseract OCR engine when it is built into Ghostscript to improve searchability and copy and paste functionality when the input lacks the metadata for that purpose. See: UseOCR
Ghostscript/GhostPDL now includes a "map text to black" function, where text drawn by an input job (except when drawn using a Type 3 font) can be forced to draw in solid black. See: BlackText
Ghostscript/GhostPDL now supports simple N-up imposition "internally". See: NupControl
Our efforts in code hygiene and maintainability continue.
The usual round of bug fixes, compatibility changes, and incremental improvements.
(9.53.0) We have added the capability to build with the Tesseract OCR engine. In such a build, new devices are available (pdfocr8/pdfocr24/pdfocr32) which render the output file to an image, OCR that image, and output the image "wrapped" up as a PDF file, with the OCR generated text information included as "invisible" text (in PDF terms, text rendering mode 3).
Mainly due to time constraints, we only support including Tesseract from source included in our release packages, and not linking to Tesseract/Leptonica shared libraries. Whether we add this capability will be largely dependent on community demand for the feature.
See Enabling OCR for more details.