PDF to Text OCR Converter Command Line
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Description:
  1. Convert text based PDF files to plain text files.
  2. Convert scanned PDF files and image files to plain text files and searchable PDF files by OCR technology.
  3. Convert embedded fonts in PDF file to a new searchable PDF file.
  4. Keep color during PDF, TIFF and image formats to searchable PDF files conversion.
  5. Deskew, Despeckle and Noise Removal, Auto-Orientation, Dithering, Black Border Removal.
Input formats:
  1. Text based PDF files
  2. Scanned PDF files
  3. Scanned single page and multi-page TIFF files
  4. Scanned JPEG, PNG, BMP, GIF, PCX, TGA, PBM, PNM, PPM files
Output formats:
  1. Plain text files without layout
  2. Plain text files with layout
  3. Plain text based PDF files (PDF is contain text only)
  4. Attach OCRed text layer to original PDF file
  5. OCRed BW PDF files with hidden text layer
  6. OCRed Color PDF files with hidden text layer
  7. OCRed Grayscale PDF files with hidden text layer
  8. Output to TIFF, PNG, BMP, TGA, GIF with Deskew, Despeckle, etc. options
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Usage: pdf2txtocr.exe [options] [PDF-file] [Text-file]
  -firstpage [int]      : first PDF page to convert
  -lastpage [int]       : last PDF page to convert
  -res [int]            : set resolution, the unit is DPI (default is 300 dpi)
  -ownerpwd [string]    : set owner password for encrypted PDF file
  -userpwd [string]     : set user password for encrypted PDF file
  -layout               : maintain original physical layout
  -layout2              : pdf to table conversion with Best Column Alignment
  -table                : same as -layout2
  -pdf2table            : same as -layout2
  -noc                  : don't insert page breaks 0x0C between pages in text file
  -bitcount [int]       : set color depth when render PDF page to image data, it can be set 1, 8, 24, default is 8bit
  -rotate [int]         : rotate pages before OCR
  -threshold [int]      : lightness threshold that used to convert image to B&W, from 1 to 255, 0 is auto, default is -1
  -imageopt             : deskew and despeckle images automatically
  -dither [int]         : convert the color image to B&W using the desired method:
    -dither 0: Floyd-Steinberg
    -dither 1: Ordered-Dithering (4x4)
    -dither 2: Burkes
    -dither 3: Stucki
    -dither 4: Jarvis-Judice-Ninke
    -dither 5: Sierra
    -dither 6: Stevenson-Arce
    -dither 7: Bayer (4x4 ordered dithering)
  -resizewidth [int]    : resize the image's width, only availalbe when -resizeheight used
  -resizeheight [int]   : resize the image's height, only availalbe when -resizewidth used
  -flip                 : flip the image vertically
  -mirror               : mirror the image horizontally
  -ocr                  : enable OCR function for scanned PDF file
  -lang [string]        : choose the language for OCR engine
  -ocrmode [int]        : set OCR mode
    -ocrmode 0: output to text file
    -ocrmode 1: OCR PDF pages and insert new text layer under original PDF pages
    -ocrmode 2: output to plain text based PDF file
    -ocrmode 3: output to OCRed PDF file (BW) with hidden text layer
    -ocrmode 4: output to OCRed PDF file (Color) with hidden text layer
  -text [string]        : add additional text at end of each text page, this parameter supports the following variables:
    %PageNumber%: current page number
    %PageCount% : total page count of PDF file
  -outboxfile           : output [X, Y, Width, Height] information for each word when OCR
  -producer [string]    : Set 'producer' to output PDF file
  -creator [string]     : Set 'creator' to output PDF file
  -subject [string]     : Set 'subject' to output PDF file
  -title [string]       : Set 'title' to output PDF file
  -author [string]      : Set 'author' to output PDF file
  -keywords [string]    : Set 'keywords' to output PDF file
  -ownerpwdout [string] : Set 'owner password' to output PDF file
  -openpwdout [string]  : Set 'open password' to output PDF file
  -keylen [int]         : Key length (40 or 128 bit)
        -keylen 0:  40 bit RC4 encryption (Acrobat 3 or higher)
        -keylen 1: 128 bit RC4 encryption (Acrobat 5 or higher)
        -keylen 2: 128 bit RC4 encryption (Acrobat 6 or higher)
  -encryption [int]     : Restrictions
        -encryption    0: Encrypt the file only
        -encryption 3900: Deny anything
        -encryption    4: Deny printing
        -encryption    8: Deny modification of contents
        -encryption   16: Deny copying of contents
        -encryption   32: No commenting
        ===128 bit encryption only -] ignored if 40 bit encryption is used
        -encryption  256: Deny FillInFormFields
        -encryption  512: Deny ExtractObj
        -encryption 1024: Deny Assemble
        -encryption 2048: Disable high res. printing
        -encryption 4096: Do not encrypt metadata
  -$ [string]           : input your License Key
Examples:
  pdf2txtocr.exe C:\in.pdf C:\out.txt
  pdf2txtocr.exe -firstpage 1 -lastpage 1 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ocr -res 300 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ownerpwd 123 -userpwd 456 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -layout C:\in.pdf C:\out.txt
  pdf2txtocr.exe -layout2 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -table C:\in.pdf C:\out.txt
  pdf2txtocr.exe -pdf2table C:\in.pdf C:\out.txt
  pdf2txtocr.exe -noc C:\in.pdf C:\out.txt
  pdf2txtocr.exe C:\in.tif C:\out.txt
  pdf2txtocr.exe C:\in.jpg C:\out.txt
  pdf2txtocr.exe C:\in.bmp C:\out.txt
  pdf2txtocr.exe C:\in.png C:\out.txt
  pdf2txtocr.exe -ocr -lang eng C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ocr -bitcount 1 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ocr -bitcount 8 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ocr -bitcount 24 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ocr -lang deu C:\in.pdf C:\out.txt
  pdf2txtocr.exe -lang deu C:\in.tif C:\out.txt
  pdf2txtocr.exe -text "PageText %PageNumber% of %PageCount%" C:\in.pdf C:\out.txt
  pdf2txtocr.exe -subject "subject" C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ownerpwdout 123 -keylen 2 -encryption 3900 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -subject "subject" -title "title" C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang eng -ocrmode 0 C:\in.pdf C:\out.txt
  pdf2txtocr.exe -ocr -lang deu -ocrmode 1 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang eng -ocrmode 2 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang eng -ocrmode 3 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang eng -ocrmode 2 -outboxfile C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang fra -ocrmode 1 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang ita -ocrmode 1 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang nld -ocrmode 1 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocr -lang spa -ocrmode 1 C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -bitcount 24 -ocrmode 4 -ocr C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -bitcount 8 -ocrmode 4 -ocr C:\in.pdf C:\out.pdf
  pdf2txtocr.exe -ocrmode 4 -ocr C:\in.tif C:\out.pdf
  pdf2txtocr.exe -ocrmode 3 -threshold 200 -ocr C:\in.tif C:\out.pdf
  pdf2txtocr.exe -ocrmode 4 -rotate 90 -ocr C:\in.tif C:\out.pdf

Process image files with Deskew, Despeckle and Noise Removal, Black Border Remova options:
  pdf2txtocr.exe -imageopt C:\in.tif C:\out.tif
  pdf2txtocr.exe -imageopt -rotate 45 C:\in.png C:\out.tif
  pdf2txtocr.exe -imageopt -rotate 90 C:\in.png C:\out.tif
  pdf2txtocr.exe -imageopt -threshold 0 C:\in.tif C:\out.bmp
  pdf2txtocr.exe -threshold 240 C:\in.tif C:\out.bmp
  pdf2txtocr.exe -dither 0 C:\in.bmp C:\out.png
  pdf2txtocr.exe -dither 7 C:\in.bmp C:\out.png
  pdf2txtocr.exe -imageopt -resizewidth 800 -resizeheight 600 C:\in.gif C:\out.tga
  pdf2txtocr.exe -imageopt -flip C:\in.png C:\out.gif
  pdf2txtocr.exe -imageopt -mirror C:\in.tif C:\out.pcx
  pdf2txtocr.exe -imageopt C:\in.bmp C:\out.tif

Following command line will OCR all PDF files in D:\temp\ folder to text files:
  for %F in (D:\temp\*.pdf) do pdf2txtocr.exe -ocr -lang deu "%F" "%~dpnF.txt"

Following command line will OCR all PDF files in D:\temp\ folder and subdirectories to text files:
  for /r D:\temp %F in (*.pdf) do pdf2txtocr.exe -ocr "%F" "%~dpnF.txt"

Following command line will OCR all PDF files from D:\temp\ folder and output text files to C:\test folder:
  for %F in (D:\temp\*.pdf) do pdf2txtocr.exe -ocr "%F" "C:\test\%~nF.txt"