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The LEADTOOLS PDF SDK Plug-ins support loading±, saving, viewing±, rasterizing±, and encoding of PDF, Postscript and EPS formats and integrates seamlessly with the broad imaging functionality present in the LEADTOOLS toolkits, encompassing specialized display, color-conversion, image-processing, scanning, annotations, document clean-up, and much more.

Adds on to:

LEADTOOLS PDF Plug-in (Read)
LEADTOOLS PDF Plug-in (Write)

Loading Capabilities±

The LEADTOOLS PDF plug-in ± has the following import capabilities:

  • Loads PDF 1.4 files. ±
  • Loads PostScript Language Level 3 files. ±
  • Loads EPS files. ±
  • Support is provided for loading the entire document or a specified set of sequential pages. ±

The plug-in provides a number of options for controlling the rasterization± of the page, including:

  • Pixel depth - Valid values are 1,4,8 and 24.±
  • Horizontal resolution in dots per inch. ±
  • Vertical resolution in dots per inch. ±
  • Ability to use fonts installed by the plug-in or system fonts. ±
  • Font anti-aliasing - Valid values are 1-bit(no anti-aliasing) , 2-bit and 4-bit. ±
  • Graphics anti-aliasing - 1-bit , 2-bit and 4-bit. ±
Saving Capabilities

Full multi-page write support is provided by this module for the PDF format. You can append, insert, replace or delete a specified page in the generated PDF file.

The plug-in gives you a wide range of control options for the resulting image data in terms of compression. These include:

  • No compression, where the image is embedded inside the file without any compression.
  • Compressed using CCITT Group 3, 1 dimension. For 1-bit images.
  • Compressed using CCITT Group 3, 2 dimensions. For 1-bit images.
  • Compressed using CCITT Group 4. For 1-bit images.
  • JPEG compression and YUV 4:4:4 color space loss-less. Bits per pixel: 8 for grayscale, 24 for color.
  • JPEG compression and YUV 4:2:2 color space. Bits per pixel: 8 for grayscale, 24 for color.
  • JPEG compression and YUV 4:1:1 color space. Bits per pixel: 8 for grayscale, 24 for color.
  • JBIG2 compression. Bits per pixel: 1.
  • The plug-in also gives you control over the type of encoding to be used in order to change compressed image data into a text encoded format. The text encoding techniques include:
    • No text encoding at all.
    • Use ASCII 85 text encoding algorithm.
    • Use ASCII HEX text encoding technique.

Encryption/Decryption

  • RC4 40-bit key encryption.
  • RC4 128-bit key encryption.

Support for User password, Owner password permissions.


Advanced PDF Compressor Plug-in (included in the PDF Write Plug-in)

The PDF Plug-in supports PDF compression through the PDF Compressor. Through Mixed Raster Content (MRC) segmentation, this compressor can be used to break down a page/image into smaller segments, saving each segment using compression appropriate for that segment. Thus, one page of a PDF file may have an image that is compressed using JPEG compression, some text that is compressed using JBIG2 compression, and another area that is compressed using CCITT compression. This whole process works to provide a PDF file with better compression and better quality than just a standard Raster PDF file.

Advanced PDF Compression includes the following features:

  • Supports many compression types:
    • ZIP ( Flate compression )
    • LZW
    • FAX CCITT ( G3 1D, G3 2D, G4 )
    • JBIG2
    • Lossless JPEG
    • JPEG ( YUV 4.4.4, YUV 4.2.2 and YUV 4.1.1 )
  • Works in 2 modes in the page level:
    • MRC mode: enables the segmentation of the source image and then compresses the resulting segments.
    • Normal mode: inserts the image into the PDF file without segmentation.
  • Produces v1.4 (Adobe Acrobat 5.X) PDF files.
  • Provides advanced options to control the process of adding the segments to the PDF file.
  • Provides input profiles to specify source image quality. This makes controlling the segmentation process simple and more accurate. The input profiles supported are:
    • Automatic
    • Noisy
    • Scanned
    • Printed
    • Computer generated
    • Photo
    • User: This profile is provided for advanced users.
  • Provides output profiles to specify required output quality. This should also make the segmentation process easier and more accurate. The output profiles supported are:
    • Automatic
    • Poor
    • Average
    • Good
    • Excellent
    • User: This profile is provided for advanced users.
  • Provides control over the compression types that will be used with each type of segment. For example, the user can choose to use the FAX CCITT G4 compression type to handle 1 bit/pixel segments.
  • Background detection is supported. The user can enable background detection which will try to determine the background of the image. In that case, the PDF Compressor will NOT store the background segments, which results in more compact PDF files.
  • Background is created using shapes instead of image segments. This reduces the size of the resulting PDF file.
  • Control over 1Bit and 2Bit segment detection: The user can choose 1Bit segments over 2Bit segments and vice versa. The user can also choose to force 1Bit segments over 2Bit segments and vice versa.

± Some functionality is only included in the Read/Write version.

Without being an administrative hassle, LEADTOOLS PDF Plug-In requires minor runtime licensing based on the deployment of the application you develop.  Several purchase options are available.  For more information, please contact PDS b.v.