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JPEG2000 derivatives

Page history last edited by Monica 5 years, 6 months ago Saved with comment

Instructions for creating JP2 files for online access

 

Batch Process

An automated batch conversion process is available off the digital project server. An overnight script will batch create JP2 files using kakadu (command line) software. Also, an EXIF script will transfer any technical metadata and copyright info that was originally embedded in the master tiff file to the JP2 file. For more information on JPEG 2000 file specifications and format policy please see JPEG2000 Profile  

 

WARNING:

Before converting TIFFs check exif data for the following:

  • TIFFs are uncompressed (not LZW).  If compressed, the Jpeg2000 script will not work.
  • Confirm TIFFs are flat, with no layers.
  • TIFFs use an RGB based color profile
  • These technical specs are outlined here: Using exiftool for the QC process

 

 

Steps:

  1. Ensure master files (*.tif) have embedded copyright information
  2. COPY master files to conversion folder "JP2Convert"
  3. An overnight job will perform the batch conversion from Tiff to JP2 format
    • JP2 files will be output to a date stamped subfolder
    • TIFF master files copied to the "JP2Convert" folder will be deleted
  4. MOVE subfolder of the newly created JP2 files to the appropriate digital project folder and then upload JP2 files to IR record per project guidelines

 

  • Please note that the "JP2Convert" folder is a temporary space, and files should not be stored long term in this directory.

 

 

Single file creation

Note: Use this option when immediate file creation is needed. Otherwise, recommend using batch conversion process for convenience and to maintain consistency in overall file specifications.

 

  • Open Photoshop CS5 (if using an earlier version, you must have installed the add-on for jp2 file support)

  • Open Tiff image

  • select File > Save as

  • Select format JPEG2000

  • Must manually key in extension (.jp2) to filename and press save

    • Photoshop will automatically save as JPF extent so need to over write the extension as last step

    • the mime type jp2 must be used to work with djatoka (jpeg 2000 viewer software)

  • In the 'Save As JPEG2000' window, make sure following settings are selected (Include technical metadata, JP2 compatible, 1024 x1024 tiles) and press ok

 

 

 

 

  • As a final confirmation, open windows explore and confirm file extension is JP2

 

 

 

 

 

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