Stranica 114 [114]
Camera
RAW conversion Conversion to linear light
123.CR2 Conversion software 123.TIF Nip2 workspace 123.XYZ
(contains ICC profile)
RAW file TIFF file
1
RAW sensor data
Figure 3-2. Flow diagram to illustrate the conversion of a RAW file to a TIFF file by RAW conversion
software and the use of the resulting embedded ICC profile by the nip2 workspace to return the image
to linear light (XYZ).
The instructions below describe the procedure for the conversion of images from RAW into a
standard 16-bit TIFF file, which is the preferred format of the post-processing workspace.
The presets recommended can be applied using either the camera software or external
programs, such as Adobe Photoshop which allows these presets to be saved as a ‘settings’
file which can then be uploaded for batch processing. The example below uses Adobe
Photoshop CS4 Extended but other software versions including freely available open-source
software such as Raw Therapee® can be used to convert images from RAW. Additionally,
free utilities such as the Adobe DNG Converter? are available, which enable the conversion
of camera-specific RAW files from more than 350 cameras to the more universal DNG raw
format. The DNG files can then be opened by external programs for conversion to TIFF files.
A series of files (e.g. BM_raw_adjustment.xmp) with the recommended presets for use with
Adobe Photoshop can be downloaded from: http://www.britishmuseum.org/charisma and
copied to the Application Data\Adobe\Cameraraw\Settings folder. The location of this folder
will vary depending on how the computer is set up but it is typically found in C:\Documents
and Settings.
Alternatively, if the location of this folder is not clear, the settings can be adjusted manually
as detailed below for the first images converted and preset RAW settings files saved for use
with subsequent images.
If carrying out the conversion of images from RAW using other software versions or the
camera software, ensure that the same recommended presets are applied to the image
before conversion to TIFF.
Version No. 1.0 106 Date : 14/10/2013
PROGRAM!