Name:         ColorSync 2.0 Photoshop Plug-ins
Version:      1.3
Released:     November 7, 1995 (Reposted June 6, 1997)
Requires:
A Mac OS computers equipped with a 68020 or later processor,
or a PowerPC 601 or later processor, System Software version
7.1 or higher, ColorSync(TM) 2.0, Adobe Photoshop version
2.5.1 or later, or other software that accepts version 4.0
Photoshop Plug-In modules.
Description:
The ColorSync 2.0 Photoshop Plug-In Modules provide an easy way for
you to obtain high quality reproduction of color images.

This software consists of a Disk Copy compressed image, which requires
Disk Copy 6.1 or later to use. Download this software to your hard drive
and then double-click it to use it. Disk Copy is available in the
Utilities folder.

From the Read Me included with this software:

ColorSync(TM) 2.0 Photoshop Plug-In Modules 1.3 Read Me

What are ColorSync(TM) 2.0 Plug-In Modules?

The ColorSync(TM) 2.0 Plug-In Modules provide an easy way
for you to obtain high quality reproduction of color images.
Together with the ColorSync(TM) 2.0 System Extension and the
installed device profiles, the ColorSync(TM) 2.0 Plug-In
Modules ensure that your color images will be reproduced
most accurately on any device. Three Modules (Acquire,
Export, and Filter) are available to fit into any type of
work-flow, and to provide color matching capabilities to the
novice color user as well as to the most demanding color
user.

With the Plug-In's you will be able to: 
* Accurately print the image viewed on your monitor. 
* Accurately print or view the image you have scanned. 
* Embed a profile in your image to be specified as the
  image's source. 
* Make color separations for any press printing condition. 
* Use your in-house device to preview what your image will
look like on the printing press. 
* Execute any custom color matching needed.


What are the system requirements?

Before using any of the modules, you should make sure that: 
* Your Macintosh has a 68020 or later processor, or a
  PowerPC 601 or later processor. 
* Your Macintosh is running System Software version 7.1 or
  higher. 
* The ColorSync(TM) 2.0 System Extension and ColorSync(TM)
  2.0 System Profile Control Panel are installed in the
  Extensions and Control Panels folders, respectively. 
* The ColorSync(TM) 2.0 (or ICC-compatible) profiles for
  your peripherals are installed in "System
  Folder:Preferences:ColorSync(TM) Profiles" folder. 
* You are using Adobe Photoshop version 2.5.1 or later, or
  other software that accepts version 4.0 Photoshop Plug-In
  modules. 


How do I install the software?

If ColorSync(TM) 2.0 is not already installed on your
system, you can download a copy of the ColorSync(TM)
installer disks from any of the on-line services mentioned
at the end of this document.  Please follow the instructions
that are included on the disk before installing
ColorSync(TM) 2.0.

The ColorSync(TM) 2.0 Plug-In Modules are installed by
coping all three into the "Aquire Export" folder in your
Photoshop 3.0 Plug-Ins folder. For Photoshop 2.5, copy all
three directly into the "Plug-Ins" folder. For other
applications that use plug-ins, refer to the documentation
that comes with the application.


Important Definitions

Color matching/color reproduction: 
The process of making a controlled transformation of color
values generated from one device to values intended for
another device.

Profile:
A file containing information about the color reproduction
capabilities of a device, such as a scanner, a digital
camera, a monitor , or a printer. Commonly, two profiles
(source and output) are used during a color matching
session. 

Source profile:
A profile representing a device from which an image was
originated. For example, if an image is scanned in, then the
scanner profile is the source profile. Or, if an image is
created and viewed on the monitor, then the monitor profile
is the source profile. 

Output profile: 
A profile representing a device on which an image is to be
outputted. For example, if an image is to be printed on a
color printer, then the printer's profile is the output
profile. Or, if an image is to be viewed on the monitor, the
monitor profile is the output profile. 

Proofer profile: 
Proofing is the process of using one device to predict the
output of an image on another device. A proofer profile
represents the device which is used for the prediction. For
example, if an image whose output on a color printer is to
be proofed on a monitor, the monitor profile will be the
proofer profile.

Matching style:
Because of the differences among devices' color capability,
different methods exist for applying color matching on an
image. The matching style is usually selected according to
the content of the image . See below.

Perceptual matching style:
A matching style which gives the most pleasing reproduction
given the capabilities of the devices involved. This is the
most commonly used style, especially for reproduction of
photographic images. 

Colorimetric matching style:
A matching style where colors are reproduced exactly the
same as the eye can distinguish. This may result in clipping
of certain colors which can not be reproduced on a device.
Colorimetric matching can further be divided into relative
colorimetric matching and absolute colorimetric matching,
where relative matching accounts for the ability of the
human eye to automatically adapt to the surround white
(e.g., white of the paper the image is printed on), and
absolute does not. Colorimetric matching is most commonly
used for reproducing Logo colors where the exactness of the
color is important. 

Saturation matching style:
A matching style where the vividness of the image is best
preserved. This style is mostly used for reproduction of
graphs and pie charts. 

Matching quality:
The matching quality indicates the overall computation
precision of a particular matching session. Higher
computation precision requires more run-time memory. It is
always best to use the highest matching quality your system
allows.


Using the Acquire Module:

The Acquire Module will import a Tiff image from disk into
Photoshop while applying ColorSync(TM) matching. The Acquire
Module is most convenient to use if you simply want to match
your image for printing from Photoshop, or if you want to
match an image you scanned previously for viewing.

To use the Acquire Module: 

1. In Photoshop, select the "Tiff with ColorSync(TM)
Profile..." from the "Acquire" menu under "File". A standard
file selection dialog box appears prompting you to select a
Tiff image to be imported.

2. Select the Tiff image you want to import and click the
"Open" button. The ColorSync(TM) Acquire Module dialog box
appears. Select the appropriate "Source" and "Output
Profile" for the image, and select the desired "Matching
Style" and "Quality" setting. Refer to the "Important
Definitions" section above for more explanations . 

3. Click the "Import" button to start importing.

Note 1: If the Tiff image to be imported already has a
profile embedded, the embedded profile will show up on the
list of available Source Profiles as an Italic item. 

Note 2: Only profiles whose color space information match
that of the selected Tiff image appear in the list of
"Source Profiles". Therefore, for a Tiff CMYK image, only
profiles that are CMYK based are available as "Source
Profile".

Note 3: Certain Tiff images cannot be imported if they
contain unsupported Tiff image format features such as
compression.


Using the Filter Module:

The Filter Module will apply ColorSync(TM) matching on the
current Photoshop image. The Filter Module is most
convenient for matching an image which is already in
Photoshop without writing it to disk.

To use the Filter Module:

1. In Photoshop, select the "ColorSync(TM) Filter" in the
"Color Matching" menu under "Filter". The ColorSync(TM)
Filter Module dialog box will appear.

2. Select the appropriate "Source" and "Output Profile" for
the image, and select the desired "Matching Style" and
"Quality" setting. Refer to the "Important Definitions"
section above for more explanations. 

3. Click the "OK" button to start filtering.

Note: Due to limitations of the Photoshop Filter Module API,
the ColorSync(TM) Filter Module can only match images
from/to the same color space. Therefore, it cannot match an
RGB image for a CMYK device, and vice versa. 


Using the Export Module:

The Export Module will save the current Photoshop image to
disk as a Tiff image with ColorSync(TM) matching applied. It
is the most flexible module out of the three.

To use the Export Module: 

1. In Photoshop, select the "Tiff with ColorSync(TM)
Profile..." module from the "Export" menu under "File". The
ColorSync(TM) Export Module dialog box will appear. 

2. Select the desired choice from "Processing Selection".
Action for each of the choices are as follows: 

* "Embed" simply embeds into the current image the
selected "Source Profile" with the selected "Matching
Style". No color matching occurs. 

* "Match" applies a matching session using the selected
"Source" and "Output Profile" and the selected "Quality" and
"Matching Style". The "Output Profile" is also embedded in
the output image to indicate that the matched image is now
intended for the device associated with the profile.

* "Proof Matched" applies a proofing session using the
selected "Source", "Output", and "Proofer Profile" and the
selected "Quality" and "Matching Style". "Matching Style" is
applied separately for the source-to-output match AND for
the output-to-proof match. The "Proofer Profile" is also
embedded to indicate that the matched image is now intended
for the device associated with the profile.

* "Custom" enables more extensive matching sessions. 

Click the "Export" button if "Embed", "Match", or "Proof" is
selected and go to step 6. Click the "Select..." button if
"Custom" is selected and go to step 3 below. 

3. "Custom" matching is used for the rare occasion when you
want to perform matching with many profiles. It comes up
with a dialog box with a scrollable list of "Profiles
Selected" and a "Quality" selection that is to be applied
for the entire matching session. 

4. Click the "Add Profile" button to add a profile after the
last element on the "Profiles Selected" list. This brings up
the list of available profiles. Select the desired profile
and the "Matching Style" setting and click the "Add" button.
The "Matching Style" selecting is applied for the match from
the current profile to the next selected profile. The
"Matching Style" of the last selected profile is ignored. 

5. Repeat step 4. as many times as necessary to add more
profiles to the list.  When done, click the "Export Tiff..."
button.  To remove a profile from the list, all succeeding
profiles following that profile must be removed first.  To
remove the last profile from the list, simply select the
profile and click "Remove Profile".

6. The standard save file dialog box will appear prompting
for a name of the image file to be saved as. Enter the
desired file name and click the "Save" button to execute.

Note: An image must be loaded in RGB or CMYK mode in order
for the "Tiff with Color Sync Profile" menu item in the
Export menu item to be selectable.  The item is not
selectable if the image is in indexed mode. 


Where do I go for more information?

* Go to the Apple ColorSync(TM) home page on-line at:
       http://www.colorsync.apple.com/


(c)1995  Apple Computer. Inc.
Apple,  the Apple logo, and Macintosh are trademarks of
Apple Computer, Inc., registered in the U.S.A. and other
countries. Power Macintosh and ColorSync  are trademarks of
Apple Computer, Inc. All other product names are trademarks
or registered trademarks of their respective holders.
Mention of non-Apple products is for information purposes
and constitutes neither an endorsement nor a recommendation.
Apple assumes no responsibility with regard to the
selection, performance, or use of these products.

Updated May 30, 1997