AIM: Gamma DeepSpace filter

Accurate Image Manipulation for Desktops

DeepSpace Filter
Filter Name | Gamma
Compatibility | Adobe Photoshop 5.0 and later.
RGB Workspace | This filter does not require any specific RGB working space.
Description | Provides accurate gamma space conversions using full bit-depth in both modes, no interpolation.
Installation | Download and copy all files from the zip archive into the /photoshop/plug-ins directory.

Setup

Open a higher bit-depth image (or convert a 8-bit/channel image to the 15-bit mode, then enter to the filter dialog and press Alt+g to open the Define screen settings -dialog.

Enter the system gamma space that is the gamma value from the Adobe Gamma utility (or from other system calibration utility) not the gamma value from the RGB setup.

This one-time-only step is needed in order to have the image in the preview box to appear correctly.

Sliders | G (.01) | Gamma value (multiplied by 100).
Selection Dropdown | Gamma Compensate | Applies up-gamma (at 1/gamma).
Gamma Linearize | Applies down-gamma (at gamma).
Usage | To linearize a gamma compensated image such as those downloaded from the Web, choose Gamma Linearize from the selection dropdown and adjust the G slider for good image appearance, this is usually gamma 2.50 (250 on the slider). To publish a linear image to the Web (first make a copy so that you do not damage the original) choose Gamma Compensate from the selection dropdown and set the G slider to gamma 2.50 (250 on the slider).
Author | Timo Autiokari.
Homepage | Accurate Image Manipulation for Desktops
Usage Right | Free.
Distribution Right | Distribution is prohibited.
Filter Engine | FilterFormula v 1.13, by ATS/Graphics (extended version for 16-bit images).