Accurate Image Manipulation for Desktops

Color Spaces Filter

Description

Provides some color space conversions.

Selection Dropdown

RGB to HLS and HLS to RGB
HLS conversion uses the Hunt model. The Hue, Lightness, Saturation the channels will be presented on the Red, Green and Blue channels respectively.
HLS definition specifies the Hue as an angle from 0 to 360. Since the 8-bit space only allows the 256 levels the Hue is compressed, 0...255 is full circle. This gives a small inaccuracy to the conversion.

In this HLS specification the Lightness is not accurate luminance.

AIM RGB to YCrCb and YCrCb to AIM RGB
Y, Cr, Cb channels will be presented on the Red, Green and Blue channels respectively.
AIM RGB to CIE_XYZ and CIE_XYZ to AIM RGB 
X, Y and Z channels will be presented on the Red, Green and Blue channels respectively. Level 255 represents 1 in XYZ space.
AIM RGB to Gray 
Converts a color image or selection into gray.

Notes

Since the R, G and B channels are used for representing these extra color-spaces, (there is no way around this since these are not internal color-spaces to Photoshop) the composite RGB view will be quite useless. Any filtration has to be performed on the individual target channel.

The AIM RGB is:

  • Trinitron primaries
  • Color temperature 6500K (Daylight)
  • Gamma 1.0

Sliders

No sliders.

Author

Timo Autiokari. Homepage: Accurate Image Manipulation for Desktops

Usage and Distribution Rights

Free to download and use, distribution prohibited.

Filter Engine

FilterFormula v 1.1, by ATS/Graphics