COMPANY: Shapiro Consulting Group | URL: www.asiva.com | TYPE: Plug-in | PLATFORM: Mac, Windows | PRICE: $69
The Asiva Shift+Gain Component plug-in utilizes Asiva's unique curves to allow the user to make nearly seamless selections then facilitates extremely accurate adjustments to the Hue, Saturation, Value and Red, Green, Blue Components of the image in one Filter pass. All 16-bit processing allows for smooth and natural transitions.

* All 16-bit per component processing gives you 256 times the bandwidth and precision of 8-bit.

* Shift or Gain any RGB and/or HSV components precisely, without time-consuming masks.

* Flexible control over how shifting or gaining is applied to an image using adjustable maps (curves) on the Hue, Saturation and Luminance components. Control the roll-off on the maps so all effects appears completely natural.

* Save and load presets for use with other images.

* Control not only the distribution but also the quality and quantity of the effects applied.

* Built-in Color Sampler Tool allows for accurate sampling of the colors in the image that the filter is to be applied.

* A simple interface and a thorough manual make for a sensible learning curve.

Theory of Operation
* Define the source colors you wish to operate on using the built in Hue, Saturation and Luminance (HSV) curves or maps. Sampling the colors in the area/s or an image you wish to affect with the built in Color Sampler Tool is a simple way of selecting these values. Adjusting and fine tuning the curves in the maps allows you to include or exclude certain H or S or V (Luminance) values affected.

* The slope of the curves will define how the filter is transitioned. A near vertical line on your Map will create sharply defined boundaries between where the filter is applied and is not, and a gently sloped curve on the Map will make the boundaries less defined or ‘feathered’.

* Since there are three maps (Hue, Saturation and Luminance) to work with, you will be able to 'feather' those boundaries based on their Hue, Saturation or Luminance value differences. Asiva's curves are so precise, that tedious masking prior to application of the filters are often not necessary. The Shift and Gain filter may also be applied to your Photoshop selections.