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Adjusting Boost and Hue Boost in Aperture

The following tip comes from the Apple Pro Training Series: Aperture 2 book published by Peachpit Press.

Let’s look at two adjustment controls in the RAW Fine Tuning controls group: Boost and Hue Boost. Aperture includes a set ofcamera profiles for all supported cameras.These profiles give Aperture specific details about each camera’s imaging characteristics,and are used to determine what color and contrast adjustments should be automatically applied to the RAW file.These adjustments are done to apply the optimal decode based on the manufacturer ofthe camera.

The Boost slider lets you control the degree to which this default adjustment is applied to your image.By default,the Boost slider is set at full strength,so your image appears with the full level ofcorrection.As you drag the slider to the left,the correction is reduced.The Boost slider is handy for times when you feel your images have too much contrast or are a little too saturated.

Working in conjunction with Boost is the Hue Boost control. The Hue Boost control is used to maintain the hues in the image as contrast is increased with Boost.For example,if an image has both the Boost and Hue Boost controls set to 1.00,the colors will be pinned to their pure color values.This works very well for nature shots but can create oversaturated skin tones.

  1. Select an image in the Viewer.



  1. Press F to enter Full Screen mode.
  2. In the RAW Fine Tuning controls group,drag the Boost slider. A value of 0.00 applies no contrast adjustment to the RAW file during decode.A value greater than 0.00 increases the contrast adjustment to the RAW file.Using a value of1.00 applies the full Apple-recommended contrast adjustment for the specified camera model.Depending on the image,you may need to lower Boost.
  1. In the RAW Fine Tuning controls group,drag the Hue Boost slide.Using a value of0.00 preserves the original hues in the image in relation to the Boost adjustment.A value greater than 0.00 increases the hue adjustment during the RAW decode.


The contrast in the image is slightly reduced,but the colors are enriched. Your image should appear slightly darker and you’ll probably see some change in color.As the contrast in the image is reduced,the shadows will brighten up a little bit. Overall,the image will appear a little more flat.In many cases,a flatter image will be more pleasing than an image with harsh contrast.

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