Setting the White Balance


For this exercise, let's exit the Full Screen mode and work with the Adjustments Inspector to adjust the white balance of another image.

The white-balance filter is extremely powerful when used with RAW image data. Since Aperture is nondestructive, you can adjust the white point of RAW images at any time without degrading the original master file.

1.

Press F to exit Full Screen mode.

2.

If your window arrangement has been altered, choose Window > Layouts > Adjustments and Filters to change your window to the Adjustments and Filters layout.

3.

Click anywhere in the Browser to make it active and press Command-A to select all the images.

4.

Choose Stacks > Unstack, to unstack the images, as we will work with them individually during this exercise.

5.

From the Browser, click to select Tibet 05 096.

6.

To the right of the Viewer is the Adjustments Inspector. Click the disclosure triangle next to Exposure and White Balance to open the controls.

You can access the filters and effects through an Adjustments HUD (heads-up display) or through the Adjustments Inspector.

The Adjustments Inspector shows a histogram revealing the distribution of luminance. You can also choose to view RGB color values in your image. Below the histogram are the basic filters that are always visible in the Adjustments Inspector: exposure, levels, and white balance. Notice that they are inactive by default. They become active as soon as you make adjustments to any of their controls.

Note

A HUD (heads-up display) is a floating control panel that can be placed anywhere onscreen. It allows you to design your own workspace.

Let's make a little more room in our Adjustments pane before we begin altering the image.

7.

Place your pointer between the Adjustments Inspector and the Metadata Inspector panes. Click and drag downward to expand the Adjustments Inspector pane.

8.

In the Adjustments Inspector, click the eye dropper beneath the White Balance check box.

9.

Mouse over your image to identify a white point. Try a white area of her eye, or her shirt.

A special picking Loupe appears with a small center square indicating the pixel samples.

10.

Click to select a white point.

Look at the White Balance filter. The Temperature slider has moved. You can also manually move the slider to visually set a temperature for an image. You can return to the image at any time to adjust the white balance.

Note

Although you may find the White Balance filter is useful for images that were not acquired as RAW files, you will also observe that more extreme changes may begin to noticeably affect the quality of such images.




Apple Pro Training Series. Getting Started with Aperture
Apple Pro Training Series: Getting Started with Aperture
ISBN: 0321422759
EAN: 2147483647
Year: 2003
Pages: 110

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