Adobe ADBCD17648MC 사용자 설명서
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USING PHOTOSHOP ELEMENTS 8
Color and tonal correction
Color and tonal correction
Last updated 7/26/2011
Set press target values for images without specular highlights
Use this press targeting method if you don’t have specular highlights in your image. If you do have specular highlights,
use the Levels eyedropper method.
use the Levels eyedropper method.
1
Do one of the following:
•
Choose Enhance
> Adjust Lighting > Levels.
•
Choose Layers > New Adjustment Layer
> Levels, or open an existing Levels adjustment layer.
2
Enter the press target values for the shadow in the left output box and the highlight in the right output box, or drag
the output sliders to set the target values, then click OK.
the output sliders to set the target values, then click OK.
Note: Press values are typically given as percentages of cyan, magenta yellow, and key (black)—CMYK. Photoshop
Elements only supports RGB values of 0-256. So you will need to supply RGB equivalent values to enter in the Levels text
boxes (for example, RGB of 10, 10, 10 may be used for shadows, and RGB of 244 may be used for highlights).
Elements only supports RGB values of 0-256. So you will need to supply RGB equivalent values to enter in the Levels text
boxes (for example, RGB of 10, 10, 10 may be used for shadows, and RGB of 244 may be used for highlights).
More Help topics
Set press target values for images with specular highlights
1
Select the eyedropper tool, and choose 3 By 3 Average from the Sample Size menu in the eyedropper tool options.
This ensures a representative sample of an area rather than the value of a single screen pixel.
This ensures a representative sample of an area rather than the value of a single screen pixel.
2
Choose View
> Actual Pixels to make sure you view the true color and tonal values of your image as you make
adjustments to it.
3
Do one of the following:
•
Choose Enhance
> Adjust Lighting > Levels.
•
Choose Layers > New Adjustment Layer
> Levels, or open an existing Levels adjustment layer.
When you open the Levels dialog box, you still have access to the scroll controls in the document window, the View
menu, and to the Hand and Zoom tools by using keyboard shortcuts.
menu, and to the Hand and Zoom tools by using keyboard shortcuts.
4
To identify areas of representative highlights and shadows in the image, move the pointer around the image, and
look at the Info panel to find the lightest and darkest areas. If the Info panel isn’t open, choose Window
look at the Info panel to find the lightest and darkest areas. If the Info panel isn’t open, choose Window
> Info.
To identify the darkest pixels, press Option and move the Black point slider; to identify the brightest pixels, press
Option and move the White point slider.
Option and move the White point slider.
5
Double-click the Set White Point eyedropper tool in the Levels dialog box to display the Color Picker. Enter the
color values to assign to the lightest area in the image, and click OK. Follow these guidelines:
color values to assign to the lightest area in the image, and click OK. Follow these guidelines:
•
When you are printing on white paper, you can achieve a good highlight in an average-key image using RGB values
of 244, 244, 244. An approximate grayscale equivalent is a 4% dot.
of 244, 244, 244. An approximate grayscale equivalent is a 4% dot.
•
You can approximate these target values quickly by entering 96 in the Brightness (B) text box under the HSB section
of the Color Picker.
of the Color Picker.
•
With a low-key image, you might want to set the highlight to a lower value to avoid too much contrast. Experiment
with Brightness values between 96 and 80.
with Brightness values between 96 and 80.
6
In the image, click the highlight area that you identified. If you accidentally click the wrong highlight, click Reset
and try again.
and try again.