Operation Manual

534 | Corel DESIGNER X7 User Guide
The tone curve shows the balance between the shadows, midtones, and highlights of an image. The original
(x) and adjusted (y) pixel values are displayed side by side when you drag the tone curve. This example shows
a small adjustment to the tonal range, in which pixel values of 152 are replaced with pixel values of 141.
You can fix problem areas by adding nodes to the tone curve and dragging the curve. If you want to adjust specific areas in an image, you
can use the Eyedropper tool and select the areas in the image window. You can then drag the nodes that appear on the tone curve to
achieve the effect you want.
Original image (left); the image with adjusted tonal range (right)
The histogram lets you view the adjusted tonal range and evaluate the results. For more information about histograms, see “Using the
histogram” on page 529.
To fine-tune your adjustments, you can choose a curve style from the Style list box. For example, you can redraw the curve by using freehand
lines or straight line segments.
You can adjust the color and tone of an image by applying a preset. To access a preset, click the Open button to the right of the Presets
box. You can also save tone settings as presets to use with other images.
In addition, you can equalize the tonal range of an image by clicking Auto balance tone. To specify the outlying pixels (clipped pixels) at
each end of the tonal range, you can click Settings and type values in the Auto-adjust range dialog box.
Transforming color and tone
You can transform the color and tone of an image to produce a special effect. For example, you can create an image that looks like a
photographic negative or flatten the appearance of an image. To transform the color and tone of images, you can use the following effects:
• Deinterlace — lets you remove lines from scanned or interlaced images
• Invert — lets you reverse the colors of an image. Inverting an image creates the appearance of a photographic negative.
• Posterize — lets you reduce the number of tonal values in an image. Posterize removes gradations and creates larger areas of flat color.
To transform color and tone
1 Select a bitmap.
2
Click Effects Transform, and click any of the following: