Quick links to procedures on this page:
Adjusting the color and tone of raw camera files
You can adjust the color and tone of an image by using the following settings.
Color depth
Color depth refers to the number of colors an image can contain. One of the advantages of using raw camera files is that they can contain more colors than photos saved as JPEG or TIFF files. This greater number of colors makes it easier to reproduce colors accurately, reveal detail in shadows, and adjust brightness levels.
The Camera Raw Lab lets you process the raw camera files as 48-bit or 24-bit images. 48-bit images offer more accurate color representation and prevent loss of image quality during retouching. Note that some of the special effects available in Corel PHOTO-PAINT cannot be applied to 48-bit images.
White balance
White balance is the process of removing unnatural color casts from images so that image colors appear as they do in real life. White balance takes into consideration the lighting conditions in which a photo was taken and sets the color balance to produce realistic image colors.
By default, when a raw camera file is brought in to CorelDRAW, it reflects the camera setting for white balance. This setting appears as the preset As shot in the White balance list box. If you are not satisfied with this setting, you can have the white balance adjusted automatically by choosing the preset Auto. You can also apply any of the following presets: Daylight, Cloudy, Shade, Tungsten, Fluorescent, or Flash. These presets let you simulate different lighting conditions.
Raw camera image with incorrect white balance (left); the same image with adjusted white balance (right)
In addition, you can use the Eyedropper tool to automatically adjust the contrast in an image according to the white or gray point that you sample in the preview window.
If the White balance options do not produce the results you want, you can use the following controls to remove color casts:
Tonal adjustments
You can use the following controls to adjust the tone of raw camera files.
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Brightness slider — lets you brighten or darken an entire image. If you want to darken only the darkest areas of an image, you must use the Shadow slider.
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Using the histogram
While you are making adjustments, you can view the tonal range of the image on the histogram to check for any clipping of shadow or highlight areas. Clipping is the shifting of image pixels to white (highlight clipping) or black (shadow clipping). Clipped highlight areas appear completely white and contain no detail; clipped shadow areas appear completely black and contain no detail.
The button on the left side of the histogram displays a warning if the image contains shadow clipping. The button on the right side of the histogram displays a warning if the image contains highlight clipping. You can also choose to apply shading to the clipped areas in the preview window.
To adjust the color and tone of a raw camera file |
If you are not satisfied with the results, you can set the white point more precisely by using the Eyedropper tool to sample a white or gray color in your image.
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To change a color or tone setting one increment at a time, you can click in the box to the right of a slider, and press the Up or Down arrow keys.
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You can undo or redo the last correction you made by clicking Undo or Redo. To undo all corrections, click Reset to original.
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