Corel Draw X4 How To Change Multiple Colors In A Custom Palette To One Of Three Colors?

Quick links to procedures on this page:

Converting images to the paletted color mode

The paletted color mode, too called indexed color style, is frequently used for GIF images on the Web. When yous convert a circuitous image to the paletted color mode, a fixed color value is assigned to each pixel. These values are stored in a compact color table, or palette. Equally a outcome, the paletted image contains less data than the original, and it has a smaller file size. Paletted color mode is an 8-chip fashion that stores and displays images by using up to 256 colors.

Choosing, editing, and saving a color palette

When you modify an prototype to the paletted color manner, yous use a predefined or a custom color palette and then edit the palette by replacing individual colors. If yous choose the Optimized colour palette, you lot tin also edit the palette by specifying a range sensitivity color. The colour palette yous employ to convert the image is chosen the processed color palette, and information technology can be saved for use with other images.

For more than information nigh creating custom color palettes, see Working with color.

Dithering

Paletted images can only contain upwards to 256 different colors. If the original image contains many colors, y'all tin use dithering to create the illusion of seeing more than 256 colors. Dithering creates boosted colors and shades from an existing palette by interspersing pixels of different colors. The human relationship of one colored pixel to another creates an optical mix, so you perceive boosted colors.

Dithering can be done by distributing colors either regularly or randomly. Ordered dithering approximates color blends by using regular dot patterns; as a result, solid colors are emphasized and edges appear harder. Fault diffusion scatters pixels randomly, making edges and colors softer. Jarvis, Stucki and Floyd-Steinberg are methods of fault diffusion.

If your image contains only a few colors and simple shapes, you do not need to employ dithering.

Setting the color range for a custom color palette

When you change an image to the paletted color mode using the Optimized palette, y'all can choose a seed colour, or base of operations color, and a range sensitivity for the seed color. The seed color, and similar colors that fall inside the range settings, are included in the processed color palette. You lot can besides specify how much emphasis to identify on the range sensitivity. Considering the palette has a maximum of 256 colors, emphasizing a seed color reduces the number of colors that fall outside the range sensitivity.

Saving conversion options

After you cull a color palette and set the dithering and range sensitivity for the changing of an image to the paletted color style, you lot tin can save the selected options as a conversion preset that you can utilise with other images. Yous tin add and remove equally many conversion presets equally you want. You tin can also remove the presets you have added.

Converting multiple images to the paletted colour mode

You can change multiple images to the paletted color mode simultaneously. Earlier you perform a batch conversion, you must open up the images in Corel PHOTO-PAINT. All images that you include in the batch are changed using the color palette and conversion options y'all specify.

To convert an image to the paletted color mode

Click Image Convert to paletted (8-bit).

Click the Options tab.

Choose one of the following colour palette types from the Palette list box:

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Uniform — provides a range of 256 colors with equal parts of crimson, green, and blue

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Standard VGA — provides the Standard VGA 16-color palette

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Adaptive — provides colors original to the image, and preserves the private colors (the unabridged color spectrum) in the paradigm

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Optimized — creates a colour palette based on the highest percent of colors in the image. Y'all can also select a range sensitivity color for the colour palette.

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Black Body — contains colors that are based on temperature. For example, black may represent cold temperatures, while red, orangish, xanthous, and white may correspond hot temperatures.

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Grayscale — provides 256 shades of grey, ranging from black (0) to white (255)

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System — provides a palette of Web-safe and grayscale colors

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Websafe — provides a palette of 216 colors that are common to Web browsers

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Choose a dithering pick from the Dithering list box.

Motility the Dither intensity slider to adjust the corporeality of dithering.


Yous tin can also
Save the conversion options every bit a preset	Click Add preset , and type a name in the Salve preset box.
Edit the processed colour palette	Click the Processed palette tab, and click Edit. In the Color table dialog box, edit the colour palette.
Save the processed color palette	Click the Processed palette tab, and click Relieve. Choose the folder where y'all want to save the processed colour palette, and type a filename.

The Ordered dithering option is applied more rapidly than are the error diffusion options Jarvis, Stucki, and Floyd-Steinberg; however, it is less authentic.

You tin choose a custom color palette by clicking the Options tab, clicking Open, locating the color palette file you desire, and double-clicking the filename.

You lot tin load preset conversion options by choosing a preset from the Presets list box on the Options tab.

To set the color range for a custom color palette

Click Image Convert to paletted (8-bit).

Click the Options tab.

Choose Optimized from the Palette list box.

Enable the Color range sensitivity to check box.

Click the Eyedropper tool , and click a color in the paradigm.

half-dozen.

Click the Range sensitivity tab, and specify the settings you desire.

If you lot desire to view the color palette, click the Processed palette tab.

To catechumen multiple files to the paletted color mode

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Click Epitome Convert to paletted (viii-bit).

From the left column, choose each file you lot want to modify.

You can preview an prototype by choosing information technology from the Preview image list box and clicking Preview.