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Photo editing programs are easy to learn as they
usually include comprehensive "How-to-do" instructions and "step-by-step" tutorials. Most often
it is needed to convert an image file to another image file format to suit the image for appropriate display medium.
See the table of Graphic Formats to convert the image file accordingly.
Computer generated images and imaginary has changed
how we create and manipulate graphics, animation and movies. Anybody can have their own master pieces done at home
with the help of computers and related peripherals.
Best photographic results are achieved with a photo editing software/hardware combinations. There is quite a number
of these utilities available on the market. Software program should support multiple object layers and rendering
of lighting effects. These programs are installed on the computer's hard disk from the CD disc or installation
file that is available as a downloaded file through the Internet.
Using adjustment filters
Improve the quality of images by changing their color and tone. Corel PHOTO-PAINT filters let you change
the hue, saturation, lightness, balance, mixture, and behavior of the colors in images. Corel PHOTO-PAINT also
offers tools and effects that you can use to alter the shadows, midtones, and highlights in images. You can apply
adjustment filters to an entire image or to part of an image using a lens. For information about lens, see "Working
with lenses."
Level Equalization
The Level Equalization filter lets you change shadow, midtone, and highlighted areas by redistributing shades from
darkest to lightest. Level Equalization lets you preserve shadow and highlight detail that is lost when you adjust
the brightness, contrast, and intensity of the tone of an image. You can also use the Level Equalization filter
to create color gradations on posterized images; to lighten or darken any combination of shadows, midtones, or
highlights; to compress brightness values to printable limits; and to adjust the gamma curve (midtones).
Local Equalization
The Local Equalization filter enhances the contrast near image edges and reveals details in both light and dark
regions. It works in a fashion similar to the Auto Equalize filter; however, instead of using the entire image
to construct the histogram, only neighboring pixels are used.
Sample/Target Balance
The Sample/Target Balance filter lets you correct the color of an image by shifting color values from a sample
color to the target color you choose from a color model. You can choose sample colors from the low-point (shadows),
mid-point (midtones), and high-point (highlights) color range in an image.
Tone Curve
The Tone Curve filter lets you perform color corrections precisely by controlling individual pixel values. You
can pinpoint a problem area and produce a subtle or pronounced change in that area, which dissipates according
to the tone curve as you move away from the targeted area. The Tone Curve filter lets you take current pixel brightness
values as input and change them to different values. The response curve represents the balance between shadows,
midtones, and highlights.
Auto Equalize
The Auto Equalize filter performs a flat equalization of the shadows, midtones, and highlights in an image by automatically
redistributing the significant pixel values throughout the tonal range.
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Brightness-Contrast-Intensity
The Brightness-Contrast-Intensity filter lets
you change the brightness, contrast, and intensity of image tones. You can shift pixel values up or down the tonal
range. Adjusting the brightness lightens or darkens all colors equally. Contrast and intensity usually work together,
because increasing the contrast can wash out detail in shadows and highlights. Increasing the intensity can restore
this detail.
Color Balance
The Color Balance filter lets you change the
mixture of colors in an image. This allows you to shift between CMY color values and RGB color values. For example,
if you want to tone down the red in a photo, you can shift the color values from red to cyan. You can also change
the hue values to change the colors used in an entire image.
Gamma
The Gamma filter corrects tones in an image by
taking into account the human eye's percent of neighboring values. For example, if you place a circle filled with
10-percent-gray on a black background and an identical gray circle on a white background, the circle surrounded
by black appears lighter than the circle surrounded by whiteeven though the brightness values are identical. The
Gamma filter lets you pick up detail in a low-contrast image without significantly affecting the shadows or highlights.
The Gamma filter affects all image values but it is curve-based; this means changes are weighted toward the midtones.
Hue/Saturation/Lightness
The Hue/Saturation/Lightness filter lets you
change the hue, saturation, and lightness values of an imageall at once or channel by channel. When you change
the hue, saturation, and lightness values of the colors in an image, you change the color intensity by changing
the richness and white values or by changing the color entirely. Hue represents color; saturation represents color
depth or richness; and lightness represents the overall percentage of white in an image.
Selective Color
The Selective Color filter lets you change color by changing the percentage of the component process colors (CMYK
values) in a color spectrum (reds, yellows, greens, cyans, blues, and magentas). You can also use this filter to
add process color to the grayscale tonal component of an image. Selective color modifications increase and decrease
the percentage of cyan, magenta, yellow, and black pixels that make up each primary color in the color spectrum.
For example, decreasing the percentage of magenta in the reds spectrum results in a color shift toward yellow.
Conversely, increasing the percentage of magenta in the reds spectrum causes a color shift toward magenta and an
increase in overall red. The extent of color modification depends largely on the adjustment percentage method you
choose.
Replace Colors
The Replace Colors filter lets you replace one image color with another color. Depending on the range you set,
you can use the Replace Colors filter to replace one color or to shift an entire image from one color range to
another.
Desaturate
The Desaturate filter automatically reduces the
saturation of each color to zero, removes the hue component, and converts each color to its grayscale equivalent.
This creates a grayscale image without changing the color mode.
Color Hue
The Color Hue filter provides a thumbnail of
an image that shows how the image will look with the addition of a particular color hue.
Color Tone
The Color Tone filter lets you change brightness,
saturation, and contrast when you click a series of sample thumbnail buttons. The thumbnail buttons let you preview
the appearance of an image as color tone adjustment techniques are applied. The intensity of the effect increases
each time you click the button.
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Working with the Brightness-Contrast-Intensity filter
Adjust the brightness, contrast, and intensity of image tones.
Brightness: lightens or darkens the colors equally
Contrast: adjusts the difference between the light and dark colors
Intensity: brightens the light areas or darkens the dark areas
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Working with the Color Balance filter
Adjust the color balance in an image by shifting the colors between complementary pairs of the primary (RGB) and
secondary (CMY) colors. Adjusting color values in this way is useful for correcting color casts. For example, if
a color appears too red, you can shift its values from red (RGB) to cyan (CMY).
Shadows: adjusts the dark tones
Midtones: adjusts the medium tones
Highlights: adjusts the light tones
Preserve Luminance: maintains brightness levels while adjusting the color balance
Cyan-Red: sets color levels for the Cyan and Red color channels
Magenta-Green: sets color levels for the Magenta and Green color channels
Yellow-Blue: sets color levels for the Yellow and Blue color channels
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Working with the Gamma filter
Adjust the shadows, midtones, and highlights of an image in a nonlinear fashion, so that the most pronounced changes
occur in the midtones.
Higher values brighten midtones;
lower values darken them.
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Working with the Hue/Saturation/Lightness filter
Adjust the color intensity of an image by using the Hue/Saturation/Lightness filter. This filter alters the richness
and whiteness values or changes the color entirely. Values can be also adjusted across all color channels or in
individual color channels.
Hue: sets the image color
Saturation: sets the color strength
Lightness: sets the amount of white (positive values) or black (negative values) in the colors
Saturation values range from -100 to 100, with -100 resulting in grayscale images and 100 resulting in unnaturally
vibrant colors.
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Working with the Desaturate filter
Reduce the saturation of each color in an image to zero to remove the hue component and to convert colors to their
grayscale equivalents. This creates a grayscale image without changing the color mode.
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Working with the Color Hue filter
Adjust the color hue of an image.
Shadows: adjusts the dark tones
Midtones: adjusts the medium tones
Highlight: adjusts the light tones
Preserve Luminance: maintains brightness levels while adjusting the color hue
More Red adds more red to the image
More Green adds more green to the image
More Blue adds more blue to the image
More Cyan adds more cyan to the image
More Magenta adds more magenta to the image
More Yellow adds more yellow to the image
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Working with the Color Tone filter
Adjust the brightness, saturation, and contrast of an image.
Darker: darkens the image
Saturate: increases the saturation of the image
More Contrast: increases the contrast of the image
Lighter: lightens the image
Desaturate: decreases the saturation of the image
Less Contrast: decreases the contrast of the image
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