Color Reduction - Janome DigitizerPro Instruction Book

Image without outlines
Image with outlines
Image clean up
In practice, cleaning up scanned images may
involve any one or a combination of the following
techniques:
reducing the number of colors
adding or emphasizing outlines
removing noise, dithering or anti-aliasing
eliminating unnecessary detail
cropping sections
eliminating backgrounds.
See also Choosing suitable

Color reduction

Sometimes an image looks clean but extra colors
have been introduced during scanning or in a
graphics package. Color reduction means reducing
the actual number of image colors in order to
eliminate unnecessary detail and reduce each
block to a single color. Color reduction also cleans
the image, removing noise and anti-aliasing if
present. This in turn helps minimize the number of
trims and color changes required in the resulting
embroidery design. Reduce colors in a
non-outlined image using the Image Preparation
tool and in an outlined image using the Outlined
Image Preparation tool.
Color reduction should only be applied if the loss of
detail does not affect the image shapes. Before
color reduction, the colored areas in the image
below include many colors. After reduction, each
area is reduced to a single color. The detail is
preserved.
artwork.
JANOME Embroidery Software Instruction Book
Chapter 13 Preparing Images for Automatic Digitizing
Image before color reduction
If you are scanning images, make sure you scan
them correctly for best results. See also
artwork into EasyDesign.
Image scanned in RGB color
mode, then colors reduced to 8
Be aware that the Image Preparation tool is
good at removing noise and anti-aliasing but not so
good at processing dithering in non-outlined
images. By contrast, the Outlined Image
Preparation tool is excellent at processing
dithered colors as it averages all pixels within a
defined outline. See also
Image Preparation tool used with non-outlined image
– dithered color blocks not completely cleaned, edges
fuzzy
Outlined Image Preparation tool used with outlined
image – dithered color blocks cleaned, edges sharp
Outline sharpening
Outline sharpening means more clearly defining
the outlines bordering distinct color blocks or
Image after color reduction
Scanning
Image scanned in 256 color
mode, then colors reduced to 8
Inserting images.
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