Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 90

WiseImage – User's Guide
By
Depending on the chosen tab, this list allows you to select a binarization method.
For example, if the Range tab is chosen, you can choose Range by Grey, Range by
RGB or Range by HSV.
Channel
You can choose a color information channel type from this list. The term color
information channels stands for the information on the color components of image
pixels by a certain color representation model.
The number of available channels depends on the image type. Every color image
has five channels: Red to store information on red color, Green to store information
on green color, Blue to store information on blue color, Hue to store information on
hue, and Grey to store information on grey color components (brightness) for each
color. For grayscale images only the Grey channel is used.
Channel histogram window
The histogram of the selected channel is displayed in the Channel list. The
histogram is a graphical representation of a color component value distribution by
image pixels, defined by a selected channel. A component value is measured along
the histogram's horizontal axis (lesser values are on the left, greater values are on
the right). Along the vertical axis a normalized number of pixels with the specified
color component value are placed. Thus, the histogram extremes correspond to the
most frequent component values, and the minimums correspond to the least
frequent values.
Depending on the selected binarization method, either one or three triangular
sliders can appear in the bottom part of the histogram. These sliders allow you to
adjust the parameters of the current binarization method, i.e. to specify range
parameters and the threshold level value.
Layer
Allows the specification of a layer name, on which a monochrome image will be
placed after binarization, and a raster image color.
Apply
Starts the binarization procedure.
Template
Used to store and load the parameters for all binarization methods.
Dialog box tabs
There are two tabs in the Binarization dialog box: Range and Threshold. The first
one is used to specify the binarization range parameters; the second is used to
specify the threshold parameters.
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