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Multi layer raster markup and editing
A document may consist
of several layers. Think of the layers as a stack of transparent sheets,
each containing an image. However, the fixed background sheet in the
stack is solid white, and consequently is not transparent. If you have
loaded a color image, this image will replace the solid white
background.
 When
looking at the stack from the top, you see the content of each sheet
(layer) superimposed on the bottom sheet. This stack of layers
corresponds to your document. You may change the stacking order of your
layers or the color of each layer. This makes it easy to distinguish
between each layer in the stack.
Raster editing may be performed in any activated layer like text
insertion, lines, dimension lines and any other raster function
available in PixEdit.You may also move or copy information from one
layer to another. In addition, your document can be merged to a single
layer if needed.
Automatic layer separaration of both color and monochrome
documents are available. For example, you may want to separate thin and
thick contour lines into two different layers in a monochrome scanned
map, and remove all text with a specific size to a third layer. By
carefully selecting parameters for the different filters, you may save
manual processing when information in scanned maps or other types of
documents needs to be separated.
Automatic layer separaration of color images to different monochrome
layers is a useful feature for extracting colored lines and markups from
a scanned engineering document or map. For example, a map with different
colored power lines may be separated to several monochrome documents in
just a few seconds.
Another useful feature is the compare layer function. The following
compare functions are available:
Common graphics: Common black information in the two source
layers is merged onto the destination layer. If the Affect source option
is selected, the common graphics on the two source layers are erased.
Merge graphics: All black information in the two source layers is
merged onto the destination layer. If the Affect source option is
selected, the graphics on the source layers are erased.
Difference between layers: Graphics which appear on one layer but
not on the other, i.e. the difference between the two layers, are merged
onto the destination layer. If the Affect source option is selected, the
graphics which appear on one source layer but not on the other are
erased.
Unique graphics in first layer: Graphics present in the first,
but not in the second layer are merged onto the destination layer. If
the Affect source option is selected, the graphics found only on the
first source layer are erased. The second source layer is not affected.
Unique graphics in second layer: Graphics present in the second,
but not in the first layer are merged onto the destination layer. If the
Affect source option is selected, the graphics found only on the second
source layer are erased. The first source layer is not affected.
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