Restoring Images of Poor Quality
Brief description:
In this
lesson we give you some recommendations about restoring images of poor
quality.
How
do you work with a raster image of poor quality? There isn’t much choice
– either redraw it or restore it with a hybrid editor (vectorization of
such images produces poor results).
The
purpose of this section is not to discuss the plus and minus points of
each method, but to provide you with some ways of restoring scanned documents
of poor quality.
- Separating an image by size – can be used for blueprints, images on dark backgrounds,
with lots of speckles.
Detailed information is provided in section Separating
Monochrome Images by Size.
- Editing selected raster objects (modifying their properties, geometry using
«grips» and others.)
Detailed information is provided in section Editing data, selected
with object selection methods.
- Tracing in smooth mode.
- Tracing in vector producing mode. Editing and rasterizing the obtained vector
object.
Detailed information is provided in section Tracing
Modes and Commands.
- Drawing missing raster lines in Raster drawing mode.
- Editing raster texts.
Example
of restoring an image:
 |
Original
image fragment |
 |
Choosing
and editing the axe line |
 |
Result of
editing the axe line |
 |
Tracing the
curve in smooth mode |
|
|
Hatch
on the original raster image |
|
|
Tracing the
hatch in Create Vector and Erase Raster mode |
|
|
Rasterizing
the vector hatch |
Then
you can apply the following actions:
|
|
|
|
Edited
raster image
|
Select
the whole raster image (or fragment)
|
|
|
|
|
Delete
the raster fragments you need from the selection
|
Remove
the selected speckles
|
|
