"David Pantoja" on wrote...
| Hi everybody:
|
| I'm trying to rescue informacion in document's images, the documents has
| writed in handwritring key. the time and the chemical composition of
| documents produce loss information in the traces, I need recover it.
|
| an original photo is :
|
| http://idealtrece.dyndns.org/hi/originalimage.png
|
| an image after this command detect the edges in the photo:
|
| convert -edge 5 originalimage.png edgesgoodbadnoise.jpg
|
| and obtain this:
|
| http://idealtrece.dyndns.org/hi/edgesgoodbadnoise.png
|
| this command is very useful for me, recover all information in the photo,
| (handwritng keys), but I want to eliminate the noise. produced in the edge
| detect process.
|
Well I would start by first tring to improve the overall contrast of the
image, to try and remove the background noise.
You can try -sigmodial-contrast, with various settings, which can vary
from no-change to a full threshold at whatever level you like.
Some normalization may also help, with removing the extreme limits
using -contrast-stretch This is a linear greyscale stretch of the
image.
Only after you have cleaned up the image would I attempt to use
edge detection, or better still -lat (local adaptive threshold)
Also the new -adaptive-sharpen (IM v6.2.7-3 onward) may be useful
to remove any fuzzyness around the lines.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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