Getting the pixel-coördinates
Getting the pixel-coördinates
- Subject: Getting the pixel-coördinates
- From: Bastiaan Roos <email@hidden>
- Date: Wed, 2 Nov 2005 14:57:21 +0100
Dear readers,
I just signed up for this mailinglist and i hope there will be people
outthere who can help me with some pointers or examples.
But before i will get to my question you have to understand what it
is for, so here it goes!
I am building a 3d scanner, i am using a laser which makes a straight
line onto an object. With a digital camera i make a photograph. By
turning the table a degree at the time i will end-up with 360 images.
These images need to be processed, but first they need to be cleaned
from unwanted information, so with a bit of tweaking the end result
should be a black and white image with no tones in between. This i
can manage myself.
Now the part that i am having a question about. a laserline is nice
but it ends up in a photograph as a thik line. so i want to filter
that and make it 1 pixel for each row, meaning i only want the outer
pixel to remain in the image so i'll end-up with the contour or shape
of the object as a 1 pixel line.
example as a demonstration.
original file
XXX
XXX
XX
XXXX
After Filtering (read removing everything on the left accept the
outer right pixels)
X
X
X
X
Hope this makes sence, the X are ofcourse white pixels presenting the
laserline captured in a digital file. If i can manage to filter all
unwanted pixels i will end-up with a much more cleaner data file
which will end in a better quality 3d object.
Anyway if somebody can help me point out on how to approach such a
filter that would be very much appreciated.
Question number 2:
If i can manage to filter out all unwanted pixels, how can one
capture the coordinates of those "white pixels", i need the
coordinates to be written in a textfile.
If anyone has a cleu on how to approach this or can point me towards
sample source then i would really appreciate it
kind regards Bastiaan
Sorry for the bad english!
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