Hi Dave,
if suitable background subtraction does not help to get continuous
lines (did you try 'Subtract Background' or the background
subtraction of the 'Fast Filters' at
http://imagejdocu.tudor.lu/ with
various options?):
If the spacing between the lines is larger than the longest gap,
dilate the thresholded lines (Process>Filters>Maximum or Minimum
might be better because it has a circular, not square kernel). Then
skeletonize the lines.
Michael
________________________________________________________________
On 3 May 2010, at 20:31, Dave Luzi wrote:
> Hi, I have not posted here before and if my request is unclear feel
> free to inform me. I have images where I have taken pictures of a
> surface and use line lasers to illuminate the surface in order to
> obtain elevations. Each image has 5 laser lines. The processing
> into real world coordinates is done in Labview, but I am
> preprocessing the images in ImageJ. Currently, I run a macro where
> I despeckle, subract a value and multiply a value of an image in
> order to reduce noise and light for processing. Unfortunately some
> of the laser lines either are not continuous or the pixel values
> are not high enough above my processing threshold. As a result I
> have to go through each image to ensure that the laser lines are
> complete ( tracing lines by the cursor and filling in the spaces),
> there are 90 images per sample and I have about 100 samples
> (current time is 4-5 min per image---so I will be busy for a long
> time). Is there a way to run a macro which would interpolate
> between gaps in the laser automatically?
>
> I am unsure whether to append an image file as an example they are
> 1281 KB, if this would help please let me know and I can post an
> example.
>
> dave
Locked
