Legacy ImageMagick Discussions Archive

Hi

I am trying to use imagemagick to filter brigth points generated by strong ilumination over a irregular surfaces, like this image (the image is inverted)

https://docs.google.com/leaf?id=0BzexxH ... OTg2&hl=en

I tryed to use the statsfilts scrip with parameter -s 12

The result is better but some points (the bigger ones) are not corrected

https://docs.google.com/leaf?id=0BzexxH ... YTlh&hl=en

is there any way to eliminate these?

Thanks

A.

The links don't work. Perhaps you didn't tell GoogleDocs that anyone could have access.

Ok, now the links should work.

Not sure exactly what you want to do with the bright spots when you say filter them?

#this makes the bright spots black (Make the thresh value smaller to remove more)

thresh=85
convert a2bio.tif \( +clone -threshold ${thresh}% -negate -write a2bio_tmp.png \) \
-compose multiply -composite a2bio_t85.tif

# This is a variation that can set the bright spots to whatever graylevel you want.

thresh=85
color="gray"
convert a2bio.tif \( +clone -threshold ${thresh}% -negate \) \
-alpha off -compose copy_opacity -composite -compose over \
-background $color -flatten a2bio_t85_gray.tif


#this is a median filter that replaces each value with the median of its neighbors (Make the median value larger to filter more)

convert a2bio.tif -median 1 a2bio_med1.tif

#this is similar to the median filter. it is my script, isonoise, it does a median where it is bright and leaves the image alone where not. The threshold determines where to do the median or not.

isonoise -r 1 -t 10 a2bio.tif a2bio_iso_r1_t10.tif


Other types of filtering are possible if you can explain a bit more what you would like to happen

The idea is that these are reflections so this points should be dark (or bright in the inverted images) but I don't know which graylevel they should be.

Well I am experimenting whit your suggestions, thank you very much!