Search found 2 matches

by edsw
2017-08-29T17:41:56-07:00
Forum: Users
Topic: Using -fx on a bilevel image
Replies: 3
Views: 2052

Re: Using -fx on a bilevel image

Thank you, fmw42 and snibgo.
White being 1.0 and black 0.0,
`convert file1.bmp -fx "p[0,0]||((p[-1,0]+...+p[-1,-1])>5.1)" file2.bmp'
does what I meant.
The 3x3 window approach does not let treat the centre differently, does it?
And, if it does not, polygonal concavities make things difficult.
by edsw
2017-08-29T16:21:40-07:00
Forum: Users
Topic: Using -fx on a bilevel image
Replies: 3
Views: 2052

Using -fx on a bilevel image

I am trying to turn white those black pixels of a bilevel image that have less than 3 black neighbours. The original image is predominantly white. At least two things do not work as expected. (1) `convert file1.bmp -fx "p[0,0]&&((p[-1,0]+...+p[-1,-1])>2.7)" file2.bmp' works long and turns several wh...