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Diffstat (limited to 'pgmenhance.html')
| -rw-r--r-- | pgmenhance.html | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/pgmenhance.html b/pgmenhance.html index 3d9eb98e..d1d4a278 100644 --- a/pgmenhance.html +++ b/pgmenhance.html @@ -29,8 +29,8 @@ pgmenhance - edge-enhance a PGM image and writes a PGM image as output. <P>The edge enhancing technique is taken from Philip R. Thompson's -"xim" program, which in turn took it from section 6 of -"Digital Halftones by Dot Diffusion", D. E. Knuth, ACM +"xim" program, which in turn took it from section 6 of +"Digital Halftones by Dot Diffusion", D. E. Knuth, ACM Transaction on Graphics Vol. 6, No. 4, October 1987, which in turn got it from two 1976 papers by J. F. Jarvis et. al. |