lennon {wavethresh} | R Documentation |
The lennon
matrix has 256 rows and 256 columns and
integer values in 0:192
which are inverted image gray
scales, i.e., 0 means white and 192 is dark.
There are a few dark speckles on the image.
John Lennon (19xx-19xx) was the composer/leader of the legendary Beatles.
R format and 8bit packing by Martin Maechler
From Guy Nason, G.P.Nason@bristol.ac.uk
data(lennon) str(lennon) tlennon <- table(lennon) plot(names(tlennon), sqrt(tlennon), type = "h", ylab = "tlennon __ sqrt scaled", yaxt = "n", main = "Gray value distribution of `Lennon'") atl <- pretty(tlennon, 8) axis(2, at=sqrt(atl), labels = formatC(atl,wid=1), las=2) image(lennon, zlim = c(0, 192), col = gray(127:0/128))# white to dark image(lennon, zlim = c(-10, 240), col = gray(127:0/128))