Fill in a colour in an area given by a pixset
Paint all pixels in pixset px with the same colour
colorise(im, px, col, alpha = 1)
im |
an image |
px |
either a pixset or a formula, as in imeval. |
col |
colour to fill in. either a vector of numeric values or a string (e.g. "red") |
alpha |
transparency (default 1, no transparency) |
an image
Simon Barthelme
im <- load.example("coins")
colorise(im,Xc(im) < 50,"blue") %>% plot
#Same thing with the formula interface
colorise(im,~ x < 50,"blue") %>% plot
#Add transparency
colorise(im,~ x < 50,"blue",alpha=.5) %>% plot
#Highlight pixels with low luminance values
colorise(im,~ . < 0.3,"blue",alpha=.2) %>% plotPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.