Return or set pixel value at coordinates
Return or set pixel value at coordinates
at(im, x, y, z = 1, cc = 1) at(im, x, y, z = 1, cc = 1) <- value color.at(im, x, y, z = 1) color.at(im, x, y, z = 1) <- value
im |
an image (cimg object) |
x |
x coordinate (vector) |
y |
y coordinate (vector) |
z |
z coordinate (vector, default 1) |
cc |
colour coordinate (vector, default 1) |
value |
replacement |
pixel values
at<-: set value of pixel at a location
color.at: return value of all colour channels at a location
color.at<-: set value of all colour channels at a location
Simon Barthelme
im <- as.cimg(function(x,y) x+y,50,50) at(im,10,1) at(im,10:12,1) at(im,10:12,1:3) at(im,1,2) <- 10 at(im,1,2) color.at(boats,x=10,y=10) im <- boats color.at(im,x=10,y=10) <- c(255,0,0) #There should now be a red dot imsub(im, x %inr% c(1,100), y %inr% c(1,100)) %>% plot
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