locate_ndl_in_hay {screenshot} | R Documentation |
Locate needle image matrix position in a haystack_image matrix.
Helper function for locate_image()
.
Description
Locate needle image matrix position in a haystack_image matrix.
Helper function for locate_image()
.
Usage
locate_ndl_in_hay(ndl_mt, hay_mt, exact = TRUE, timeout = 5)
Arguments
ndl_mt , hay_mt |
A matrix |
exact |
A logical. Check matching exactly or not. |
timeout |
A numeric for timeout seconds. |
Value
A numeric pair of xy location for needle image.
Examples
haystack_image <- imager::load.example("parrots")
w <- 100
h <- 50
needle_image <- hay2needle(haystack_image, 129, 257, w, h)
hay_mt <- image2gray_matrix(haystack_image)
ndl_mt <- image2gray_matrix(needle_image)
(pos <- locate_ndl_in_hay(ndl_mt, hay_mt))
found <- hay2needle(haystack_image, pos[1], pos[2], w, h)
layout(c(1:3))
plot(haystack_image)
plot(needle_image)
plot(found)
[Package screenshot version 0.9.1 Index]