Locate needle image position on a screenshot image.
Usage
locate_image(
needle_image,
center = TRUE,
exact = TRUE,
timeout = 5,
corner = NULL,
width = 600,
height = 300,
bin_dir = ""
)Arguments
- needle_image
A string of image file path or a cimg class object of imager library.
- center
A logical. TRUE returns center position of needle_image.
- exact
A logical. Check matching exactly or not.
- timeout
A numeric for timeout seconds.
- corner
A string to specify a corner of the display. "top_left", "top_right", "bottom_left", or "bottom_right".
- width, height
A integer to specify width or height of the corner.
- bin_dir
A string for directory name of screenshot.exe on Win.
Examples
if (FALSE) {
sc <- screenshot()
if(sc != ""){
sc_image <- imager::load.image(sc)
w <- 100
h <- 80
pos_x <- 1
pos_y <- imager::height(sc_image) - h
needle <- hay2needle(sc_image, pos_x, pos_y, w, h)
(locate_image(needle)) # center location
pos <- locate_image(needle, center = FALSE)
found <- hay2needle(sc_image, pos[1], pos[2], w, h)
layout(c(1:3))
plot(sc_image)
plot(needle)
plot(found)
# usse `coner` to limit searching field
# `coner` can be used in Windows
pos <- locate_image(needle, corner = "bottom_left", center = FALSE)
}
}