screenshot (version 0.9.2)

locate_image: Locate needle image position on a screenshot image.

Description

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,
  size = NULL,
  scale = NULL,
  bin_dir = ""
)

Value

   A numeric pair of xy location.

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.

size

Integers to specify width or height of display size.

scale

A numeric to specify display scale.

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 <- crop_image(sc_image, pos_x, pos_y, w, h)
  (locate_image(needle)) # center location
  pos <- locate_image(needle, center = FALSE)
  found <- crop_image(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)
}
}