Cut off a part of image from a whole image.

Cut off a part of image from a whole image.

Usage

hay2needle(haystack_image, pos_x, pos_y, w = 50, h = 20)

Arguments

haystack_image

An image of cimg.

pos_x, pos_y

A numeric to indicate the top left corner of cutting image. When NULL, position will be randomly sampled.

w, h

A numeric for width or height of the cutting image.

Value

          An image of cimg object.

Examples

haystack_image <- imager::load.example("parrots")
needle_image <- hay2needle(haystack_image, 200, 250, 100, 50)
layout(c(1:2))
plot(haystack_image)
plot(needle_image)