One of the major changes between the previous two ISO standards is the
way the y axis is defined in a scan. The entry (0,0) used to refer to the top left corner of a scan, now it refers to the
bottom right corner, which means that all legacy x3p files have to flip their y axis in order to
conform to the newest ISO norm.
Usage
x3p_flip_y(x3p)
y_flip_x3p(x3p)
Value
x3p object in which the y coordinate is reversed.
Examples
logo <- x3p_read(system.file("csafe-logo.x3p", package="x3ptools"))
dim(logo$surface.matrix)
#> [1] 741 419
if (FALSE) {
x3p_image(logo)
}
# flip the y-axis for the old ISO standard:
logoflip <- x3p_flip_y(logo)
dim(logoflip$surface.matrix)
#> [1] 741 419
if (FALSE) {
x3p_image(logoflip)
}