Convert coordinates to/from min/max representation from/to centroids/width

Source: R/ssdUtilities.R

Function for converting box coordinates to/from min/max representation from/to centroids/width

convertCoordinates(boxes, type = c("minmax2centroids", "centroids2minmax"))

Arguments

boxes

A vector or 2-D array where each row corresponds to a single box consisting of the format (xmin,xmax,ymin,ymax) or (centerx,centery,width,height) for 2-D vs. (xmin,xmax,ymin,ymax,zmin,zmax) or (centerx,centery,centerz,width,height,depth) for 3-D.
type

either 'minmax2centroids' or 'centroids2minmax'

Value

a vector or 2-D array with the converted coordinates

Author

Tustison NJ

Examples

vec2d = c(1, 10, 1, 10)
convertCoordinates(vec2d)

#> [1] 5.5 5.5 9.0 9.0
convertCoordinates(vec2d, type = "centroids2minmax")

#> [1]  0.5  1.5  5.0 15.0
convertCoordinates(rbind( vec2d, vec2d, vec2d))

#>       [,1] [,2] [,3] [,4]
#> vec2d  5.5  5.5    9    9
#> vec2d  5.5  5.5    9    9
#> vec2d  5.5  5.5    9    9
convertCoordinates(rbind( vec2d, vec2d, vec2d), "centroids2minmax")

#>       [,1] [,2] [,3] [,4]
#> vec2d  0.5  1.5    5   15
#> vec2d  0.5  1.5    5   15
#> vec2d  0.5  1.5    5   15

vec3d = c(1, 10, 1, 10, 1, 10)
convertCoordinates(vec3d)

#> [1] 5.5 5.5 5.5 9.0 9.0 9.0
convertCoordinates(vec3d, type = "centroids2minmax")

#> [1] -4.0  6.0  9.5 10.5 -4.0  6.0
convertCoordinates(rbind( vec3d, vec3d, vec3d))

#>       [,1] [,2] [,3] [,4] [,5] [,6]
#> vec3d  5.5  5.5  5.5    9    9    9
#> vec3d  5.5  5.5  5.5    9    9    9
#> vec3d  5.5  5.5  5.5    9    9    9
convertCoordinates(rbind( vec3d, vec3d, vec3d), type = "centroids2minmax")

#>       [,1] [,2] [,3] [,4] [,5] [,6]
#> vec3d   -4    6  9.5 10.5   -4    6
#> vec3d   -4    6  9.5 10.5   -4    6
#> vec3d   -4    6  9.5 10.5   -4    6