Plotting function for 2-D object detection visualization.

Source: R/ssdUtilities.R

Renders boxes on objects within rasterized images.

drawRectangles(
  image,
  boxes,
  boxColors = "red",
  confidenceValues = NULL,
  captions = NULL
)

Arguments

image

standard image using something like jpeg::readJPEG.
boxes

a data frame or comprising where each row has the format: xmin, xmax, ymin, ymax.
boxColors

Optional scalar or vector of length = numberOfBoxes used for determining the colors of the different boxes.
confidenceValues

Optional vector of length = numberOfBoxes where each element is in the range [0, 1]. Used for determining border width.
captions

Optional vector of length = numberOfBoxes where each element is the caption rendered with each box.

Author

Tustison NJ

Examples

jpg = ANTsRCore::getANTsRData("r16")
if (requireNamespace("jpeg", quietly = TRUE)) {
image = jpeg::readJPEG(jpg)
vec2d = c(1, 10, 1, 10)
drawRectangles(image, vec2d)
vec2d = rbind(
c(1, 10, 1, 10),
c(20, 40, 30, 40)
)
drawRectangles(image, vec2d)
}