Draws bounding boxes (and optional labels) from a COCO-style annotation
file on top of an image. Returns a magick-image object that can be printed
or written to disk.
Usage
pg_plot_annotations(
image_path,
annotation_json,
categories = NULL,
class_colors = NULL,
outline_width = 4,
label = TRUE,
label_cex = 0.8,
label_alpha = 0.6,
label_colour = "white"
)Arguments
- image_path
Path to the image file.
- annotation_json
Path to the COCO annotations JSON containing the image.
- categories
Optional vector of category names or ids to keep. NULL keeps all.
- class_colors
Optional named vector of colours keyed by category name.
- outline_width
Line width for bounding boxes.
- label
Whether to draw category labels.
- label_cex
Text expansion factor for labels.
- label_alpha
Alpha for label background fill.
- label_colour
Label text colour.