Bbox color selection based on tracker id

[SlawekTT]

Could box_annotator have 'color' parameter - so as one could change dynamically change bbox color, eg. one color for all the bboxes except for the selected id, which would be highlighted with another color? The lack of this feature often makes the use of box_annotator and label_annotator obsolete

[Borda]

Hi @SlawekTT — this is already possible: every annotator's annotate() accepts custom_color_lookup, a per-detection index into the palette.

palette = sv.ColorPalette.from_hex(["#808080", "#FF0000"])  # 0 = default, 1 = highlight
box_annotator = sv.BoxAnnotator(color=palette)
label_annotator = sv.LabelAnnotator(color=palette)

lookup = (detections.tracker_id == selected_id).astype(int)
frame = box_annotator.annotate(frame, detections, custom_color_lookup=lookup)
frame = label_annotator.annotate(frame, detections, custom_color_lookup=lookup)

Closing as resolved — please reopen if something is still missing.