The extractor runs on a folder of images that contains, in the same directory, a COCO JSON formatted annotation file. The extractor-coco displays the images overlaid with COCO formated annotations. This function is suitable for examining the existing annotations, correcting annotation issues as well as for previewing the data stored on a server. The bounding box type of annotations is currently supported.
COCO format was selected because it is a common format for object detection tasks and is suitable for converting from and to other formats, e.g. https://roboflow.com/formats/coco-json
The color and thickness of the bounding box line can be modified by changing the parameters "rgb" and "width" under the process_message method.