openpose extract only the skeleton

Question

I'm using openpose in a docker container. The following command create images, where the detected keypoints are printed on the original images.

openpose -display=0 -image_dir=/data -write_images=/data -face=true -hand=true

I would like to have the keypoints without the original image on a black background. Like shown here:

How can I do this?

Answer 1

You can use --disable_blending flag, as explained here: https://github.com/CMU-Perceptual-Computing-Lab/openpose/blob/master/doc/01_demo.md#main-flags

--disable_blending: If enabled, it will render the results (keypoint skeletons or heatmaps) on a black background, not showing the original image. Related: part_to_show, alpha_pose, and alpha_pose.