ZheC
commented
7 years ago (1) Each joint has three values (x, y, visible flag), 0 means the joint is not detected (occluded or truncated). (2) Could be false positive. You can actually check the result visulization.
Dear Authors,
First thank you very much for providing such a powerful tool!! It is really awesome!
However, when I estimated the skeletons in the KTH dataset, I found some inconsistencies in the generated json files. I could not fully understand why this problem happens.
For example, when I processed the video person11_handwaving_d2_uncomp.avi, in frame000156.json I got:
{ "version":0.1, "bodies":[ { "joints":[0,0,0,108.623,23.1522,0.252051,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,110.581,52.8297,0.351235,113.17,74.0262,0.420707,114.796,95.5481,0.566846,102.767,52.827,0.365775,104.713,73.6887,0.410267,100.82,95.221,0.55647,107.963,37.5057,0.421713] }, { "joints":[0,0,0,108.623,23.1522,0.252051,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,110.581,52.8297,0.351235,113.17,74.0262,0.420707,114.796,95.5481,0.566846,102.767,52.827,0.365775,104.713,73.6887,0.410267,100.82,95.221,0.55647,107.963,37.5057,0.421713] }, { "joints":[0,0,0,108.623,23.1522,0.252051,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,110.581,52.8297,0.351235,113.17,74.0262,0.420707,114.796,95.5481,0.566846,102.767,52.827,0.365775,104.713,73.6887,0.410267,100.82,95.221,0.55647,107.963,37.5057,0.421713] }] }
Here are my questions: (1) What is the meaning of the 0 values in the "joints" entry? Do they imply detection failure? (2) Only one person appears in the scene, so why three skeletons are generated??
I am looking forward to your answer, which are very important for my ongoing research; )
best, Yan