What values are in the paf and heatmap?

[shimakei3302]

Hello.
What values are stored in the variables heatmap and paf that are calculated in the body.py program?
Why is the number of sizes in heatmap and paf larger than the number of sizes of the loaded images?
For example, the shape of the loaded image is (480, 640, 3), but the heatmap is (480, 640, 19) and the paf is (480, 640, 38).