What's the meaning of 'scale' in mpii dataset?

[EthanGuan]

if I use my own dataset, every image is 640 * 480, what's the value of scale should I set it to?

[xingyizhou]

Hi EthanGuan,
Thanks for your interest in this project. The 'scale' in the mpii dataset is provided as an annotation, it is the square-shape human bounding size. It is dependent on the human bounding box size, not just the input image size. But it is safe to just set the scale to 640 and center at (320, 240).

[bwuzhang]

Would you please elaborate on this? How do I get bounding box given center and scale?

[xingyizhou]

The upper-left and bottom-right coordinates of bounding box are (center[0] - scale / 2, center[1] - scale / 2), (center[0] + scale / 2, center[1] + scale / 2).

[bwuzhang]

I guess by saying 'scale' you mean '200 * scale'. I did try this but I got some absurd annotation... On Feb 28, 2018 9:14 PM, "Xingyi Zhou" <notifications@github.com> wrote: The upper-left and bottom-right coordinates of bounding box are (center[0] - scale / 2, center[1] - scale / 2), (center[0] + scale / 2, center[1] + scale / 2). — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#2 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AIhx7ze-JgPb9UpXBgs3v6-vAImboFYkks5tZ1lzgaJpZM4RMouo> .

[xingyizhou]

Yes, it is '200 x scale' based on Newell's hourglass implementation. What's the following question?