Hi, I don't know what is the meaning of '512' according to the descriptor

Question

Hi, I don't know what is the meaning of '512' according to the descriptor

Closed this issue 3 years ago · 5 comments

my descriptors.h5 contains descriptors of num_keypoints * 256
when I run submission_validator.py, it shows "Descriptors size is larger than 512 bytes"

Answer 1 · 2021-05-28T12:36:21.000Z

Thank you, it seems that we haven`t updated our validator w.r.t the recent rule change. You can ignore this message.
P.S. 512 bytes == 128 dim desc * 4 byte (per float32)

Answer 2 · 2021-05-28T12:38:14.000Z

so the value in descriptors.h5 is num_keypoints * 256?

Answer 3 · 2021-05-28T12:39:37.000Z

Sorry, I don't know what is value for your kind of descriptors

Answer 4 · 2021-05-28T12:40:11.000Z

one more question
the name of image is a string
and I don't know which is LARGEST_KEY or SMALLEST_KEY

Answer 5 · 2021-05-31T05:26:23.000Z

Alphabetically. The keys are image names, minus the extension. So if you have image1.jpg and image2.jpg the key in the matches file is matches2-matches1. It's explained here.

And as Dmytro said, the descriptor rule was just lifted, so no issues there.