This is a critical bug that needs fixing asap.

@simonm3 sorry, I made a mistake.
I corrected my comment.

Hi, @guichristmann

There are mistakes in NMS processing.
・errors

1. NMS applies regardless of class.
2. Inappropriate class reference during NMS processing

・code corrections
■utils.py - line 120,121
delete 「#」(comment out)
■utils.py - line 128,136
correct indents following bellow

※before correction
□□□if len(to_remove) != 0:
□□□□□# Remove boxes
□□□□□for r in to_remove[::-1]:
□□□□□□□del boxes[r]
□□□□□□□del scores[r]
□□□□□□□del classes[r]
□□□□□□□i += 1

※after correction
□□□if len(to_remove) != 0:
□□□□□# Remove boxes
□□□□□for r in to_remove[::-1]:
□□□□□□□del boxes[r]
□□□□□□□del scores[r]
□□□□□□□del classes[r]
□□□□i += 1

By correcting like this, I could obtain appropriate inference result.

Hi, @guichristmann

There are mistakes in NMS processing.
・errors

1. NMS applies regardless of class.
2. Inappropriate class reference during NMS processing

・code corrections
■utils.py - line 120,121
delete 「#」(comment out)
■utils.py - line 128,136
correct indents following bellow

※before correction
□□□if len(to_remove) != 0:
□□□□□# Remove boxes
□□□□□for r in to_remove[::-1]:
□□□□□□□del boxes[r]
□□□□□□□del scores[r]
□□□□□□□del classes[r]
□□□□□□□i += 1

※after correction
□□□if len(to_remove) != 0:
□□□□□# Remove boxes
□□□□□for r in to_remove[::-1]:
□□□□□□□del boxes[r]
□□□□□□□del scores[r]
□□□□□□□del classes[r]
□□□□i += 1

Thank you for this bug fix, you're amazin! :). Initially, I could oly detect only 1 out of 5 classes. After modifying the code, now I am able to detect 2 out of 5 classes. But other 3 classes remains undetected. :(

@YsYusaito Is there any other thing, that I have to fix and modify in the code to get all the classes detected?
Thank you again for your input.