Stray Robots toolkit

computer vision toolkit

SHOW HN2021

Object Detection in an Hour

How HN reacted

Curious

Mostly questions and neutral comments

2 positive, 15 neutral or mixed, 3 critical. Score -0.01

LikedClever use of video to build large training sets

ObjectedOnly works when the target object is static during capture

Summaries made by AI from the thread.

Shown by kekeblom on Aug 7, 2021. Click the card to turn it over.

166points

34comments

#289of 2,533 in 2021

Top 12%of 2021 by points

How HN took it

CuriousMostly questions and neutral comments

2 positive, 14 neutral or asking, 1 mixed, 3 critical, out of 20 comments about the project. Thread score -0.01.

Idea: 1 for, 1 againstExecution: 0 for, 2 against

Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.

positive neutral or mixed critical about another commenter or something else the maker

Clever use of video to build large training sets
From 1 comment
- Using video to automatically build a large training set is smart! Well done! I was thinking about making a properly free and open dataset from just walking around London, and…
  jonatron on HN
Impressive detection of moving objects without training on them
From 1 comment
- Yes it relies on the target being static when capturing the training data, but it’s ok for the background to move. We were actually surprised by how well it works on moving…
  kekeblom on HN

Only works when the target object is static during capture
From 1 comment
- This is only beneficial in static scenes right? Otherwise you can’t get free labels across the whole video.
  tadeegan on HN
iPhone app requires LiDAR-equipped Pro models; other iPhones are unsupported
From 2 comments
- Heads up for anyone else, I was interested in the strayscanner app to try on my iPhone 11, but I’m getting an error when trying to record: “unsupported device: this device…
  posix_compliant on HN
- I just got caught by this myself: it doesn't work on an regular iPhone 12 either. It needs to be an iPhone 12 Pro or 12 Pro Max.
  TomVDB on HN

Support front TrueDepth camera
From 1 comment
- Maybe worth to support front camera (TrueDepth camera) as well? Record3d gives pretty good accuracy (https://record3d.app/). I know probably not the best way to scan something…
  pzo on HN
Support YOLO and other model formats beyond Detectron2
From 1 comment
- Yeah the labels are loaded into the Detectron2 format from the 3D annotations json at train time, we plan to add similar data loading for YOLOv3 etc soon. Starting out with…
  hietalajulius on HN

Is 3D labelling actually faster than 2D annotation tools
From 2 comments
- Do you comprehend how the tool reduces labeling time in (4) and (5) (compared to labeling with eg CVAT) as the post claims?
  rocauc on HN
- You only have to label the 3D Bounding Box once. Then you can automatically generate 2D bounding boxes for every frame of the video. So instead of annotating every frame with a…
  mainframed on HN
What is the business plan
From 1 comment
- Just curious, what's the business plan behind this?
  nathan_phoenix on HN

CVAT annotation tool
From 1 comment
- Do you comprehend how the tool reduces labeling time in (4) and (5) (compared to labeling with eg CVAT) as the post claims?
  rocauc on HN
Record3D
From 1 comment
- Maybe worth to support front camera (TrueDepth camera) as well? Record3d gives pretty good accuracy (https://record3d.app/). I know probably not the best way to scan something…
  pzo on HN
SiteScape LiDAR 3D scanner
From 1 comment
- I was surprised to read this, but it appears you are correct. This other app uses the entire first paragraph to warn about this. Maybe something to copy:…
  bredren on HN