512

Camera triangulation

LiveJunhyuck Kwak2 apps · 8.1K installsToolsFree · contains adspe.cameratriangulation

Measure distance and length with camera

Alert me★ WatchOpen in Play ↗
Total installs
8,052
exact · Play shows 5,000+
Installs / day
0
7-day avg · last day 0
Rating
—★
— ratings · — reviews
Released
1 Feb 2021
5.7y ago
Last update
30 Nov 2022
v1.91 · 3.9y ago
Countries
—
not checked yet

Installs per day

gain of the exact counter
01234511 Oct13 Oct14 Oct

Lifetime avg ≈ 4/day (all installs ÷ days since release)

Daily tracking since 10 Oct 2026 · history grows every day

Install history

exact counter from Google Play
8,0518,0528,05310 Oct12 Oct14 Oct
02K4K6K8K10K1 Feb 202110 Oct 202614 Oct 2026

Dashed: estimate from the release date (no daily data before 10 Oct 2026) · time axis compressed before that day

Daily tracking since 10 Oct 2026 · history grows every day

Change timeline

Full history

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Manifest analysis reads only the required APK ranges. Base APK downloads may need separate device splits to install.

Permissions

12 in 5 groups
8 Sensitive2 Notable2 Routine

What this app can do with your phone

  • Know roughly where you are, using mobile towers and Wi-Fi networks
  • Know your exact location using GPS, Wi-Fi and mobile networks
  • Use your camera to take photos and record videos
  • Read photos, videos, and other files saved in your phone's shared storage
  • Add, change or delete photos, videos and other files in your phone's storage
  • Show its own windows or bubbles on top of other apps you are using
LocationSensitive2

Access to where your device is, using GPS or network signals

  • Know roughly where you are, using mobile towers and Wi-Fi networksapproximate location (network-based) · ACCESS_COARSE_LOCATION
  • Know your exact location using GPS, Wi-Fi and mobile networksprecise location (GPS and network-based) · ACCESS_FINE_LOCATION
Photos/Media/FilesSensitive2

Access to photos, videos, music and other files stored on your device

  • Read photos, videos, and other files saved in your phone's shared storageread the contents of your USB storage · READ_EXTERNAL_STORAGE
  • Add, change or delete photos, videos and other files in your phone's storagemodify or delete the contents of your USB storage · WRITE_EXTERNAL_STORAGE
StorageSensitive2

Access to files, photos and media saved on your phone's storage

  • Read photos, videos, and other files saved in your phone's shared storageread the contents of your USB storage · READ_EXTERNAL_STORAGE
  • Add, change or delete photos, videos and other files in your phone's storagemodify or delete the contents of your USB storage · WRITE_EXTERNAL_STORAGE
CameraSensitive1

Access to your camera to take photos and record video

  • Use your camera to take photos and record videostake pictures and videos · CAMERA
OtherSensitive5

Access to miscellaneous device features that don't fit other categories

  • Show its own windows or bubbles on top of other apps you are usingdraw over other apps · SYSTEM_ALERT_WINDOW
  • Start itself automatically as soon as your phone finishes turning onrun at startup · RECEIVE_BOOT_COMPLETED
  • Keep your phone's processor or screen from going to sleep, which can use more batteryprevent device from sleeping · WAKE_LOCK
  • Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
  • Connect to the internet to load content and send datafull network access · INTERNET

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Screenshot 1 Download
Screenshot 2 Download
Full description
안드로이드 버전 6.0 이하에서는 첫 설치 후 핸드폰의 어플리케이션 설정에서 위치, 카메라등의 권한을 설정하여야 합니다. I. 거리 측정 1. 거리를 알고 싶은 지점을 터치합니다. 2. 한 스텝 움직인 후 첫지점과 길이를 알고 싶은 지점을 터치합니다. 3. 두 지점을 잇는 선이보이며, 이후 계산이 진행되며, 계산이 끝나면 결과화면으로 전환됩니다. ** 계산의 오차는 Essential matrix의 추정과 카메라의 위치 사이의 거리에서의 오차에 기인합니다. Essential matrix의 경우는 여러번 반복 계산으로 가능하면 줄이도록 노력하였습니다. 카메라의 위치에 기인한 오차의 경우는 다음과 같은 루틴에서 발생합니다. 이 앱에서는 카메라에서 찍은 두 화면을 에피폴라 정렬한 후 매칭점들의 위치를 계산합니다. 바로 에피폴라 정렬하는 과정에서 카메라의 위치가 에피폴라 정렬된 상태에서 이동하여 발생하는 것으로 추정하고 있습니다. 이 오차는 좌,우로 이동 시 크게 발생하는 것을 경험적으로 알게되었습니다. 따라서, 첫 장면과 두번째 장면사이에 카메라는 앞 또는 뒤로 이동시키기 바랍니다. ** 매칭은 코너 검출을 이용하고 있습니다. 간혹 매칭이 안되는 경우가 있는데, 이는 매칭 방법에 의해 발생하는 것으로 보폭이 거리의 1/20배(경험적) 보다 클 경우 매칭이 안되는 것을 발견하였습니다. ** 보폭의 경우, 측정거리의 약 1/100배 ~ 1/20배 정도가 적당한 보폭의 크기입니다. 1/100 배이하에서는 두 장면의 차이를 인식하기(픽셀의 위치 차이가 작기 대문에)가 쉽지 않습니다. 물론, 서브픽셀 단위로 계산하여 극복하려 하였지만 이것도 2~5배정도의 해상도 정밀도 향상 정도입니다. ---- 개발자 연락처 : 곽준혁 대한민국 대전광역시 서구 계백로1158번길 113 201동 1404호 35389 760102-1768418 None None

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