Download OpenCV Demo 2 apk 2.11 free for Android smartphone

26 Mar
OpenCV Demo 2

Posted by Barry Thomas in Tools | March 26, 2013 | 10 Comments

Apk file size: 447.0 KB

A demo app, based partly on the samples provided with the OpenCV library (Java wrapper version, v2.4.4). Demonstrates the use of Canny edge detection, Hough lines, Hough circles, 'in-range' colour detection, separate channel view, face detection, good-features-to-track and optical flow.

This app replaces the earlier version which has now been removed from

Larger screens (eg tablets) may be slow due to the amount of data being processed.

Read more about the app at - Source code of the key sections of the frame processing loop are on the web site.

The app was written mainly as a learning exercise and is provided with no guarantee of road worthiness or fitness for purpose. Let me know if you want a copy of the source code.

Whats new

    2.11 Small fixes
    2.1 Added optical flow.
    2.0 First release of this version, written for OpenCV2.4.4 Manager and Android 4.2.
    Changes from the earlier version: Hough lines, circles and Canny edges now on separate menu options; face detect now copies the largest face in view to the top left of the screen, then if it is not the same as the previous largest face, it saves it to the Pictures director; RGB separate channel view now removed.

Barry Thomas part of our Tools and have average installs from 10000 to 50000. Last Update March 26, 2013. Google play rating is 82.3333. Current verison is 2.11. Actual size 447.0 KB.

Download opencv-demo-2.apk 447.0 KB


Tegan Burns

Great demo I noticed that during face detection it lost my face if I rotated the screen. Probably not worth fixing due to process speeds though...

Sam Truzjan

Nice demos If the frontal camera is enabled then image displayed on the screen is rotated by 180 for some reason.

Alexander Pacha

Very nice demo Very nice demo to show off the capabilities openCV provides! You should consider putting up the source on GitHub or BitBucket.

Jim Maland

Excellent demo, I used this app in a middle school demo relating middle school math concepts to real applications like image processing. I should note that I pinged Barry to ask permission to use his app as part of demo and he gave his ok and even sent me the code.

J Blackmore

Nice - can you plublish source?

Yu Yang

very good demo very good code and very nice writer! thanks a lot for share!

Michal Bacik

Too slow Even BGR preview has 5 FPS, other tests are so slow that it's hardly usable.

Arjun Raveendran

Good reference for projects

Макс Белый

Cool I like it x

Aim rex

Can't change mode Not sure there are other way. Tried everything. Can't change to other mode like canny edge detector. Asus ZenFone 5

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