Compiling OpenCV projects on Google Glass

[Anonym0u5]

Hello,
when I compile your project (or all other project using opencv) on my Google Glass, Eclipse says this on console: "OpenCV Library - 2.4.8] Could not find OpenCV Library - 2.4.8.apk!"

Full message is:

[2014-04-22 11:57:17 - ImageManipulation] Android Launch!
[2014-04-22 11:57:17 - ImageManipulation] adb is running normally.
[2014-04-22 11:57:17 - ImageManipulation] Performing com.space150.android.glass.opencvimagemanipulation.MainActivity activity launch
[2014-04-22 11:57:17 - ImageManipulation] Automatic Target Mode: Unable to detect device compatibility. Please select a target device.
[2014-04-22 11:57:19 - ImageManipulation] Uploading ImageManipulation.apk onto device '015DB7590800200D'
[2014-04-22 11:57:19 - ImageManipulation] Installing ImageManipulation.apk...
[2014-04-22 11:57:21 - ImageManipulation] Success!
[2014-04-22 11:57:21 - OpenCV Library - 2.4.8] Could not find OpenCV Library - 2.4.8.apk!
[2014-04-22 11:57:21 - ImageManipulation] Starting activity com.space150.android.glass.opencvimagemanipulation.MainActivity on device 015DB7590800200D
[2014-04-22 11:57:22 - ImageManipulation] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.space150.android.glass.opencvimagemanipulation/.MainActivity }

On android device I know that I have to install the OpenCV Manager directly from the Google Play...... but on Google Glass what I have to do?

Thanks

[Anonym0u5]

Ok.. I solved this problem, but now I see only this:
http://answers.opencv.org/upfiles/13935781384748768.png
Do you know why?

[lnanek]

You need to call setPreviewFpsRange. See my pull request here:
#2

[Anonym0u5]

thank you

[harryhow]

Hi @lnanek

Thanks for your solution. However, I'm trying to integrate this example, however, I have problem to get mCamera. What I've tried is to use mCamera = Camera.open() in surfaceChanged(). check my gist also...

[lnanek]

I don't see any call to open in that gist you linked. Have you tried specifying a camera ID? Like here:
https://github.com/lnanek/MedViewGlass/blob/master/src/com/neatocode/medviewglass/activity/CameraSurfaceView.java#L105

[harryhow]

Sorry I didn't post Camera.open() call in my previous gist, please check this again.

I put Camera.open() in surfaceCreated(), set cam parameters in surfaceChanged().
I also try to put 0 or -1 as parameter to open camera but still without good luck.

What I suspect from the log is this example using OpenCV's CameraBridgeViewBase as a client bridge between Android Cam and Open CV to init camera. That means if we open camera before BaseLoaderCallback(), the mOpenCvCameraView.enableView() in BaseLoaderCallback() won't work because camera resource has been occupied. :/

Any thoughts?

[lnanek]

Honestly, camera in use problems are a nightmare on Google Glass even
without involving libraries. I think swiping away from an app doesn't seem
to kill it, or even run as many life cycle events as you would expect.
Often when testing I do a full uninstall and reinstall of the app each
test, then to release a demo I usually have lots of code to kill the
process ASAP when the screen isn't foreground, use a launchMode that won't
give you multiple instances if it is started differently, etc.. It's kind
of like audio development where sometimes your process is killed and the
audio hardware still reports in use or keeps playing stuff until reboot.

On Wed, Apr 30, 2014 at 8:25 PM, Harry Chen [email protected]:

Sorry I didn't post Camera.open() call in my previous gist, please check
this https://gist.github.com/harryhow/c8f7bc3d48842b5fe362 again.

I put Camera.open() in surfaceCreated(), set cam parameters in
surfaceChanged().
I also try to put 0 or -1 as parameter to open camera but still without
good luck.

What I suspect from the log is this example using OpenCV's
CameraBridgeViewBase as a client bridge between Android Cam and Open CV to
init camera. That means if we open camera before BaseLoaderCallback(), the
mOpenCvCameraView.enableView() in BaseLoaderCallback() won't work because
camera resource has been occupied. :/

Any thoughts?

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