use the camera flash with openCV library

asked 2014-01-18 01:12:43 -0600

mariusz8801 gravatar image

I have to turn the flash on using openCV. I have tried:

VideoCapture mCamera;
                mCamera = new VideoCapture(Highgui.CV_CAP_ANDROID);
                mCamera.set(Highgui.CV_CAP_PROP_ANDROID_FLASH_MODE, Highgui.CV_CAP_ANDROID_FLASH_MODE_TORCH);

There are no errors, but the flash does not turn on. Thank you in advance for your help.

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Are you also using this on an android device? I just want to make sure you are not using this on a normal camera

Moster gravatar imageMoster ( 2014-01-18 03:36:38 -0600 )edit

Yes I'm using this on an android device. I try: 

 if(mCamera.isOpened()) Context context;        
 context = getApplicationContext();
 Toast.makeText(context, "Przycisk działa!", Toast.LENGTH_LONG).show();

but do not show toast

mariusz8801 gravatar imagemariusz8801 ( 2014-01-18 03:46:46 -0600 )edit

And when I try if(mCamera != null) show toast

mariusz8801 gravatar imagemariusz8801 ( 2014-01-18 04:25:39 -0600 )edit

Try my java camera class that I created back then: http://answers.opencv.org/question/19796/android-use-autofocus-with-camerabridgeviewbase/ It tells you if a certain function does not work

Moster gravatar imageMoster ( 2014-01-18 05:11:51 -0600 )edit

thanks but i don't now why i'm use this class i my project. I would like to know why mCamera.isOpened() is not

mariusz8801 gravatar imagemariusz8801 ( 2014-01-18 05:33:50 -0600 )edit
2

You shouldnt use this class in your project, just check out if the torch mode actually works and if you can even get the camera to work

Moster gravatar imageMoster ( 2014-01-19 14:19:35 -0600 )edit
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