Hi i try to convert a Mat to Byte then the inverse so here is the code
frame = new Mat(height, width, CvType.CV_8UC4);
// traitement ...
byte[] data = = new byte[(int) (frame.total() * frame.channels())];
frame.get(0, 0, data);
// but data.length=0
What you have to do is store your frame in a Mat element and loop over it using the at functor. This will need the following code
Mat frame;
// To get data
frame.at<uchar>(i,j)
Also, please try to put more clear questions ... your question should not be found inside sample code.
from a mRgba i want to convert it to a byte array because i want to store it in DB (ormlite) i follow this but don't work http://answers.opencv.org/question/2847/convert-mat-to-matofbyte-in-android/ yes but why ? i didn't inderstand what you mean , i want just to convert a Mat (CV_8UC4) to byte array
Actually it is quite normal that your algorithm doesnt work. You are creating the Mat storage object, reserving memory, but there is no assignment, no placing of data in the Mat. Create a Mat of zero's for testing purposes using :
frame = new Mat::zeros(height, width, CvType.CV_8UC4)
Asked: 2013-04-07 10:47:57 -0600
Seen: 2,425 times
Last updated: Apr 07 '13
