Efficiently map external array data (OpenCV) to spark array

[Jaonary Rabarisoa <ja...@gmail.com>]

Hi all,

I'm currently trying to use Spark Kmean|| to cluster keypoints descriptor
extracted using OpenCV.
OpenCV extract and store descriptors insinde Mat object. I convert Mat
object into Array[Array[Double]] with the following code :

(0 until descriptors.rows).map { i =>
        val row = new Array[Float](descriptors.cols)
        descriptors.get(i,0,row)
         row.map(_.toDouble)
}

This works but really slow down the code.

Is there another alternatives ?


Cheers,