CODEWITHSUNDEEP
iosopencvcomputer-vision
Jameo
Jameo

Reputation: 4607

OpenCV Filter2D iPhone with Kernel

I am trying to define a custom kernel for OpenCV on iOS. I cannot seem to find a definitive method to do this. The method that I have seen some other people use is this one, and I can't seem to get it to work exactly how I want it to. I am using the cVVideoCamera delegate like this:

- (void)processImage:(Mat&)image;
{
// Do some OpenCV stuff with the image

  double m[] =    {1.0, 1.0, 1.0,
                  2.0, 2.0, 2.0,
                  1.0, 1.0, 1.0};
  cv::Mat kernel = cv::Mat(3, 3, CV_32FC2, m);
  int ddepth = -1;

  cv::filter2D(image, image, ddepth, kernel);

}

This does not seem to work. I think it might be because of the type in the cv:Mat constructor (CV_32FC2). Does anyone know what this should be for an iPhone camera usually? Or is there some other problem?

Upvotes: 1

Views: 1077

Answers (1)

Hammer
Hammer

Reputation: 10329

The type CV_32FC2 does not refer to the type of the image you are passing in, it refers to the type in the kernel you are making. Change the type of m to be float and change CV_32FC2 to CV_32f and it should work. You also should give Brad Larson's framework a try like he suggests if performance is a problem.

Upvotes: 2

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