Open CV Tutorial on IOS not working, EXC_BAD_ACCESS - ios

Question

I am trying to write a simple openCV app for iOS, but I am having trouble with using openCV functions in XCode. They will throw a EXC_BAD_ACCESS(code = 1), or not work entirely. I am using the processImage sample from the tutorial and that doesn't even work. I am using XCode 7.3 beta and believe I have installed openCV 2.4.11 correctly.
ViewController.h
#import <UIKit/UIKit.h>
#import <opencv2/highgui/cap_ios.h>
using namespace cv;
#interface ViewController : UIViewController <CvVideoCameraDelegate>
{
//IBOutlet UIImageView *imageView;
CvVideoCamera *camera;
}
#property (nonatomic, retain) CvVideoCamera* camera;
#end
ViewController.mm
#import "ViewController.h"
#import <opencv2/highgui/cap_ios.h>
#interface ViewController ()
#property (weak, nonatomic) IBOutlet UIImageView *imageView
#end
#implementation ViewController
#synthesize camera;
- (void)viewDidLoad {
[super viewDidLoad];
self.camera = [[CvVideoCamera alloc] initWithParentView: self.imageView];
self.camera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionBack;
self.camera.defaultAVCaptureSessionPreset = AVCaptureSessionPresetHigh;
self.camera.defaultAVCaptureVideoOrientation = AVCaptureVideoOrientationPortrait;
self.camera.defaultFPS = 60;
self.camera.grayscaleMode = NO;
self.camera.delegate = self;
self.camera.useAVCaptureVideoPreviewLayer = YES;
self.imageView.frame = self.view.bounds;
[self.camera start];
}
#pragma mark - Protocol CvVideoCameraDelegate
#ifdef __cplusplus
- (void)processImage:(cv::Mat&)image;
{
// Do some OpenCV stuff with the image
Mat image_copy;
cvtColor(image, image_copy, CV_BGRA2BGR);
// invert image
bitwise_not(image_copy, image_copy); // ERROR IS THROWN HERE, BUT IT
// WILL ALSO THROW ON THE CVTCOLOR
// IF I REMOVE THIS LINE
cvtColor(image_copy, image, CV_BGR2BGRA);
}
#endif
-(void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#end

Answer 1

I don't see any problems in your code. Maybe try downloading the newest version of the framework from here. Note that the header file cap_ios.h has moved to videoio which means you'll have to import: Hope that helps
#import <opencv2/videoio/cap_ios.h>