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https://github.com/foundry/OpenCVSwiftStitch

Version 5 of OpenCVStitch. How to stitch images using OpenCV on iOS. This version demonstrates using Swift, Objective-C and C++ together in one project.
https://github.com/foundry/OpenCVSwiftStitch

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Version 5 of OpenCVStitch. How to stitch images using OpenCV on iOS. This version demonstrates using Swift, Objective-C and C++ together in one project.

Lists

README 

        
__OpenCV computer vision with iOS: stitching panoramas__  






Version 5.0 of [OpenCVStitch](http://github.com/foundry/OpenCVStitch) - updated for Swift 5.0  + OpenCV 4.3  

See appropriate branches and tags for Swift 2.x - 4.x



This project was created to a answer a couple of Stack Overflow questions:  

[libraries to CAPTURE panorama in iOS](http://stackoverflow.com/q/14062932/1375695)  

[Can I mix Swift with C++? Like the Objective - C .mm files](http://stackoverflow.com/q/24042774/1375695)    



v2 demonstrates how to mix Swift, Objective-C and C++ in one project whilst keeping the code clearly separate. 



The project AppDelegate and View Controller are written in Swift. Swift cannot talk directly to C++ (which we need for OpenCV), so we provide an Objective-C++ wrapper class to mediate between Swift and C++. We also provide an Objective-C++ category on UIImage to mediate between UIImage and CV::Mat image formats. The CVWrapper header file is pure Objective-C. For [v1](https://github.com/foundry/OpenCVStitch)(which doesn't use Swift) this separation was a matter of clean style. For v2, it is a requirement: if any C++ headers are included in the wrapper, the app will not compile (Swift won't like it).



__Installation__  

To run the project you need to install the OpenCV framework using Cocoapods    



Assuming you have first [installed CocoaPods](https://guides.cocoapods.org/using/getting-started.html), run 'pod install' in this directory to install OpenCV for the project. From then on, always open the project in XCode from the `SwiftStitch.xcworkspace` file that the pod install creates. 



The podfile will install openCV v4.3.0. 



__Use__  

OpenCVStitch is a very simple iOS/openCV example showing basic use of the Stitcher class. The c++ code is adapted from a sample included with the openCV distribution.  



The app has almost no user interface. On launch, the stitching code operates on four sample images, displaying the result in a UIScrollView.



__OpenCVSwiftStitch Versions__   

[Version 5.1](https://github.com/foundry/OpenCVSwiftStitch/releases/tag/5.1)  

Swift / Objective-C / C++   

OpenCV 4.3  

Modern Swift - async / await  

Error, exception handling from C++ -> Objective-C -> Swift  

Tested with XCode 13.2 / Swift 5.0 for iOS 13.0+  

[Version 5.0](https://github.com/foundry/OpenCVSwiftStitch/releases/tag/5.0)  

Swift / Objective-C / C++   

OpenCV 4.3  

Tested with XCode 12.0 / Swift 5.0 for iOS 9.0+  

[Version 4.0](https://github.com/foundry/OpenCVSwiftStitch/releases/tag/4.0)   

Swift / Objective-C / C++   

Tested with XCode 10.0 / Swift 4.2 for iOS 8.0+  

[Version 3.0](https://github.com/foundry/OpenCVSwiftStitch/releases/tag/3.0)   

Swift / Objective-C / C++   

Tested with XCode 8.0 / Swift 3.0 for iOS 8.0+  

[Version 2.1](https://github.com/foundry/OpenCVSwiftStitch)   

Swift / Objective-C / C++   

Tested with XCode 7.0 / Swift 2.0 for iOS 7.0+  

[Version 2.0](https://github.com/foundry/OpenCVSwiftStitch/tree/v2.0)   

Swift / Objective-C / C++   

Tested with XCode 6.4 / Swift 1.2 for iOS 7.0+  

[Version 1.0](https://github.com/foundry/OpenCVStitch)  

Objective-C / C++   

Tested with XCode 4.5.2 -> 6.3 for iOS 5.1 upwards   



Provides a partial answer to: [Libraries to capture panoramas in iOS 6](http://stackoverflow.com/questions/14062932/libraries-to-capture-panorama-in-ios-6/14064788#14064788) (Stack Overflow)



__OpenCV Versions__   

_OpenCV 4.3_  

The podfile installs OpenCV 4.3  



_this version of OpenCVStitch opted to use cocoapods to overcome the [notorious](http://stackoverflow.com/q/13905471/1375695) [installation](http://stackoverflow.com/q/15855894/1375695) [issues](http://stackoverflow.com/a/14186883/1375695) with previous versions of the framework_



__XCode 12__  



Project is now updated for Swift 5.0 and XCode 12. For backwards compatibility checkout the 2.0 / 2.1 branches, 3.0 /4.0 releases or refer to the Objective-C version v1.0.



__Comparisons__



OpenCV 2.4.9OpenCV 3.0.0OpenCV 3.1.0OpenCV 4.3.0



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