OpenCV computer vision with iOS
16/1/2013
Repo had become a mess. Trashed it with a fresh commit.
9/1/2013
added fast vs accurate comparisons
fast omits canny and only scans 1 colour plane
accurate includes canny and scans all colours
2/1/2013
openCV library compiled from latest gitHub clone
Requirements: OSX10.7+ XCode4.4+ iOS5.0+
For XCode4.2/Snow Leopard see OpenCVSquaresSL
integrating openCV and C++ with objective-C
This is a sample application using openCV in iOS. It adapts the "squares.cpp" sample code included with the openCV distribution. https://github.com/Itseez/opencv/blob/master/samples/cpp/squares.cpp
Prompted from a question on stack overflow:
=======================
The aim is to keep the original c++ code as pristine as possible, and to keep the bulk of the work with openCV in pure c++ files for (im)portability.
CVViewController.h / CVViewController.m
-
pure Objective-C
-
communicates with openCV c++ code via a WRAPPER... it neither knows nor cares that c++ is processing these method calls behind the wrapper.
CVWrapper.h / CVWrapper.mm
- objective-C++
does as little as possible, really only two things...
- calls to UIImage objC++ categories to convert to and from UIImage <> cv::Mat
- mediates between CVViewController's obj-C methods and CVSquares c++ (class) function calls
CVSquares.h / CVSquares.cpp
- pure C++
CVSquares.cppdeclares public functions inside a class definition (in this case, one static function).
This replaces the work ofmain{}in the original file.- We try to keep
CVSquares.cppas close as possible to the C++ original for portability.
UIImage+OpenCV
This UIImage category is an objC++ file containing the code to convert between UIImage and cv::Mat image formats.