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c++ Programming Glossary: cosineOpenCV C++/Obj-C: Advanced square detection http://stackoverflow.com/questions/10533233/opencv-c-obj-c-advanced-square-detection approx double maxCosine 0 for int j 2 j 5 j double cosine fabs angle approx j 4 approx j 2 approx j 1 maxCosine MAX.. approx j 4 approx j 2 approx j 1 maxCosine MAX maxCosine cosine if maxCosine 0.3 squares.push_back approx c objective..
http://stackoverflow.com/questions/13014973/quaternion-rotate-to between those two unit vectors found by taking the inverse cosine of their dot product acos dotProduct z normalize p c Unfortunately..
Most effective way for float and double comparison http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison or max ULPS . The use of the same epsilon for both the cosine of angles and the length of lines Using such a compare function..
What is the fastest way to compute sin and cos together? http://stackoverflow.com/questions/2683588/what-is-the-fastest-way-to-compute-sin-and-cos-together have instruction FSINCOS for calculating sine and cosine functions simultaneously. If you need strong optimization perhaps.. not all modern compilers optimize calculation of sine and cosine into a call to FSINCOS . In particular my VS 2008 didn't do..
Dynamic Shared Library compilation with g++ http://stackoverflow.com/questions/483797/dynamic-shared-library-compilation-with-g dlfcn.h int main int argc char argv void handle double cosine double char error handle dlopen lib libm.so.6 RTLD_LAZY if handle.. libm.so.6 RTLD_LAZY if handle fputs dlerror stderr exit 1 cosine dlsym handle cos if error dlerror NULL fputs error stderr exit.. if error dlerror NULL fputs error stderr exit 1 printf f n cosine 2.0 dlclose handle If I compile the program with gcc it works..
Square detection doesn't find squares http://stackoverflow.com/questions/7731742/square-detection-doesnt-find-squares char wndname Square Detection Demo helper function finds a cosine of angle between vectors from pt0 pt1 and from pt0 pt2 double.. double maxCosine 0 for int j 2 j 5 j find the maximum cosine of the angle between joint edges double cosine fabs angle approx.. maximum cosine of the angle between joint edges double cosine fabs angle approx j 4 approx j 2 approx j 1 maxCosine MAX maxCosine..
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection http://stackoverflow.com/questions/8667818/opencv-c-obj-c-detecting-a-sheet-of-paper-square-detection approx double maxCosine 0 for int j 2 j 5 j double cosine fabs angle approx j 4 approx j 2 approx j 1 maxCosine MAX maxCosine.. approx j 4 approx j 2 approx j 1 maxCosine MAX maxCosine cosine if maxCosine 0.3 squares.push_back approx return squares.. approx double maxCosine 0 for int j 2 j 5 j double cosine fabs angle approx j 4 approx j 2 approx j 1 maxCosine MAX..
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