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1 /*M///////////////////////////////////////////////////////////////////////////////////////
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3 //  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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10 //                           License Agreement
11 //                For Open Source Computer Vision Library
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42 
43 #ifndef __OPENCV_CUDA_DEVICE_LBP_HPP_
44 #define __OPENCV_CUDA_DEVICE_LBP_HPP_
45 
46 #include "opencv2/core/cuda/common.hpp"
47 #include "opencv2/core/cuda/emulation.hpp"
48 
49 namespace cv { namespace cuda { namespace device {
50 
51 namespace lbp {
52 
53     struct Stage
54     {
55         int    first;
56         int    ntrees;
57         float  threshold;
58     };
59 
60     struct ClNode
61     {
62         int   left;
63         int   right;
64         int   featureIdx;
65     };
66 
67     struct InSameComponint
68     {
69     public:
InSameComponintcv::cuda::device::lbp::InSameComponint70         __device__ __forceinline__ InSameComponint(float _eps) : eps(_eps) {}
InSameComponintcv::cuda::device::lbp::InSameComponint71         __device__ __forceinline__ InSameComponint(const InSameComponint& other) : eps(other.eps) {}
72 
operator ()cv::cuda::device::lbp::InSameComponint73         __device__ __forceinline__ bool operator()(const int4& r1, const int4& r2) const
74         {
75             float delta = eps * (::min(r1.z, r2.z) + ::min(r1.w, r2.w)) * 0.5f;
76 
77             return ::abs(r1.x - r2.x) <= delta && ::abs(r1.y - r2.y) <= delta
78                 && ::abs(r1.x + r1.z - r2.x - r2.z) <= delta && ::abs(r1.y + r1.w - r2.y - r2.w) <= delta;
79         }
80         float eps;
81     };
82 
83     template<typename Pr>
partition(int4 * vec,unsigned int n,int * labels,Pr predicate)84     __device__ __forceinline__ void partition(int4* vec, unsigned int n, int* labels, Pr predicate)
85     {
86         unsigned tid = threadIdx.x;
87         labels[tid] = tid;
88         __syncthreads();
89         for (unsigned int id = 0; id < n; id++)
90         {
91             if (tid != id && predicate(vec[tid], vec[id]))
92             {
93                 int p = labels[tid];
94                 int q = labels[id];
95                 if (p < q)
96                 {
97                     Emulation::smem::atomicMin(labels + id, p);
98                 }
99                 else if (p > q)
100                 {
101                     Emulation::smem::atomicMin(labels + tid, q);
102                 }
103             }
104         }
105         __syncthreads();
106     }
107 
108 } // lbp
109 
110 } } }// namespaces
111 
112 #endif
113