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24 #ifndef __ARM_COMPUTE_NECANNYEDGEKERNEL_H__
25 #define __ARM_COMPUTE_NECANNYEDGEKERNEL_H__
27 #include "arm_compute/core/NEON/INEKernel.h"
35 /** Computes magnitude and quantised phase from inputs gradients. */
36 class NEGradientKernel : public INEKernel
39 const char *name() const override
41 return "NEGradientKernel";
43 /** Default constructor */
45 /** Prevent instances of this class from being copied (As this class contains pointers) */
46 NEGradientKernel(const NEGradientKernel &) = delete;
47 /** Prevent instances of this class from being copied (As this class contains pointers) */
48 NEGradientKernel &operator=(const NEGradientKernel &) = delete;
49 /** Allow instances of this class to be moved */
50 NEGradientKernel(NEGradientKernel &&) = default;
51 /** Allow instances of this class to be moved */
52 NEGradientKernel &operator=(NEGradientKernel &&) = default;
53 /** Default destructor */
54 virtual ~NEGradientKernel() = default;
56 /** Initialise the kernel's sources, destinations and border mode.
58 * @note gx, gy and magnitude must all be the same size (either 16 or 32)
60 * @param[in] gx Source tensor - Gx component. Data type supported: S16/S32.
61 * @param[in] gy Source tensor - Gy component. Data type supported: same as @p gx.
62 * @param[out] magnitude Destination tensor - Magnitude. Data type supported: U16 (if the data type of @p gx is S16) / U32 (if the data type of @p gx is S32).
63 * @param[out] phase Destination tensor - Quantized phase. Data type supported: U8.
64 * @param[in] norm_type Normalization type. If 1, L1-Norm otherwise L2-Norm
66 virtual void configure(const ITensor *gx, const ITensor *gy, ITensor *magnitude, ITensor *phase, int32_t norm_type);
68 // Inherited methods overridden:
69 void run(const Window &window, const ThreadInfo &info) override;
72 /** Common signature for all the specialised gradient functions
74 * @param[in] gx_ptr Pointer to the first input tensor.
75 * @param[in] gy_ptr Pointer to the second input tensor.
76 * @param[out] magnitude_ptr Pointer to the first output tensor
77 * @param[out] phase_ptr Pointer to the second output tensor
79 using GradientFunction = void(const void *__restrict gx_ptr, const void *__restrict gy_ptr, void *__restrict magnitude_ptr, void *__restrict phase_ptr);
81 GradientFunction *_func; /**< Gradient function to use for the particular tensor types passed to configure() */
82 const ITensor *_gx; /**< Source tensor - Gx component */
83 const ITensor *_gy; /**< Source tensor - Gy component */
84 ITensor *_magnitude; /**< Destination tensor - Magnitude */
85 ITensor *_phase; /**< Destination tensor - Quantized phase */
88 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
89 /** NEON kernel to perform Gradient computation for FP16 datatype
91 class NEGradientFP16Kernel : public NEGradientKernel
94 const char *name() const override
96 return "NEGradientFP16Kernel";
98 // Inherited methods overriden:
99 void configure(const ITensor *gx, const ITensor *gy, ITensor *magnitude, ITensor *phase, int32_t norm_type) override;
101 #else /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
102 /** NEON kernel to perform Gradient computation for FP16 datatype */
103 using NEGradientFP16Kernel = NEGradientKernel;
104 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
106 /** NEON kernel to perform Non-Maxima suppression for Canny Edge.
108 * @note This kernel is meant to be used alongside CannyEdge and performs a non-maxima suppression using magnitude and phase of input
109 * to characterize points as possible edges. Thus, at the end, each point will be set to EDGE, NO_EDGE or MAYBE.
111 * @note Hysteresis is computed in @ref NEEdgeTraceKernel
113 class NEEdgeNonMaxSuppressionKernel : public INEKernel
116 const char *name() const override
118 return "NEEdgeNonMaxSuppressionKernel";
120 /** Default constructor */
121 NEEdgeNonMaxSuppressionKernel();
122 /** Prevent instances of this class from being copied (As this class contains pointers) */
123 NEEdgeNonMaxSuppressionKernel(const NEEdgeNonMaxSuppressionKernel &) = delete;
124 /** Prevent instances of this class from being copied (As this class contains pointers) */
125 NEEdgeNonMaxSuppressionKernel &operator=(const NEEdgeNonMaxSuppressionKernel &) = delete;
126 /** Allow instances of this class to be moved */
127 NEEdgeNonMaxSuppressionKernel(NEEdgeNonMaxSuppressionKernel &&) = default;
128 /** Allow instances of this class to be moved */
129 NEEdgeNonMaxSuppressionKernel &operator=(NEEdgeNonMaxSuppressionKernel &&) = default;
130 /** Default destructor */
131 ~NEEdgeNonMaxSuppressionKernel() = default;
133 /** Initialise the kernel's sources, destination and border mode.
135 * @param[in] magnitude Source tensor - Magnitude. Data type supported: U16/U32.
136 * @param[in] phase Source tensor - Quantized phase. Data type supported: U8.
137 * @param[out] output Output tensor. Data type supported: U8. It will be filled with 0 for "no edge", 127 for "maybe", 255 for "edge"
138 * @param[in] upper_thr Upper threshold used for the hysteresis
139 * @param[in] lower_thr Lower threshold used for the hysteresis
140 * @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant.
142 void configure(const ITensor *magnitude, const ITensor *phase, ITensor *output, int32_t upper_thr, int32_t lower_thr, bool border_undefined);
144 // Inherited methods overridden:
145 void run(const Window &window, const ThreadInfo &info) override;
146 BorderSize border_size() const override;
149 /** Common signature for all the specialised non-maxima suppression functions
151 * @param[in] magnitude_ptr Pointer to the first input tensor.
152 * @param[in] phase_ptr Pointer to the second input tensor.
153 * @param[out] output_ptr Pointer to the output tensor
154 * @param[in] stride_mag Stride of the magnitude tensor
155 * @param[in] upper_thr Upper threshold used for the hysteresis
156 * @param[in] lower_thr Lower threshold used for the hysteresis
158 using EdgeNonMaxSupprFunction = void(const void *__restrict magnitude_ptr, const void *__restrict phase_ptr, void *__restrict output_ptr, const uint32_t stride_mag, const int32_t upper_thr,
159 const int32_t lower_thr);
161 EdgeNonMaxSupprFunction *_func; /**< Non-Maxima suppression function to use for the particular tensor types passed to configure() */
162 const ITensor *_magnitude; /**< Source tensor - Magnitude */
163 const ITensor *_phase; /**< Source tensor - Quantized phase */
164 ITensor *_output; /**< Destination tensor */
165 int32_t _lower_thr; /**< Lower threshold used for the hysteresis */
166 int32_t _upper_thr; /**< Upper threshold used for the hysteresis */
169 /** NEON kernel to perform Edge tracing */
170 class NEEdgeTraceKernel : public INEKernel
173 const char *name() const override
175 return "NEEdgeTraceKernel";
177 /** Default constructor */
179 /** Prevent instances of this class from being copied (As this class contains pointers) */
180 NEEdgeTraceKernel(const NEEdgeTraceKernel &) = delete;
181 /** Prevent instances of this class from being copied (As this class contains pointers) */
182 NEEdgeTraceKernel &operator=(const NEEdgeTraceKernel &) = delete;
183 /** Allow instances of this class to be moved */
184 NEEdgeTraceKernel(NEEdgeTraceKernel &&) = default;
185 /** Allow instances of this class to be moved */
186 NEEdgeTraceKernel &operator=(NEEdgeTraceKernel &&) = default;
187 /** Default constructor */
188 ~NEEdgeTraceKernel() = default;
190 /** Initialise the kernel's source, destination and border mode.
192 * @param[in,out] input Source tensor. Data type supported: U8. Must contain 0 for "no edge", 127 for "maybe", 255 for "edge"
193 * @param[in,out] output Destination tensor. Data type supported: U8. Must be initialized to 0 (No edge).
195 void configure(ITensor *input, ITensor *output);
197 // Inherited methods overridden:
198 void run(const Window &window, const ThreadInfo &info) override;
199 BorderSize border_size() const override;
200 bool is_parallelisable() const override;
203 ITensor *_input; /**< Source tensor */
204 ITensor *_output; /**< Destination tensor */
206 } // namespace arm_compute
207 #endif /* __ARM_COMPUTE_NECANNYEDGEKERNEL_H */