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/*
* Copyright (c) 2016-2019 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_NECANNYEDGEKERNEL_H
#define ARM_COMPUTE_NECANNYEDGEKERNEL_H
#include "arm_compute/core/NEON/INEKernel.h"
#include <cstdint>
namespace arm_compute
{
class ITensor;
/** Computes magnitude and quantised phase from inputs gradients. */
class NEGradientKernel : public INEKernel
{
public:
const char *name() const override
{
return "NEGradientKernel";
}
/** Default constructor */
NEGradientKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEGradientKernel(const NEGradientKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEGradientKernel &operator=(const NEGradientKernel &) = delete;
/** Allow instances of this class to be moved */
NEGradientKernel(NEGradientKernel &&) = default;
/** Allow instances of this class to be moved */
NEGradientKernel &operator=(NEGradientKernel &&) = default;
/** Default destructor */
virtual ~NEGradientKernel() = default;
/** Initialise the kernel's sources, destinations and border mode.
*
* @note gx, gy and magnitude must all be the same size (either 16 or 32)
*
* @param[in] gx Source tensor - Gx component. Data type supported: S16/S32.
* @param[in] gy Source tensor - Gy component. Data type supported: same as @p gx.
* @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).
* @param[out] phase Destination tensor - Quantized phase. Data type supported: U8.
* @param[in] norm_type Normalization type. If 1, L1-Norm otherwise L2-Norm
*/
virtual void configure(const ITensor *gx, const ITensor *gy, ITensor *magnitude, ITensor *phase, int32_t norm_type);
// Inherited methods overridden:
void run(const Window &window, const ThreadInfo &info) override;
protected:
/** Common signature for all the specialised gradient functions
*
* @param[in] gx_ptr Pointer to the first input tensor.
* @param[in] gy_ptr Pointer to the second input tensor.
* @param[out] magnitude_ptr Pointer to the first output tensor
* @param[out] phase_ptr Pointer to the second output tensor
*/
using GradientFunction = void(const void *__restrict gx_ptr, const void *__restrict gy_ptr, void *__restrict magnitude_ptr, void *__restrict phase_ptr);
GradientFunction *_func; /**< Gradient function to use for the particular tensor types passed to configure() */
const ITensor *_gx; /**< Source tensor - Gx component */
const ITensor *_gy; /**< Source tensor - Gy component */
ITensor *_magnitude; /**< Destination tensor - Magnitude */
ITensor *_phase; /**< Destination tensor - Quantized phase */
};
/** NEON kernel to perform Non-Maxima suppression for Canny Edge.
*
* @note This kernel is meant to be used alongside CannyEdge and performs a non-maxima suppression using magnitude and phase of input
* to characterize points as possible edges. Thus, at the end, each point will be set to EDGE, NO_EDGE or MAYBE.
*
* @note Hysteresis is computed in @ref NEEdgeTraceKernel
*/
class NEEdgeNonMaxSuppressionKernel : public INEKernel
{
public:
const char *name() const override
{
return "NEEdgeNonMaxSuppressionKernel";
}
/** Default constructor */
NEEdgeNonMaxSuppressionKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEEdgeNonMaxSuppressionKernel(const NEEdgeNonMaxSuppressionKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEEdgeNonMaxSuppressionKernel &operator=(const NEEdgeNonMaxSuppressionKernel &) = delete;
/** Allow instances of this class to be moved */
NEEdgeNonMaxSuppressionKernel(NEEdgeNonMaxSuppressionKernel &&) = default;
/** Allow instances of this class to be moved */
NEEdgeNonMaxSuppressionKernel &operator=(NEEdgeNonMaxSuppressionKernel &&) = default;
/** Default destructor */
~NEEdgeNonMaxSuppressionKernel() = default;
/** Initialise the kernel's sources, destination and border mode.
*
* @param[in] magnitude Source tensor - Magnitude. Data type supported: U16/U32.
* @param[in] phase Source tensor - Quantized phase. Data type supported: U8.
* @param[out] output Output tensor. Data type supported: U8. It will be filled with 0 for "no edge", 127 for "maybe", 255 for "edge"
* @param[in] upper_thr Upper threshold used for the hysteresis
* @param[in] lower_thr Lower threshold used for the hysteresis
* @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant.
*/
void configure(const ITensor *magnitude, const ITensor *phase, ITensor *output, int32_t upper_thr, int32_t lower_thr, bool border_undefined);
// Inherited methods overridden:
void run(const Window &window, const ThreadInfo &info) override;
BorderSize border_size() const override;
private:
/** Common signature for all the specialised non-maxima suppression functions
*
* @param[in] magnitude_ptr Pointer to the first input tensor.
* @param[in] phase_ptr Pointer to the second input tensor.
* @param[out] output_ptr Pointer to the output tensor
* @param[in] stride_mag Stride of the magnitude tensor
* @param[in] upper_thr Upper threshold used for the hysteresis
* @param[in] lower_thr Lower threshold used for the hysteresis
*/
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,
const int32_t lower_thr);
EdgeNonMaxSupprFunction *_func; /**< Non-Maxima suppression function to use for the particular tensor types passed to configure() */
const ITensor *_magnitude; /**< Source tensor - Magnitude */
const ITensor *_phase; /**< Source tensor - Quantized phase */
ITensor *_output; /**< Destination tensor */
int32_t _lower_thr; /**< Lower threshold used for the hysteresis */
int32_t _upper_thr; /**< Upper threshold used for the hysteresis */
};
/** NEON kernel to perform Edge tracing */
class NEEdgeTraceKernel : public INEKernel
{
public:
const char *name() const override
{
return "NEEdgeTraceKernel";
}
/** Default constructor */
NEEdgeTraceKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEEdgeTraceKernel(const NEEdgeTraceKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
NEEdgeTraceKernel &operator=(const NEEdgeTraceKernel &) = delete;
/** Allow instances of this class to be moved */
NEEdgeTraceKernel(NEEdgeTraceKernel &&) = default;
/** Allow instances of this class to be moved */
NEEdgeTraceKernel &operator=(NEEdgeTraceKernel &&) = default;
/** Default constructor */
~NEEdgeTraceKernel() = default;
/** Initialise the kernel's source, destination and border mode.
*
* @param[in,out] input Source tensor. Data type supported: U8. Must contain 0 for "no edge", 127 for "maybe", 255 for "edge"
* @param[in,out] output Destination tensor. Data type supported: U8. Must be initialized to 0 (No edge).
*/
void configure(ITensor *input, ITensor *output);
// Inherited methods overridden:
void run(const Window &window, const ThreadInfo &info) override;
BorderSize border_size() const override;
bool is_parallelisable() const override;
private:
ITensor *_input; /**< Source tensor */
ITensor *_output; /**< Destination tensor */
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_NECANNYEDGEKERNEL_H */
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