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/*
* Copyright (c) 2017-2018 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_CLCANNYEDGEKERNEL_H__
#define __ARM_COMPUTE_CLCANNYEDGEKERNEL_H__
#include "arm_compute/core/CL/ICLKernel.h"
#include <cstdint>
namespace arm_compute
{
class ICLTensor;
/** OpenCL kernel to perform Gradient computation.
*/
class CLGradientKernel : public ICLKernel
{
public:
/** Constructor */
CLGradientKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLGradientKernel(const CLGradientKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLGradientKernel &operator=(const CLGradientKernel &) = delete;
/** Initialise the kernel's sources, destinations and border mode.
*
* @note gx, gy and mag must all be the same size (either 16 or 32).
*
* @param[in] gx Source tensor - Gx component. Data types supported: S16/S32.
* @param[in] gy Source tensor - Gy component. Data types supported: Same as gx.
* @param[out] magnitude Destination tensor - Magnitude. Data types supported: U16/U32. Must match the pixel size of gx, gy.
* @param[out] phase Destination tensor - Quantized phase. Data types supported: U8.
* @param[in] norm_type Normalization type. if 1, L1-Norm otherwise L2-Norm.
*/
void configure(const ICLTensor *gx, const ICLTensor *gy, ICLTensor *magnitude, ICLTensor *phase, int32_t norm_type);
// Inherited methods overridden:
void run(const Window &window, cl::CommandQueue &queue) override;
private:
const ICLTensor *_gx; /**< Source tensor - Gx component */
const ICLTensor *_gy; /**< Source tensor - Gy component */
ICLTensor *_magnitude; /**< Destination tensor - Magnitude */
ICLTensor *_phase; /**< Destination tensor - Quantized phase */
};
/** OpenCL 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. The output buffer needs to be cleared before this kernel is executed.
*
* @note Hysteresis is computed in @ref CLEdgeTraceKernel
*/
class CLEdgeNonMaxSuppressionKernel : public ICLKernel
{
public:
/** Constructor */
CLEdgeNonMaxSuppressionKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLEdgeNonMaxSuppressionKernel(const CLEdgeNonMaxSuppressionKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLEdgeNonMaxSuppressionKernel &operator=(const CLEdgeNonMaxSuppressionKernel &) = delete;
/** Initialise the kernel's sources, destination and border mode.
*
* @param[in] magnitude Source tensor - Magnitude. Data types supported: U16/U32.
* @param[in] phase Source tensor - Quantized phase. Data types supported: U8.
* @param[out] output Destination tensor. Data types supported: U16/U32.
* @param[in] lower_thr Lower threshold.
* @param[in] border_undefined True if the border mode is undefined. False if it's replicate or constant.
*/
void configure(const ICLTensor *magnitude, const ICLTensor *phase, ICLTensor *output, int32_t lower_thr, bool border_undefined);
// Inherited methods overridden:
void run(const Window &window, cl::CommandQueue &queue) override;
BorderSize border_size() const override;
private:
const ICLTensor *_magnitude; /**< Source tensor - Magnitude. */
const ICLTensor *_phase; /**< Source tensor - Quantized phase. */
ICLTensor *_output; /**< Destination tensor. */
};
/** OpenCL kernel to perform Edge tracing.
*/
class CLEdgeTraceKernel : public ICLKernel
{
public:
/** Constructor */
CLEdgeTraceKernel();
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLEdgeTraceKernel(const CLEdgeTraceKernel &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLEdgeTraceKernel &operator=(const CLEdgeTraceKernel &) = delete;
/** Initialise the kernel's source, destination and border mode.
*
* @param[in] input Source tensor. Data types supported: U8.
* @param[out] output Destination tensor. Data types supported: U8.
* @param[in] upper_thr Upper threshold used for the hysteresis
* @param[in] lower_thr Lower threshold used for the hysteresis
* @param[in,out] visited Tensor for keeping the visited pixels. Data types supported: U32.
* Expected to be initialized to 0 before each run.
* @param[in,out] recorded Tensor for keeping the recorded pixels. Data types supported: U32
* Expected to be initialized to 0 before each run.
* @param[in,out] l1_stack Tensor with the L1 stack for each pixel. Data types supported: S32.
* Expected to be initialized to 0 before each run.
* @param[in,out] l1_stack_counter Tensor for counting the elements in the L1 stack of each pixel. Data types supported: U8.
* Expected to be initialized to 0 before each run.
*/
void configure(const ICLTensor *input, ICLTensor *output, int32_t upper_thr, int32_t lower_thr,
ICLTensor *visited, ICLTensor *recorded, ICLTensor *l1_stack, ICLTensor *l1_stack_counter);
// Inherited methods overridden:
void run(const Window &window, cl::CommandQueue &queue) override;
private:
const ICLTensor *_input; /**< Source tensor. */
ICLTensor *_output; /**< Destination tensor. */
int32_t _lower_thr; /**< Lower threshold used for the hysteresis. */
int32_t _upper_thr; /**< Upper threshold used for the hysteresis. */
ICLTensor *_visited; /**< Marks visited elements */
ICLTensor *_recorded; /**< Marks recorded elements */
ICLTensor *_l1_stack; /**< L1 hysteris stack */
ICLTensor *_l1_stack_counter; /**< L1 hysteris stack counter */
};
} // namespace arm_compute
#endif /* __ARM_COMPUTE_CLCANNYEDGEKERNEL_H__ */
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