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/*
* Copyright (c) 2016, 2017 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.
*/
#include "helpers.h"
/** Perform binary thresholding on an image.
*
* @param[in] in_ptr Pointer to the source image
* @param[in] in_stride_x Stride of the source image in X dimension (in bytes)
* @param[in] in_step_x src_stride_x * number of elements along X processed per workitem(in bytes)
* @param[in] in_stride_y Stride of the source image in Y dimension (in bytes)
* @param[in] in_step_y src_stride_y * number of elements along Y processed per workitem(in bytes)
* @param[in] in_offset_first_element_in_bytes The offset of the first element in the first source image
* @param[out] out_ptr Pointer to the destination image
* @param[in] out_stride_x Stride of the destination image in X dimension (in bytes)
* @param[in] out_step_x dst_stride_x * number of elements along X processed per workitem(in bytes)
* @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes)
* @param[in] out_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes)
* @param[in] out_offset_first_element_in_bytes The offset of the first element in the destination image
* @param[in] false_val False value
* @param[in] true_val True value
* @param[in] threshold The thresold value
*/
__kernel void threshold_binary(
IMAGE_DECLARATION(in),
IMAGE_DECLARATION(out),
const uchar false_val,
const uchar true_val,
const uchar threshold)
{
// Get pixels pointer
Image in = CONVERT_TO_IMAGE_STRUCT(in);
Image out = CONVERT_TO_IMAGE_STRUCT(out);
// Load data
uchar16 in_data = vload16(0, in.ptr);
// Perform binary thresholding
in_data = select((uchar16)false_val, (uchar16)true_val, in_data > (uchar16)threshold);
// Store result
vstore16(in_data, 0, out.ptr);
}
/** Perform range thresholding on an image.
*
* @param[in] in_ptr Pointer to the source image
* @param[in] in_stride_x Stride of the source image in X dimension (in bytes)
* @param[in] in_step_x src_stride_x * number of elements along X processed per workitem(in bytes)
* @param[in] in_stride_y Stride of the source image in Y dimension (in bytes)
* @param[in] in_step_y src_stride_y * number of elements along Y processed per workitem(in bytes)
* @param[in] in_offset_first_element_in_bytes The offset of the first element in the first source image
* @param[out] out_ptr Pointer to the destination image
* @param[in] out_stride_x Stride of the destination image in X dimension (in bytes)
* @param[in] out_step_x dst_stride_x * number of elements along X processed per workitem(in bytes)
* @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes)
* @param[in] out_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes)
* @param[in] out_offset_first_element_in_bytes The offset of the first element in the destination image
* @param[in] false_val False value
* @param[in] true_val True value
* @param[in] lower Lower threshold
* @param[in] upper Upper threshold
*/
__kernel void threshold_range(
IMAGE_DECLARATION(in),
IMAGE_DECLARATION(out),
const uchar false_val,
const uchar true_val,
const uchar lower,
const uchar upper)
{
// Get pixels pointer
Image in = CONVERT_TO_IMAGE_STRUCT(in);
Image out = CONVERT_TO_IMAGE_STRUCT(out);
// Load data
uchar16 in_data = vload16(0, in.ptr);
// Perform range thresholding
in_data = select((uchar16)true_val, (uchar16)false_val, in_data > (uchar16)upper || in_data < (uchar16)lower);
// Store result
vstore16(in_data, 0, out.ptr);
}
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