/* * Copyright (c) 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" #include "non_linear_filter_helpers.h" /** This function applies a non linear filter on a 3x3 box basis on an input image. * * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. * * @param[in] src_ptr Pointer to the source image. Supported data types: U8 * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image */ __kernel void non_linear_filter_box3x3( IMAGE_DECLARATION(src), IMAGE_DECLARATION(dst)) { Image src = CONVERT_TO_IMAGE_STRUCT(src); Image dst = CONVERT_TO_IMAGE_STRUCT(dst); // Load values uchar16 top = vload16(0, offset(&src, -1, -1)); uchar16 middle = vload16(0, offset(&src, -1, 0)); uchar16 bottom = vload16(0, offset(&src, -1, 1)); // Apply respective filter #ifdef MIN uchar16 tmp = min(top, min(middle, bottom)); uchar8 out = row_reduce_min_3(tmp); #elif defined(MAX) uchar16 tmp = max(top, max(middle, bottom)); uchar8 out = row_reduce_max_3(tmp); #elif defined(MEDIAN) uchar8 p0 = top.s01234567; uchar8 p1 = top.s12345678; uchar8 p2 = top.s23456789; uchar8 p3 = middle.s01234567; uchar8 p4 = middle.s12345678; uchar8 p5 = middle.s23456789; uchar8 p6 = bottom.s01234567; uchar8 p7 = bottom.s12345678; uchar8 p8 = bottom.s23456789; uchar8 out = sort9(p0, p1, p2, p3, p4, p5, p6, p7, p8); #else /* MIN or MAX or MEDIAN */ #error "Unsupported filter function" #endif /* MIN or MAX or MEDIAN */ // Store result vstore8(out, 0, dst.ptr); } /** This function applies a non linear filter on a 3x3 cross basis on an input image. * * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. * * @param[in] src_ptr Pointer to the source image. Supported data types: U8 * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image */ __kernel void non_linear_filter_cross3x3( IMAGE_DECLARATION(src), IMAGE_DECLARATION(dst)) { Image src = CONVERT_TO_IMAGE_STRUCT(src); Image dst = CONVERT_TO_IMAGE_STRUCT(dst); // Load values uchar8 top = vload8(0, offset(&src, 0, -1)); uchar16 middle = vload16(0, offset(&src, -1, 0)); uchar8 bottom = vload8(0, offset(&src, 0, 1)); // Apply respective filter #ifdef MIN uchar8 tmp_middle = row_reduce_min_3(middle); uchar8 out = min(tmp_middle, min(top, bottom)); #elif defined(MAX) uchar8 tmp_middle = row_reduce_max_3(middle); uchar8 out = max(tmp_middle, max(top, bottom)); #elif defined(MEDIAN) uchar8 p0 = top.s01234567; uchar8 p1 = middle.s01234567; uchar8 p2 = middle.s12345678; uchar8 p3 = middle.s23456789; uchar8 p4 = bottom.s01234567; uchar8 out = sort5(p0, p1, p2, p3, p4); #else /* MIN or MAX or MEDIAN */ #error "Unsupported filter function" #endif /* MIN or MAX or MEDIAN */ // Store result vstore8(out, 0, dst.ptr); } /** This function applies a non linear filter on a 3x3 disk basis on an input image. * * @note The needed filter operation is defined through the preprocessor by passing either -DMIN, -DMAX or -DMEDIAN. * * @param[in] src_ptr Pointer to the source image. Supported data types: U8 * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image */ __kernel void non_linear_filter_disk3x3( IMAGE_DECLARATION(src), IMAGE_DECLARATION(dst)) { Image src = CONVERT_TO_IMAGE_STRUCT(src); Image dst = CONVERT_TO_IMAGE_STRUCT(dst); // Load values uchar16 top = vload16(0, offset(&src, -1, -1)); uchar16 middle = vload16(0, offset(&src, -1, 0)); uchar16 bottom = vload16(0, offset(&src, -1, 1)); // Apply respective filter #ifdef MIN uchar16 tmp = min(top, min(middle, bottom)); uchar8 out = row_reduce_min_3(tmp); #elif defined(MAX) uchar16 tmp = max(top, max(middle, bottom)); uchar8 out = row_reduce_max_3(tmp); #elif defined(MEDIAN) uchar8 p0 = top.s01234567; uchar8 p1 = top.s12345678; uchar8 p2 = top.s23456789; uchar8 p3 = middle.s01234567; uchar8 p4 = middle.s12345678; uchar8 p5 = middle.s23456789; uchar8 p6 = bottom.s01234567; uchar8 p7 = bottom.s12345678; uchar8 p8 = bottom.s23456789; uchar8 out = sort9(p0, p1, p2, p3, p4, p5, p6, p7, p8); #else /* MIN or MAX or MEDIAN */ #error "Unsupported filter function" #endif /* MIN or MAX or MEDIAN */ // Store result vstore8(out, 0, dst.ptr); }