Program Listing for File xf_integral_image.hpp
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/*
* Copyright 2019 Xilinx, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _XF_INTEGRAL_IMAGE_HPP_
#define _XF_INTEGRAL_IMAGE_HPP_
typedef unsigned short uint16_t;
#include "hls_stream.h"
#include "../common/xf_common.hpp"
#include "../common/xf_utility.hpp"
namespace xf {
namespace cv {
template <int SRC_TYPE, int DST_TYPE, int ROWS, int COLS, int NPC, int WORDWIDTH_SRC, int WORDWIDTH_DST, int TC>
void XFIntegralImageKernel(xf::cv::Mat<SRC_TYPE, ROWS, COLS, NPC>& _src_mat,
xf::cv::Mat<DST_TYPE, ROWS, COLS, NPC>& _dst_mat,
uint16_t height,
uint16_t width) {
// clang-format off
#pragma HLS inline
// clang-format on
XF_SNAME(XF_32UW) linebuff[COLS];
uint32_t cur_sum;
ap_uint<22> prev;
ap_uint<13> i, j;
RowLoop:
for (i = 0; i < height; i++) {
// clang-format off
#pragma HLS LOOP_TRIPCOUNT min=ROWS max=ROWS
// clang-format on
XF_SNAME(XF_8UW) val;
cur_sum = 0;
prev = 0;
ColLoop:
for (j = 0; j < width; j++) {
// clang-format off
#pragma HLS LOOP_TRIPCOUNT min=COLS max=COLS
#pragma HLS LOOP_FLATTEN OFF
#pragma HLS PIPELINE
// clang-format on
val = (XF_SNAME(XF_8UW))_src_mat.read(i * width + j);
prev = prev + val;
if (i == 0) {
cur_sum = prev;
} else {
cur_sum = (prev + linebuff[j]);
}
linebuff[j] = cur_sum;
_dst_mat.write(i * width + j, cur_sum);
} // ColLoop
} // rowLoop
}
// XFIntegralImage
template <int SRC_TYPE, int DST_TYPE, int ROWS, int COLS, int NPC>
void integral(xf::cv::Mat<SRC_TYPE, ROWS, COLS, NPC>& _src_mat, xf::cv::Mat<DST_TYPE, ROWS, COLS, NPC>& _dst_mat) {
// clang-format off
#pragma HLS INLINE OFF
// clang-format on
#ifndef __SYNTHESIS__
assert(((NPC == XF_NPPC1)) && "NPC must be XF_NPPC1");
assert(((_src_mat.rows <= ROWS) && (_dst_mat.cols <= COLS)) &&
"ROWS and COLS should be greater than or equal to input image size");
#endif
XFIntegralImageKernel<SRC_TYPE, DST_TYPE, ROWS, COLS, NPC, XF_WORDWIDTH(SRC_TYPE, NPC), XF_WORDWIDTH(DST_TYPE, NPC),
(COLS >> XF_BITSHIFT(NPC))>(_src_mat, _dst_mat, _src_mat.rows, _src_mat.cols);
}
} // namespace cv
} // namespace xf
#endif //_XF_INTEGRAL_IMAGE_HPP_