1 /*
2 * Copyright (c) 2017 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #include "Histogram.h"
25
26 #include "Utils.h"
27 #include "arm_compute/core/Helpers.h"
28
29 namespace arm_compute
30 {
31 namespace test
32 {
33 namespace validation
34 {
35 namespace reference
36 {
37 template <typename T>
histogram(const SimpleTensor<T> & src,size_t num_bins,int32_t offset,uint32_t range)38 SimpleTensor<uint32_t> histogram(const SimpleTensor<T> &src, size_t num_bins, int32_t offset, uint32_t range)
39 {
40 SimpleTensor<uint32_t> dst(TensorShape(num_bins), DataType::U32);
41
42 // Clear the distribution
43 for(size_t element_idx = 0; element_idx < num_bins; ++element_idx)
44 {
45 dst[element_idx] = 0;
46 }
47
48 // Create the histogram
49 for(int element_idx = 0; element_idx < src.num_elements(); ++element_idx)
50 {
51 if((offset <= src[element_idx]) && (src[element_idx] < (offset + range)))
52 {
53 const int index = (src[element_idx] - offset) * num_bins / range;
54 dst[index]++;
55 }
56 }
57
58 return dst;
59 }
60
61 template SimpleTensor<uint32_t> histogram(const SimpleTensor<uint8_t> &src, size_t num_bins, int32_t offset, uint32_t range);
62 } // namespace reference
63 } // namespace validation
64 } // namespace test
65 } // namespace arm_compute
66