回答編集履歴
1
追記
answer
CHANGED
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@@ -4,7 +4,7 @@
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4
4
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std::vector<cv::KeyPoint> keypoints;
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5
5
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cv::Mat descriptors;
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6
6
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7
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-
auto img = cv::imread(
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7
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+
const auto img = cv::imread(
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8
8
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R"""(C:...\Lenna.png)"""
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9
9
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);
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10
10
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@@ -23,4 +23,15 @@
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23
23
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24
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return 0;
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25
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}
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26
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+
```
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27
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+
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28
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+
添え字も同時に獲得したいなら、こんな感じ。
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29
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+
```C++
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30
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+
const auto& size = descriptors.size();
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31
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for(int y = 0, end_y = size.height; y < end_y; ++y) {
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32
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for(int x = 0, end_x = size.width; x < end_x; ++x) {
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33
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std::cout <<
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34
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static_cast<int>(descriptors.at<unsigned char>(y, x)) << " ";
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35
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}
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36
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}
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26
37
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```
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