回答編集履歴
2
修正
answer
CHANGED
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@@ -65,7 +65,7 @@
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65
65
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// const uchar *_img = img[y];
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66
66
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// for(int x = 0, width = img.cols ; x < width; x++){ //変化なし
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67
67
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// if(_img[x] == 255){
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68
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-
for(int x = 0 ; x <
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68
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+
for(int x = 0, width = img.cols ; x < width; x++){
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69
69
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if(img( y, x ) == 255){
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70
70
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count++;
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71
71
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x_g += x;
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1
追記
answer
CHANGED
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@@ -21,7 +21,7 @@
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21
21
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double x_g=0.0,y_g=0.0;
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22
22
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for(int y = 0 ; y < img.rows; y++){
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23
23
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for(int x = 0 ; x < img.cols; x++){
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24
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-
if(img.at( y, x ) == 255){
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24
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+
if(img.at<uchar>( y, x ) == 255){
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25
25
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count++;
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26
26
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x_g += x;
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27
27
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y_g += y;
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@@ -43,4 +43,47 @@
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43
43
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}
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44
44
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```
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45
45
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46
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-
とするだけですよ
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46
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+
とするだけですよ
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47
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+
**修正:** 指摘を受け、img.at( y, x )をimg.at<uchar>( y, x )に変更
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48
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+
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49
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+
---
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50
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+
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51
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+
**追記**
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52
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+
Mat1b つまり Mat_<uchar>を使うと
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53
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+
```c++
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54
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+
#include <stdio.h>
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55
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+
#include "opencv/cv.h"
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56
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+
#include "opencv/highgui.h"
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57
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+
using namespace cv;
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58
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+
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59
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int main(){
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60
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Mat1b img = imread("sample.jpg", IMREAD_GRAYSCALE);
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61
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int count=0;
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62
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+
double x_g=0.0,y_g=0.0;
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63
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for(int y = 0, height = img.rows; y < height; y++){
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64
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// パフォーマンス的には↓3行を置き換えた方が速い
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65
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+
// const uchar *_img = img[y];
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66
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+
// for(int x = 0, width = img.cols ; x < width; x++){ //変化なし
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67
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+
// if(_img[x] == 255){
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68
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+
for(int x = 0 ; x < img.cols; x++){
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69
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if(img( y, x ) == 255){
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70
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count++;
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71
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+
x_g += x;
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72
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+
y_g += y;
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73
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+
}
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74
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+
}
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75
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+
}
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76
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x_g /= conut;
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77
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y_g /= count;
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78
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+
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79
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Point2f mc = Point2f( x_g, y_g);
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80
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+
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81
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+
circle( img, mc, 4, Scalar(100), 2, 4);
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82
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+
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83
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printf("x: %f y: %f", mc.x, mc.y);
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84
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+
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85
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+
imshow("img",img);
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86
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+
waitKey(0);
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87
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+
return 0;
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88
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+
}
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89
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+
```
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