回答編集履歴
2
修正
test
CHANGED
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@@ -132,7 +132,7 @@
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132
132
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133
133
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// if(_img[x] == 255){
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134
134
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135
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-
for(int x = 0
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135
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+
for(int x = 0, width = img.cols ; x < width; x++){
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136
136
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137
137
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if(img( y, x ) == 255){
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138
138
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1
追記
test
CHANGED
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@@ -44,7 +44,7 @@
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44
44
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45
45
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for(int x = 0 ; x < img.cols; x++){
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46
46
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47
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-
if(img.at( y, x ) == 255){
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47
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+
if(img.at<uchar>( y, x ) == 255){
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48
48
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49
49
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count++;
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50
50
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@@ -89,3 +89,89 @@
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89
89
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90
90
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91
91
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とするだけですよ
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92
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+
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93
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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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94
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95
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96
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97
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---
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98
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99
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100
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101
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**追記**
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102
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103
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Mat1b つまり Mat_<uchar>を使うと
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104
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105
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```c++
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106
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107
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#include <stdio.h>
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108
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109
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#include "opencv/cv.h"
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110
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111
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#include "opencv/highgui.h"
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112
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113
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using namespace cv;
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114
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115
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116
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117
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int main(){
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118
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119
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Mat1b img = imread("sample.jpg", IMREAD_GRAYSCALE);
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120
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121
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int count=0;
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122
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123
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double x_g=0.0,y_g=0.0;
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124
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125
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for(int y = 0, height = img.rows; y < height; y++){
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126
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127
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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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128
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129
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// const uchar *_img = img[y];
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130
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131
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// for(int x = 0, width = img.cols ; x < width; x++){ //変化なし
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132
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133
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// if(_img[x] == 255){
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134
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135
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for(int x = 0 ; x < img.cols; x++){
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136
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137
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if(img( y, x ) == 255){
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138
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139
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count++;
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140
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141
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x_g += x;
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142
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143
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y_g += y;
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144
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145
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}
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146
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147
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}
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148
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149
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}
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150
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151
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x_g /= conut;
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152
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153
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y_g /= count;
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154
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155
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156
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157
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Point2f mc = Point2f( x_g, y_g);
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158
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159
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160
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161
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circle( img, mc, 4, Scalar(100), 2, 4);
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162
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163
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164
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165
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printf("x: %f y: %f", mc.x, mc.y);
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166
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167
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168
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169
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imshow("img",img);
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170
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171
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waitKey(0);
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172
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173
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return 0;
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174
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+
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175
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}
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176
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+
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177
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```
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