在OpenCV Mat图像中显示Vec3b像素值
我想知道Mat图像中Vec3b像素的值。 我不是一个真正的OpenCV专家。我的Vec3b是,如果我打印Vec3b:
Vec3b centralIntensity;
cx=70; cy=700;
centralIntensity = (Vec3b)imgTemp->at<Vec3b>(cx, cy);
cout<<"I:["<<cx<<","<<cy<<"]="<<centralIntensity<<endl;
我得到:
I:[70,700] = [150,162,160]
如果我打印单个值:
cout<<"***Uchar:["<<cx<<","<<cy<<"]="<<int(centralIntensity[0])<<","<<int(centralIntensity[1])<<","<<int(centralIntensity[2])<<endl;
我得到:
UCHAR:[70700] = 127,0,0
我注意到如果我改变坐标,最后的打印总是一样的。 由于我必须比较不同通道上的强度像素,因此在BGR通道中使用像素值的方法是什么?
***编辑1:这是我如何创建我的地毯图像(我已经有一个垫imgIn作为输入),我用另一种方式显示Vec3b:
Mat *imgTemp;
uchar cblue, blue, cgreen;
imgTemp = new Mat(imgIn->size(), CV_8UC3);
imgIn->convertTo(*imgTemp, CV_8UC3);
Vec3b centralIntensity;
centralIntensity = (Vec3b)imgTemp->at<Vec3b>(cx, cy);
cout<<"I:["<<cx<<","<<cy<<"]="<<centralIntensity<<endl;
centralIntensity[0] = cblue;
centralIntensity[1] = cgreen;
centralIntensity[2] = cred;
cout<<"I:["<<cx<<","<<cy<<"]="<<centralIntensity<<endl;
cout<<"***Uchar:["<<cx<<","<<cy<<"]="<<int(centralIntensity[0])<<","<<int(centralIntensity[1])<<","<<int(centralIntensity[2])<<endl;
cout<<"***Uchar:["<<cx<<","<<cy<<"]="<<int(cblue)<<","<<int(cgreen)<<","<<int(cred)<<endl;
我得到:
I:[70,700] = [150,162,160]
*** UCHAR:[70700] = 127,0,0
*** UCHAR:[70700] = 127,0,0
如果我改变坐标?
I:[300,400] = [109,123,105]
*** UCHAR:[300400] = 127,0,0
*** UCHAR:[300400] = 127,0,0
您正在使用未初始化的值cblue
, cred
, cgreen
覆盖centralIntensity
,其中将包含随机值。
只需纠正任务:
cblue = centralIntensity[0];
cgreen = centralIntensity[1];
cred = centralIntensity[2];
对于Vec3b,你可以这样做,
Mat image = imread("img_Path");
for(int y=0;y<img.rows;y++)
{
for(int x=0;x<img.cols;x++)
{
// get pixel
Vec3b color = image.at<Vec3b>(x, y);
//color.val[0] // B
//color.val[1] // G
//color.val[2] // R
}
}
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