【opencv】獲取圖片某點畫素值的兩種方法
阿新 • • 發佈:2019-02-08
1. 通過指標訪問畫素值
2. 通過該畫素的座標獲得畫素值IplImage *Temp=*iterIplOri; uchar *dataaa=(uchar*)Temp->imageData; int step=Temp->widthStep/sizeof(uchar); int channals=Temp->nChannels; int r=0,g=0,b=0; for (int jj=Temp->height-1;jj>0;jj--) { for (int kk=0;kk<Temp->width;kk++) { r=dataaa[jj*step+kk*channals+0]; // g and b are zeros for gray image g=dataaa[jj*step+kk*channals+1]; b=dataaa[jj*step+kk*channals+2]; if (r>nTemp) { nTemp=r; } } }
IplImage *Temp=*iterIplOri;
// nTesty is y cordinate,nTestx is x cordinate
CvScalar pColor=cvGet2D(Temp,nTesty,nTestx);
int Pixl1=pColor.val[0];
int Pixl2=pColor.val[1];
int Pixl3=pColor.val[2];