機器視覺之機器視覺算法之物體方位特征提取

文檔.文檔.#/8paramvalueparampara*/boolellipseFit(constQlmage&image,intvalue,ELLIPSE_PARA*para){if(image?isNull()||image?format()!=QImage::Format_Indexed8){returnfalse;}QPointFc=center(image,value);intwidth=image.width();intheight=image.height();doublen01=c.x();doublen10=c.y();doublemu20=0.0;doublemu02=0.0;doublemu11=0.0;intcount=0;for(introw=0;row<height;row++){constuchar*p=image.constScanLine(row);for(intcol=0;col<width;col++){if(p[col]==value){TOC\o"1-5"\h\zmu02+=(col-n01)*(col-n01);mu20+=(row-n10)*(row-n10);mu11+=(col-n01)*(row-n10);count++;}}}if(count==0){returnfalse;}mu20/=count;mu02/=count;mu11/=count;

doublet1=mu20+mu02;doublet2=mu20-mu02;doublet3=sqrt(t2*t2+4*mull*mull);doubler1=sqrt(2*(t1+t3));doubler2=sqrt(2*(t1-t3));doubletheta=-atan2(2*mull,mu02-mu20)/2.0;para->r1=r1;para->r2=r2;para->theta=theta;para->x_mean=n01;para->y_mean=n10;returntrue;}intmain(intargc,char*argv[]){QApplicationa(argc,argv);QImageimage('D:/test55.png");QImageimageGray=toGray(image);//imageGray=threshold(imageGray,128);ELLIPSE_PARApara;ellipseFit(imageGray,0,¶);qDebug()<<para?r1;qDebug()<<para?r2;qDebug()<<para.theta*180/3.14159;QPointFc(para?x_mean,para?y_mean);qDebug()<<c;QPainterpainter(&image);painter.setPen(Qt::red);painter.translate(c);painter.rotate(-para.theta*180/3.14159);painter.drawEllipse(QPointF(0,0),para?r1,p