• 缁艰堪:
  • OpenCV鏈夐拡瀵圭煩闃垫搷浣滅殑C璇█鍑芥暟. 璁稿鍏朵粬鏂规硶鎻愪緵浜嗘洿鍔犳柟渚跨殑C++鎺ュ彛锛屽叾鏁堢巼涓嶰penCV涓€鏍?
  • OpenCV灏嗗悜閲忎綔涓?缁寸煩闃靛鐞?
  • 鐭╅樀鎸夎瀛樺偍锛屾瘡琛屾湁4瀛楄妭鐨勬牎鏁?
• 鍒嗛厤鐭╅樀绌洪棿:

  CvMat* cvCreateMat(int rows, int cols, int type);
  
   type: 鐭╅樀鍏冪礌绫诲瀷. 鏍煎紡涓篊V_<bit_depth>(S|U|F)C<number_of_channels>.  
     渚嬪: CV_8UC1 琛ㄧず8浣嶆棤绗﹀彿鍗曢€氶亾鐭╅樀, CV_32SC2琛ㄧず32浣嶆湁绗﹀彿鍙岄€氶亾鐭╅樀.
     渚嬬▼:
     CvMat* M = cvCreateMat(4,4,CV_32FC1);

• 閲婃斁鐭╅樀绌洪棿:

  CvMat* M = cvCreateMat(4,4,CV_32FC1);
  cvReleaseMat(&M);

• 澶嶅埗鐭╅樀:

  CvMat* M1 = cvCreateMat(4,4,CV_32FC1);
  CvMat* M2;
  M2=cvCloneMat(M1); 

• 鍒濆鍖栫煩闃?

  double a[] = { 1,   2,   3,   4,
    5,   6,   7,   8,
                  9, 10, 11, 12 };
  
  CvMat Ma=cvMat(3, 4, CV_64FC1, a);
  鍙︿竴绉嶆柟娉?

  CvMat Ma;
  cvInitMatHeader(&Ma, 3, 4, CV_64FC1, a);

• 鍒濆鍖栫煩闃典负鍗曚綅闃?

  CvMat* M = cvCreateMat(4,4,CV_32FC1);
  cvSetIdentity(M); // 杩欓噷浼间箮鏈夐棶棰橈紝涓嶆垚鍔?/pre>
      

• 鍋囪闇€瑕佸瓨鍙栦竴涓?缁存诞鐐圭煩闃电殑绗?i,j)涓厓绱?
• 闂存帴瀛樺彇鐭╅樀鍏冪礌:

• cvmSet(M,i,j,2.0); // Set M(i,j)
  t = cvmGet(M,i,j); // Get M(i,j)

• 鐩存帴瀛樺彇锛屽亣璁句娇鐢?-瀛楄妭鏍℃:

  CvMat* M     = cvCreateMat(4,4,CV_32FC1);
  int n        = M->cols;
  float *data = M->data.fl;
  data[i*n+j] = 3.0;

• 鐩存帴瀛樺彇锛屾牎姝ｅ瓧鑺備换鎰?

  CvMat* M     = cvCreateMat(4,4,CV_32FC1);
  int    step   = M->step/sizeof(float);
  float *data = M->data.fl;
  
  
  
  (data+i*step)[j] = 3.0;

• 鐩存帴瀛樺彇涓€涓垵濮嬪寲鐨勭煩闃靛厓绱?

  double a[16];
  CvMat Ma = cvMat(3, 4, CV_64FC1, a);
  a[i*4+j] = 2.0; // Ma(i,j)=2.0;

• 鐭╅樀-鐭╅樀鎿嶄綔:

  CvMat *Ma, *Mb, *Mc;
  cvAdd(Ma, Mb, Mc);       // Ma+Mb    -> Mc
  cvSub(Ma, Mb, Mc);       // Ma-Mb    -> Mc
  cvMatMul(Ma, Mb, Mc);    // Ma*Mb    -> Mc

• 鎸夊厓绱犵殑鐭╅樀鎿嶄綔:

  CvMat *Ma, *Mb, *Mc;
  cvMul(Ma, Mb, Mc);       // Ma.*Mb   -> Mc
  cvDiv(Ma, Mb, Mc);       // Ma./Mb   -> Mc
  cvAddS(Ma, cvScalar(-10.0), Mc); // Ma.-10 -> Mc

• 鍚戦噺涔樼Н:

  double va[] = {1, 2, 3};
  double vb[] = {0, 0, 1};
  double vc[3];
  
  CvMat Va=cvMat(3, 1, CV_64FC1, va);
  CvMat Vb=cvMat(3, 1, CV_64FC1, vb);
  CvMat Vc=cvMat(3, 1, CV_64FC1, vc);
  
  double res=cvDotProduct(&Va,&Vb); // 鐐逛箻:    Va . Vb -> res
  cvCrossProduct(&Va, &Vb, &Vc);     // 鍚戦噺绉? Va x Vb -> Vc
  end{verbatim}

  娉ㄦ剰 Va, Vb, Vc 鍦ㄥ悜閲忕Н涓悜閲忓厓绱犱釜鏁伴』鐩稿悓.

• 鍗曠煩闃垫搷浣?

  CvMat *Ma, *Mb;
  cvTranspose(Ma, Mb);       // transpose(Ma) -> Mb (涓嶈兘瀵硅嚜韬繘琛岃浆缃?
  CvScalar t = cvTrace(Ma); // trace(Ma) -> t.val[0] 
  double d = cvDet(Ma);      // det(Ma) -> d
  cvInvert(Ma, Mb);          // inv(Ma) -> Mb 

• 闈為綈娆＄嚎鎬х郴缁熸眰瑙?

  CvMat* A   = cvCreateMat(3,3,CV_32FC1);
  CvMat* x   = cvCreateMat(3,1,CV_32FC1);
  CvMat* b   = cvCreateMat(3,1,CV_32FC1);
  cvSolve(&A, &b, &x);     // solve (Ax=b) for x 

• 鐗瑰緛鍊煎垎鏋?閽堝瀵圭О鐭╅樀):

  CvMat* A   = cvCreateMat(3,3,CV_32FC1);
  CvMat* E   = cvCreateMat(3,3,CV_32FC1);
  CvMat* l   = cvCreateMat(3,1,CV_32FC1);
  cvEigenVV(&A, &E, &l);   // l = A鐨勭壒寰佸€?(闄嶅簭鎺掑垪)
                        // E = 瀵瑰簲鐨勭壒寰佸悜閲?(姣忚)

• 濂囧紓鍊煎垎瑙VD:

  CvMat* A   = cvCreateMat(3,3,CV_32FC1);
  CvMat* U   = cvCreateMat(3,3,CV_32FC1);
  CvMat* D   = cvCreateMat(3,3,CV_32FC1);
  CvMat* V   = cvCreateMat(3,3,CV_32FC1);
  cvSVD(A, D, U, V, CV_SVD_U_T|CV_SVD_V_T); // A = U D V^T

  鏍囧彿浣垮緱 U 鍜?V 杩斿洖鏃惰杞疆(鑻ユ病鏈夎浆缃爣鍙凤紝鍒欐湁闂涓嶆垚鍔?!!).

鑷?a href="http://hi.baidu.com/wmsunny/blog/item/f68877fb7854908f9f514654.html">http://hi.baidu.com/wmsunny/blog/item/f68877fb7854908f9f514654.html