如何在JavaCV中迭代cvMat矩阵?

时间:2012-05-17 18:17:56

标签: opencv matrix loops javacv

我有一个IplImage,我在Matrix中转换,现在我想逐个单元地迭代。

CvMat mtx = new CvMat(iplUltima);
for (int i = 0; i < 100; i++) {
     //I need something like mtx[0][i] = someValue;
}

3 个答案:

答案 0 :(得分:3)

我发了!!我分享一下:

CvMat mtx = new CvMat(iplUltima);   

for (int i = 0; i < 100; i++) {
    for (int j = 0; j < 100; j++) {
         opencv_core.cvSet2D(mtx, i, j, CvScalar.ONE);
    }
}
iplUltima = new IplImage (mtx); 

其中i = row且j = column

答案 1 :(得分:1)

首先,您需要从JavaCV导入以下内容:

import com.googlecode.javacv.cpp.opencv_core.CvMat;

import static com.googlecode.javacv.cpp.opencv_core.CV_32F;

主程序:

int rows = 2;
int cols = 2;

CvMat Tab = CvMat.create( rows, cols, CV_32F );

// Manually fill the table
Tab.put(0, 0, 1);
Tab.put(0, 1, 2);
Tab.put(1, 0, -3);
Tab.put(1, 1, 4);

// Iterate through its elements and print them 
for(int i=0;i<rows;i++){
   for (int j =0;j<cols;j++){
    System.out.print(" "+ Tab.get(i,j) );
    }
   System.out.println("\n");
}

答案 2 :(得分:-1)

我没有安装Java,我无法检查此解决方案,但我认为它应该可以正常工作。

CvMat mtx = new CvMat(iplUltima);
val n     = mtx.rows * mtx.cols * mtx.channels

for (i <- 0 until n) {
    // Put your pixel value, for example 200
    mtx.put(i, 200)
}

Here是有关javaCV中像素访问的参考。