使用开放式CV迭代器段落错误

Question

我想要做一些像eigenfaces但有不同的图像（不是面孔）。我有一个图像矢量，images。从这些图像中，我想制作一个Mat对象，其中每个行包含一个作为行向量写出的图像，其中包含data。这是我试图做的：

// This is basically a matrix that needs to have a bunch of images as rows. 
Mat data(numImages, IMAGE_SIZE * IMAGE_SIZE, CV_8UC1); 
// I also replaced CV_8U by images[0].type() and CV_8U. no change 
MatIterator_<unsigned short> iter = data.begin<unsigned short>(), 
          iter_end = data.end<unsigned short>(), 
          iter2; 

for (i = 0; i < numImages; ++i) 
{ 
    MatIterator_<unsigned short> begin = images[i].begin<unsigned short>(); 
    MatIterator_<unsigned short> end = images[i].end<unsigned short>(); 
    for (iter2 = begin; iter2 != end; iter2++) 
    { 
     *iter = *iter2; // Segfault is here. 
     if (iter != iter_end) // safety check 
      iter++; 
     else 
      perror("Screwed!\n"); // This does not execute! 
    } 
} 

帮助！

谢谢！

Answer 1

我认为在你的矩阵中每个字段有1个字节（CV_8UC1），但你的迭代器是“无符号短”迭代器。无符号短通常有2个字节。将其更改为

data.begin<unsigned char>() 

还要检查stdint.h：http://en.wikipedia.org/wiki/Stdint.h