使用dlibs load_image_dataset加载一组图像时,如下所示:
//------------
command_line_parser parser;
parser.parse(argc, argv); //inputs argc, argv as defined by main where argv is an .xml containing all file locations
dlib::array<array2d<rgb_pixel> > images;
std::vector<std::vector<rectangle> > object_locations, ignore;
cout << "Loading image dataset from metadata file " << parser[1] << endl;
ignore = load_image_dataset(images, object_locations, parser[1]);
cout << "Number of images loaded: " << images.size() << endl;
//---------------
我收到以下错误:
"dlib::array2d<T, mem_manager> &dlib::array2d<T, mem_manager>::operator=(dlib::array2d<T, mem_manager> &) [with T=dlib::rgb_pixel, mem_manager=dlib::default_memory_manager]" (declared at line 320 of "C:\..path-to-dlib...\dlib-18.16\dlib\..\dlib/image_processing/../image_processing/../matrix/../array2d/array2d_kernel.h") is inaccessible
如果我尝试这样存储“图像”中的单个图像:
//--------
array2d<rgb_pixel> img;
img = images[i];
//-----------
但如果我只显示它,则没有错误:
//------
image_window image_i(images[i], "Image i");
//---------
发生了什么事,我该如何解决?
最佳答案
array2d在设计上是不可复制的,因为复制图像非常昂贵,并且几乎总是不必要的。如果要移动图像,请使用swap()。如果确实需要复制图像,则可以使用assign_image()函数,也可以使用矩阵对象(可复制)来表示图像,而不是array2d。
但实际上,不要不必要地复制图像。