我想在文件中保存使用PCL API的PCLHistogramVisualizer获得的相同图像。
这是我需要在点[0]保存的直方图的变量。
pcl::PointCloud<Histogram<100> > hist;
我认为可以通过
来完成pcl::io::savePNGFile(path, *hist);
但这是我得到的错误
warning: ‘void pcl::io::savePNGFile(const string&, const pcl::PointCloud<PointT>&) [with T = pcl::Histogram<50>, std::string = std::basic_string<char>]’ is deprecated (declared at /usr/local/include/pcl-1.7/pcl/io/png_io.h:123): pcl::io::savePNGFile<typename T> (file_name, cloud) is deprecated, please use a new generic function pcl::io::savePNGFile (file_name, cloud, field_name) with "rgb" as the field name. [-Wdeprecated-declarations]
/usr/local/include/pcl-1.7/pcl/io/png_io.h:129:9: error: ‘const struct pcl::Histogram<50>’ has no member named ‘r’
/usr/local/include/pcl-1.7/pcl/io/png_io.h:130:9: error: ‘const struct pcl::Histogram<50>’ has no member named ‘g’
/usr/local/include/pcl-1.7/pcl/io/png_io.h:131:9: error: ‘const struct pcl::Histogram<50>’ has no member named ‘b’
所以我不能这样做，因为它没有任何rgb字段，但我真的需要保存大量的直方图，而且我无法一直截屏。