openni niviewer问题汇总

1）测试中如发现Niviewer显示有问题，而用ImageJ看保存的数据没有问题，可能原因是niviewer渲染有问题，就要检查系统的驱动有没有安装，比如windows下显卡驱动是否安装，如在linux下虚拟机也有这样的问题，不支持分辨率的切换；2）linux如何查看usb的设备的信息know a usb device's endpointAfter you have claimed the de

smilestone322

2574人浏览 · 2018-05-05 12:27:18

smilestone322 · 2018-05-05 12:27:18 发布

1）测试中如发现Niviewer显示有问题，而用ImageJ看保存的数据没有问题，可能原因是niviewer渲染有问题，就要检查系统的驱动有没有安装，比如windows下显卡驱动是否安装，如在linux下虚拟机也有这样的问题，不支持分辨率的切换；

2）linux如何查看usb的设备的信息

know a usb device's endpoint

After you have claimed the device, run this (where $ represents the terminal entry point):

$ sudo lsusb -v -d 16c0:05df

Where 16c0:05df are your vendor and product ids separated by a colon. (If you don't know these, type lsusb and figure out which device is yours by unplugging and re-running lsusb)

3）

error while loading shared libraries; cannot open shared object file: No such file or directory

sudo ln -s /usr/lib/x86_64-linux-gnu/libfreetype.so.6.10.1 /usr/lib/libfreetype.so.6 and now evince runs fine.

需要建立一个符号链接

down vote

I was able to fix this problem however I'm still not entirely sure why this was a problem in the first place.

After running strace, I saw open("/usr/local/lib/libfreetype.so.6", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied) which doesn't quite make sense since other programs (without sudo powers) which depended on libfreetype were able to run, and the permissions are set for read/write for all, also running evince under sudo didn't help either.

My apt-get of libfreetype placed the library in /usr/lib/x86_64-linux-gnu/libfreetype.so.6 but for some reason evince wasn't checking that folder (even though it was added to LD_LIBRARY_PATH). However I created a symbolic link to a folder which it does check sudo ln -s /usr/lib/x86_64-linux-gnu/libfreetype.so.6.10.1 /usr/lib/libfreetype.so.6 and now evince runs fine.