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dlib C++ Library 17.42更新日志：
New Stuff:
&">nbsp; - Added the check_sub_option() method to the command line parser check
object.
- Added match_endings to the dir_nav utils.
- Added a set_current_dir() function.
- Added the distance_to_rect_edge() routine.
- Added support for user drawn rectangle overlays and selectable overlays
to the image_display widget.
Non-Backwards Compatible Changes:
Bug fixes:
- Fixed a bug in the image_display widget. If you switched it between
images of a different size while any kind of zoom was in effect
it could cause a segmentation fault.
下载地址：http://sourceforge.net/projects/dclib/files/dlib/v17.42/dlib-17.42.zip/download