Results 2 issues of yxandam

when i train the net on my dataset, i can not get a good result . ![tim 20180423133820](https://user-images.githubusercontent.com/20332732/39108835-b8b28ab4-46fc-11e8-844e-2b12f0c07d3e.png) ![tim 20180423133832](https://user-images.githubusercontent.com/20332732/39108836-b8fd6a2a-46fc-11e8-8a7c-fbe54c5aae44.png) ![tim 20180423133850](https://user-images.githubusercontent.com/20332732/39108838-b949bc22-46fc-11e8-93e7-a7f6ada9b2ac.png) ![tim 20180423133759](https://user-images.githubusercontent.com/20332732/39108833-b81c1476-46fc-11e8-94a7-16ea3ff45f6b.png) my img size is 3000*2000