modify -img and add task directory for freeroi-sess
modify -img and add task directory for freeroi-sess

zhouguangfu/FreeROI,BNUCNL/FreeROI,sunshineDrizzle/FreeROI,BNUCNL/FreeROI,sealhuang/FreeROI,zhouguangfu/FreeROI,liuzhaoguo/FreeROI-1,sunshineDrizzle/FreeROI,sealhuang/FreeROI,liuzhaoguo/FreeROI-1