(3)Photogrammetryprocedure Ithinkit'salittledifficultinthephotogrammetryprocess.The selectionofpicturesneedstotakepicturesofdifferentanglesto form,otherwiseitwillfail.Weshouldchoosemoremulti-angle photostoimprovethequalityofphotography,suchaschangingthe pixeltoahigherdevice.