求矩形顶点坐标（已经验证，放大图像会看起来误差很大，实际坐标值误差在个像素以内）

smallest_rectangle2 (SelectedRegions, Row, Column, Phi, Length1, Length2)

gen_rectangle2 (Rectangle, Row, Column, Phi, Length1, Length2)

tuple_cos (Phi, Cos)
tuple_sin (Phi, Sin)
dev_set_color('red')
dX := -Length1*Cos - Length2*Sin
dY := -Length1*Sin + Length2*Cos

RowLT:=Row-dY
ColumnLT:=Column+dX

gen_cross_contour_xld(CrossLT, RowLT, ColumnLT, 6, Phi)

dX := Length1*Cos - Length2*Sin
dY := Length1*Sin + Length2*Cos

RowRT:=Row-dY
ColumnRT:=Column+dX

gen_cross_contour_xld(CrossRT, RowRT, ColumnRT, 6, Phi)

dX:= Length1*Cos + Length2*Sin
dY := Length1*Sin - Length2*Cos

RowRB:=Row-dY
ColumnRB:=Column+dX

gen_cross_contour_xld(CrossRB, RowRB, ColumnRB, 6, Phi)

dX := -Length1*Cos + Length2*Sin
dY := -Length1*Sin - Length2*Cos

RowLB:=Row-dY
ColumnLB:=Column+dX

gen_cross_contour_xld(CrossLB, RowLB, ColumnLB, 6, Phi)