If there is only the physical object but no electronic model made with software such as UG or ProE, it needs to be aligned with the center of the product, and the distance must be selected appropriately, without the perspective of the view. It is generally recommended to use For better professional photography cameras, if the distance is far enough and you zoom in like this, you can avoid perspective to the greatest extent. If you use an ordinary point-and-shoot camera at home, it is more difficult to operate, and after taking the photo, you may need to use PhotoShop to process the perspective at the lower edge. .