A method of performing protocol specific operations on a packet passing through a connection point on a computer network. The thin metal films of at least two layers having a high electric conductivity in the optical waveguide device can generate a combined surface plasmon mode and propagate the generated surface plasmon mode in the length direction of the thin metal films. Each article is fastened with the aid of a fastening device on a skid which interacts with the transport system. The banking service uses a common full text and individual full texts used for banking transactions, prepared through the smart card information and an input of the mobile phone. Then, the method produces, by using the window function and the optical transfer function, an image restoration filter to perform the image restoration process on the lower frequency side band of the input image and to restrict the image restoration process on the higher frequency side band thereof, and performs the image restoration process using the image restoration filter.