Abstract: An image interpolation circuit is able to connect linearly the discontinued space between two coordinate points input by an outside input unit of which transmission speed is slow. After comparing two coordinate points input by the outside input unit, if they are different, the absolute values .DELTA.X and .DELTA.Y of two coordinate values are compared each other. And then, a bigger interpolation output is up or down by means of programmable up and down counter 12, 13. Such a up or down is repeated until a value totaling smaller absolute values is same as or bigger than a bigger absolute value, and then after reestablishing a beginning value, the processes are repeatedly executed. So that the linear interpolation value between two coordinate points can be obtained from a construction of hardware, and a processing speed is faster than a processing method using the prior software, thereby easily matching with other peripheral circuits because of the construction of the hardware.

Abstract: A process for producing cyclodextrin from raw starch by mixing a culture supernatant of cyclodextrin gylcosyltransferase-producing microorganism as an enzyme source and a raw starch as a substrate, and stirring the mixture in the presence of an attrition milling media in an attrition milling bioreactor, whereby the reaction is carried out.