| 摘要 |
PURPOSE:To decrease noise without deteriorating an image of an tissue with movement by providing an arithmetic unit outputting an image data to be displayed by averaging a new image data and an image data of the preceding frame based on a correction factor calculated by a correction factor-calculating part. CONSTITUTION:A correction factor-calculating part 2 calculates a correction factor corresponding to a difference between an image data of the preceding frame recorded in an image recording part 1 and an input image data. As an arithmetic unit 3 outputs an image data to be displayed by averaging a new image data and an image data of the preceding frame, in a part where the difference between the image data is large, the amt. of correction from the preceding frame in the calculation of the correction factor and averaging is made small and in a part where the difference is small, the amt. of correction from the preceding frame can be made large. Therefore, it is possible to reduce noise without deteriorating an image of a tissue with movement. |
