| 摘要 |
PURPOSE:To make it possible to execute easy addition of image signals by frequencies at a low cost and high speed and to stress the images of the desired frequency band in a superposing method of radiation images. CONSTITUTION:Two image signals S1, S2 stored in memories 18A, 18 are inputted to an image processing means 19. The image signal S1 is convoluted by a filter which stresses the response of a high-frequency component and the image signal S2 by a filter which lowers the response of the high-frequency component material, respectively. The respective filters have such characteristics that the response characteristics of the desired frequency bands of the addition signal are stressed. The image signals S1, S2 subjected to the processing are inputted to an adding means 20 where the addition signal Sadd of the image signals S1, S2 is obtd. The addition signal Sadd is inputted to a reproducing means 21, such as CRT, where the signal is reproduced as a visible image. The image signals S1, S2 subjected to the processing described above are subjected to subtraction processing. |
