| 摘要 |
PURPOSE:To obtain a reformed picture having high accuracy and high image resolution in a short time and with the real time processing by performing a picture reforming process causing the addition/subtraction arithmetic, the rotary arithmetic, etc., via the optical analog arithmetic. CONSTITUTION:A projection means 1 detects the projection data PD in the prescribed radiation direction. A sum totalizing means 4 secures the sum total in the direction equal to the radiation direction of the means 1 for the reformed picture which is optically read out by an optical reading means 3. Thus the sum total data RD is obtained. Then both data PD and RD are compared with each other by a comparison/correction means 5 for acquisition of the correction data AD. An optical writing means 6 applies a rotary process to a corrected function image so that this image is set in the direction equal to the radiation direction and writes optically said function image into a picture storing means 2. This function image is put on the reformed picture stored in the means 2 for correction. Then the irradiation direction of the means 1 is gradually shifted for sequential and optical correction of the reformed picture. Thus the approximation is secured to the internal information on a subject. |
