画像出力装置の試作とその応用
1973 年 42 巻 11 号 p. 1091-1099
詳細
1973 年 42 巻 11 号 p. 1091-1099
This paper describes the development of a digital image processor.
With this device, the dataprocessed by a large computer (FACOM 230-60) and stored in the magnetic tape can be displayed on the cathode ray tube off-line operation with a com-puter.
Some of the characteristics of the image processor are given as follows:
(1) Digital scanning plotting is performed with high accuracy (better than ±0.1% of full scale) and high speed (about 1000 points per second), though the beam deflection is con-trolled by the current in the deflection yoke.
(2) Brightness modulation is obtained by using the method of pulse width modulation.
Owing to this method, various kinds of correction (for example, correction of H-D curve of the film) can be very easily performed.
(3) Our device dose not use buffer memories and is characterized by construction simpli-city and low cost.
Developed digital image processor can find applications in such fields as digital picture processing, synthesis of computer generated holograms and kinoforms. The two latter applications are given in this paper.
The performance of this device is also checked by testing the reconstructed image quality from them.
