Image enlarging method and device

[54] IMAGE ENLARGING METHOD AND DEVICE

[75] Inventor: Akio Nakajima, Toyokawa, Japan

[73] Assignee: Minolta Camera Kabushiki Kaisha, Osaka, Japan

[21] Appl. No.: 852,439

[22] Filed: Apr. 15,1986

[30] Foreign Application Priority Data

Apr. 16, 1985 [JP] Japan 60-81913

Apr. 16, 1985 [JP] Japan 60-81914

[51] IntCL* G06F3/15

[52] US. CL 364/518; 340/799;

340/800

[58] Field of Search 364/518-522;

382/45, 47; 340/747, 798-800

[56] References Cited

U.S. PATENT DOCUMENTS

3,816,664 6/1974 Koch 381/30

4,370,524 1/1983 Hiraguri 381/29

4,545,070 10/1985 Miyagawa et al 382/48

4,555,801 11/1985 Miyagawa et al 382/45

4,631,751 12/1986 Anderson et al 382/47

4,675,811 6/1987 Kishi et al 364/200

4,682,243 7/1987 Hatayama 382/47

4,694,288 9/1987 Harada 340/747 X

4,695,966 9/1987 Takaura et al 364/521

Primary Examiner—Gary V. Harkcom
Assistant Examiner—H. R. Herndon
Attorney, Agent, or Firm—Price, Gess & Ubell

[57] ABSTRACT

A method and device for enlarging an image of digital data which is stored in a memory. The data consisting of one line of the image is read out from the memory and is written again in the memory with different ratio from a ratio of reading in order to enlarge the image. The entire data of the image stored in a certain area of the memory is shifted to another area thereof without interfering an enlargement procedure. The enlargement procedures are repeated plural times to obtain most adequate magnification for designated magnification.

12 Claims, 5 Drawing Sheets