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    Feedback image enhancement process
    22.
    发明授权
    Feedback image enhancement process 失效
    反馈图像增强过程

    公开(公告)号：US3615433A

    公开(公告)日：1971-10-26

    申请号：US3615433D

    申请日：1968-10-29

    申请人： SYLVANIA ELECTRIC PROD

    发明人： BIERNSON GEORGE A ,  EULING RAYMOND ,  JONES PAUL W

    IPC分类号： G03C5/08 ,  G03B27/00 ,  G03B27/72 ,  G03C5/02 ,  G03C5/04

    CPC分类号： G03C5/02

    摘要： A reiterative feedback image enhancement process for enhancing the details of photographic images. In accordance with a preferred embodiment of the invention, the feedback image enhancement process comprises three successive cycles of three successive steps (a), (b), and (c), followed by a final operation. In step (a) of the first cycle, a positive image is derived from an original negative image of a scene, in step (b) a blurred negative image is produced from the positive image, and in step (c) a mask image is produced from the blurred negative image. In each of the second and third cycles, a positive image is produced in step (a) from the original negative image and the mask image produced in the previous cycle, a blurred negative image is produced in step (b), and a mask image is produced in step (c). In the final operation, an enhanced positive image is produced from the original negative image and the mask image produced in the third cycle.