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Electronic endoscope apparatus having different image processing characteristics for a moving image and a still image

  • US 5,034,888 A
  • Filed: 10/11/1990
  • Issued: 07/23/1991
  • Est. Priority Date: 02/26/1988
  • Status: Expired due to Term
First Claim
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1. An electronic endoscope apparatus comprising:

  • (a) an electronic endoscope includingan elongated inserting section,an objective optical system disposed at a front end of said inserting section for projecting and focusing illuminating light, andan imaging device for photoelectrically converting an optical image obtained by said objective optical system;

    (b) drive signal generating means for outputting a drive signal for causing an image signal to be read from said imaging device;

    (c) signal processing means for producing a standard video signal from the image signal read from said imaging device by applying said drive signal;

    (d) display means for providing a display of said standard video signal;

    (e) memory means for temporarily storing said video signal, said memory means constituting a part of said signal processing means;

    (f) a freezing switch for stopping input of said video signal into said memory means and for causing said memory means to repetitively output an identical still image signal;

    (g) outline emphasis means for emphasizing an outline of at least one signal read from said memory means; and

    (h) outline emphasis characteristic switching means for outputting a switching signal to change outline emphasis characteristics of said outline emphasis means in synchronization with the operation of said freezing switch.

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