Electronic photographing apparatus
First Claim
1. An electronic photographing apparatus, comprising:
- electronic photographing means for converting an image to be photographed into a video signal including retracing signal components;
binary coding means for converting the video signal to a binary signal in accordance with the level of the video signal with respect to one of first and second reference levels which are close tosaturated white and black levels of the video signal, said binary signal including an image component representing at least one poor quality portion of an image reproduced from said video signal and corresponding to one of overexposure and underexposure;
signal processing means for converting the binary signal of said binary coding means to a binary video signal; and
display means for displaying the binary image component representing said poor quality portion of the image which is obtained from the binary video signal of said signal processing means as a two-dimensional optical image.
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Accused Products
Abstract
An electronic photographing apparatus including a photosensor for converting an optical image, which enters through an objective lens, to an electric signal, and two comparators to which a video signal obtained by signal-processing the electric signal is supplied. Supplied to the comparators, respectively, are a reference voltage slightly lower than the saturation level of the video signal and a reference voltage slightly higher than the black level of the video signal. The comparators convert the video signal to a binary signal according to the reference voltages. The binary signals are supplied to a video signal processing circuit and are converted to a binary video signal. When the binary video signal is supplied to the display of an electric finder, an image which is over- or/and underexposed is displayed on the display. When the binary signal is supplied to an automatic exposure unit, the exposure of the scene is automatically controlled according to the over- or/and underexposure.
32 Citations
14 Claims
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1. An electronic photographing apparatus, comprising:
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electronic photographing means for converting an image to be photographed into a video signal including retracing signal components; binary coding means for converting the video signal to a binary signal in accordance with the level of the video signal with respect to one of first and second reference levels which are close to saturated white and black levels of the video signal, said binary signal including an image component representing at least one poor quality portion of an image reproduced from said video signal and corresponding to one of overexposure and underexposure; signal processing means for converting the binary signal of said binary coding means to a binary video signal; and display means for displaying the binary image component representing said poor quality portion of the image which is obtained from the binary video signal of said signal processing means as a two-dimensional optical image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electronic photographing apparatus, comprising:
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electronic photographing means for converting an image to be photographed to a video signal including retracing signal components; binary coding means for converting the video signal to a binary signal in accordance with the level of said video signal with respect to one of first and second reference levels which are close to saturated white and black levels of the video signal, respectively, said binary signal including an image component representing at least one poor quality portion of an image reproduced from said video signal and corresponding to one of overexposure and underexposure; and means for automatically adjusting the exposure responsive to the binary signal of said binary coding means. - View Dependent Claims (13, 14)
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Specification