Image processing apparatus with improved gamma-correction
First Claim
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1. An image processing apparatus comprising:
- illumination means for illuminating an original image, said illumination means being capable of selecting a light intensity for irradiating the original image;
photosensing means for reading the original image illuminated by said illuminations means to produce an electric data signal; and
conversion means for converting characteristics of the data signal from said photosensing means into different characteristics, said conversion means having a plurality of modes for data conversion, said modes being changed over in accordance with the selected light intensity with which the original image is irradiated.
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Abstract
An image processing apparatus comprises an illumination device for illuminating an original image, a photosensing device for converting the illuminated original image to an electrical signal and a conversion device for converting the output data of the photosensing device. The illumination device has a variable light intensity relative to the original image, and the conversion device changes a data conversion mode between a first mode and a second mode in accordance with the light illumination of the illumination device.
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14 Claims
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1. An image processing apparatus comprising:
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illumination means for illuminating an original image, said illumination means being capable of selecting a light intensity for irradiating the original image; photosensing means for reading the original image illuminated by said illuminations means to produce an electric data signal; and conversion means for converting characteristics of the data signal from said photosensing means into different characteristics, said conversion means having a plurality of modes for data conversion, said modes being changed over in accordance with the selected light intensity with which the original image is irradiated. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An image processing apparatus comprising:
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means for producing an image signal representing an original image, said producing means having first and second production modes for producing first and second signals in first and second density ranges, respectively, a timing of image production in said first mode being different from a timing of image production in said second mode; means for converting characteristics of the image signal into different characteristics, said converting means having first and second conversion modes which are changed over in accordance with said first or second production mode, respectively; and means for forming an image by utilizing both a first image signal from said producing means converted in said first conversion mode and a second image signal from said producing means converted in said second conversion mode. - View Dependent Claims (9, 10, 11, 12)
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13. An image processing apparatus comprising:
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means for illuminating an original image, said illuminating means being capable of selecting a first or a second light intensity; means for controlling said illuminating means so that said first light intensity is selected relating to a first density area of the original and said second light intensity is selected relating to a second density area of the original; and means for converting an original image illuminated by said illumination means into an image signal. - View Dependent Claims (14)
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Specification