Image pick-up apparatus with a shake reducing function
First Claim
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1. An image pick-up apparatus comprising:
- a pixel adding unit which generates a pixel addition image by executing a pixel addition process for an image shot by an image pick-up element;
a luminance obtaining unit which obtains a subject luminance;
a pixel addition ratio changing unit which changes a pixel addition ratio of the pixel addition process by the pixel adding unit from a ratio of 1 to a ratio other than 1, in accordance with the subject luminance obtained by the luminance obtaining unit;
a size setting unit which sets a pixel size at a time of image recording to a pixel size designated by a user;
an enlarging unit which enlarges a pixel size of the pixel addition image generated by the pixel adding unit in accordance with a predetermined enlarging ratio, when the pixel addition ratio is changed to a ratio other than 1 by the pixel addition ratio changing unit; and
an enlarging ratio changing unit which changes the predetermined enlarging ratio to an enlarging ratio at which the pixel size of the pixel addition image is enlarged to the pixel size set by the size setting unit, when the pixel addition ratio is changed to a plurality of ratios other than 1 by the pixel addition ratio changing unit.
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Abstract
When a hand shake reducing mode has been set for shooting a subject, an exposure is controlled in accordance with a program diagram (solid line) B for the shake reducing mode, which is different from a program diagram (broken line) A for a normal mode. In a state where a shutter speed is set to less than “ 1/80”, two-pixel addition and/or four-pixel addition is executed on an imaging signal to amplify subject luminance, raising ISO sensitivity. A shutter speed set to fall in a high speed range reduces deterioration in image quality due to hand shake and/or subject movement during a shooting operation.
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Citations
4 Claims
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1. An image pick-up apparatus comprising:
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a pixel adding unit which generates a pixel addition image by executing a pixel addition process for an image shot by an image pick-up element; a luminance obtaining unit which obtains a subject luminance; a pixel addition ratio changing unit which changes a pixel addition ratio of the pixel addition process by the pixel adding unit from a ratio of 1 to a ratio other than 1, in accordance with the subject luminance obtained by the luminance obtaining unit; a size setting unit which sets a pixel size at a time of image recording to a pixel size designated by a user; an enlarging unit which enlarges a pixel size of the pixel addition image generated by the pixel adding unit in accordance with a predetermined enlarging ratio, when the pixel addition ratio is changed to a ratio other than 1 by the pixel addition ratio changing unit; and an enlarging ratio changing unit which changes the predetermined enlarging ratio to an enlarging ratio at which the pixel size of the pixel addition image is enlarged to the pixel size set by the size setting unit, when the pixel addition ratio is changed to a plurality of ratios other than 1 by the pixel addition ratio changing unit. - View Dependent Claims (2, 3)
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4. An image processing method for an image pick-up apparatus which records an image for which a pixel addition process is executed, the method comprising:
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generating a pixel addition image by executing a pixel addition process for an image shot by an image pick-up element; obtaining a subject luminance; changing a pixel addition ratio of the pixel addition process from a ratio of 1 to a ratio other than 1, in accordance with the obtained subject luminance; setting a pixel size at a time of image recording to a pixel size designated by a user; enlarging a pixel size of the generated pixel addition image in accordance with a predetermined enlarging ratio, when the pixel addition ratio is changed to the ratio other than 1; and changing the predetermined enlarging ratio to an enlarging ratio at which the pixel size of the pixel addition image is enlarged to the set pixel size, when the pixel addition ratio is changed to a plurality of ratios other than 1.
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Specification