Method and device for creating pictures
First Claim
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1. A method for creating a picture comprising the steps of:
- exposing a light sensitive sensor adapted to be exposed by means of a rolling shutter to a series of exposures, each exposure being underexposed;
wherein the whole light sensitive sensor in each exposure is exposed simultaneously, for each exposure the method further comprising the steps of;
resetting all pixels of the light sensitive sensor with a mechanical global shutter closed;
opening the mechanical global shutter;
exposing the whole light sensitive sensor to light for the desired exposure time;
closing the mechanical global shutter; and
reading out the pixels values in a rolling mode.
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Abstract
The invention relates to a method and a device for creating an enhanced picture by means of several consecutive exposures. The method comprises the steps of: exposing a light sensitive sensor to a series of exposures, wherein the whole light sensitive sensor in each exposure is exposed simultaneously, and all the exposures of the series are combined to form a finished picture. Preferably, the exposures are combined with a correction for sharpness enhancement. The problem of motion distortion in an image stabilization system is solved by letting each exposure of the series be exposed by means of a global shutter.
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Citations
11 Claims
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1. A method for creating a picture comprising the steps of:
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exposing a light sensitive sensor adapted to be exposed by means of a rolling shutter to a series of exposures, each exposure being underexposed; wherein the whole light sensitive sensor in each exposure is exposed simultaneously, for each exposure the method further comprising the steps of; resetting all pixels of the light sensitive sensor with a mechanical global shutter closed; opening the mechanical global shutter; exposing the whole light sensitive sensor to light for the desired exposure time; closing the mechanical global shutter; and reading out the pixels values in a rolling mode. - View Dependent Claims (2, 3, 4, 5)
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6. A device for creating a picture comprising an optical system for exposing a light sensitive sensor adapted to be exposed by means of a rolling shutter, a mechanical global shutter capable of exposing the whole light sensitive sensor simultaneously, wherein:
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the optical system is arranged to expose the light sensitive sensor for a series of exposures, so that the whole light sensitive sensor in each exposure is exposed simultaneously, further each exposure being underexposed, and in that the device is arranged to combine all the exposures of the series to form a finished picture, the device is further arranged to perform the following steps for each exposure; resetting all pixels of the light sensitive sensor with the mechanical global shutter closed; opening the mechanical global shutter; exposing the whole light sensitive sensor to light for the desired exposure time; closing the mechanical global shutter; and reading out the pixels values in a rolling mode. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification