Control of artificial lighting of a scene to reduce effects of motion in the scene on an image being acquired
First Claim
1. A method of controlling operation of an electronic imaging device to capture data of at least one image of a scene illuminated with at least one source of artificial light, wherein a magnitude of motion of the at least one image, and an acceleration of at least a portion of the at least one image, including a local acceleration of the at least one image, is ascertained prior to capturing data of the at least one image, and the ascertained magnitude of motion is used to set a magnitude of at least one of a duration, intensity or timing of a light pulse emitted by the at least one source of artificial light while capturing data of the at least one image, wherein the ascertained magnitude of motion and local acceleration of the at least one image is employed to determine initiating the capture of data of the at least one image.
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Accused Products
Abstract
Motion of an image of a scene being captured by a digital image acquisition device is detected and used to control parameters of illumination of the scene by a flash lamp that is typically built into the device. Parameters that may be controlled include the intensity, duration and timing of light emitted by the flash lamp. Such control of the flash illumination is preferably performed in conjunction with adjusting one or more exposure parameters used to capture an image. Such exposure parameters include duration, aperture and sensor gain. Motion blur caused by movement of the camera or by movement of an object within the scene being photographed is reduced by selecting appropriate exposure parameters and flash light characteristics.
64 Citations
51 Claims
- 1. A method of controlling operation of an electronic imaging device to capture data of at least one image of a scene illuminated with at least one source of artificial light, wherein a magnitude of motion of the at least one image, and an acceleration of at least a portion of the at least one image, including a local acceleration of the at least one image, is ascertained prior to capturing data of the at least one image, and the ascertained magnitude of motion is used to set a magnitude of at least one of a duration, intensity or timing of a light pulse emitted by the at least one source of artificial light while capturing data of the at least one image, wherein the ascertained magnitude of motion and local acceleration of the at least one image is employed to determine initiating the capture of data of the at least one image.
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16. A method of controlling operation of an electronic imaging device to capture data of at least one image of a scene with artificial lighting, comprising:
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determining, prior to capturing data of an image, a magnitude of motion and acceleration of the image, including a local acceleration of the image; calculating one or more exposure parameters including duration from at least the determined magnitude of image motion; calculating one or more illumination parameters of the artificial lighting of the scene from at least the determined magnitude of motion; and thereafter capturing data of the image by use of the calculated one or more exposure parameters and with artificial lighting of the scene having the calculated one or more illumination parameters, wherein the determined magnitude of motion and local acceleration of the image is employed to determine initiating the capture of data of the image. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of controlling operation of an electronic imaging device and at least one source of artificial light to capture data of at least one image of a scene, comprising:
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determining, prior to capturing data of an image, a magnitude of motion of the image, an acceleration of at least a portion of the image, and a luminance of the scene, wherein the determined acceleration includes a local acceleration of the image independent of a global acceleration of the image; calculating, from at least the magnitude of motion and the luminance of the scene, exposure parameters including at least a duration of exposure that minimizes a blue in the image due to the motion; calculating, from at least the magnitude of motion, one or more parameters of at least one light pulse to be emitted from the source of artificial light; in response to the calculated one or more parameters of the at least one light pulse, modifying at least one of the calculated exposure parameters to obtain modified exposure parameters for capturing data of the at least one image; and thereafter capturing data of the image by use of the modified exposure parameters and with artificial lighting of the scene having the calculated one or more light pulse parameters, wherein the determined magnitude of motion and local acceleration of the image is employed to determine initiating the capture of data of the image.
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34. A method of controlling operation of an electronic imaging device and at least one source of artificial light to capture data of at least one image of a scene, comprising:
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determining, prior to capturing data of an image, a magnitude of motion of the image, an acceleration of at least a portion of the scene, and a luminance of the scene, wherein the determined acceleration includes a local acceleration of the scene independent of a global acceleration of the scene; calculating, from at least the determined magnitude of image motion one or more exposure parameters including a duration and an intensity of the artificial light to illuminate the scene over the entire exposure duration; and thereafter capturing data of the image by use of the calculated one or more exposure parameters and with the artificial light illuminating the scene with the calculated intensity over the entire exposure duration wherein the determined magnitude of motion and local acceleration of the image is employed to determine initiating the capture of data of the image. - View Dependent Claims (35)
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36. An electronic imaging device, comprising:
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a photodetector; an optical system that projects an image of a scene being captured onto the photodetector; at least one source of artificial light adapted to illuminate the scene; an electronic processor that receives data of the image projected onto the photodetector and processes the scene data to provide data of an image of the scene being captured; and wherein the processor additionally quantifies, from data of the scene projected onto the photodetector, an amount of motion of the scene, and an acceleration of at least a portion of the scene, including a local acceleration of the scene, and uses this quantified motion to set a magnitude of at least one of a duration, intensity or timing of a light pulse emitted by the at least one source of artificial light while capturing data of the at least one image, and wherein the quantified motion and local acceleration of the scene is employed to determine initiating the capture of data of the at least one image. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A processor readable non-transitive storage medium that includes data that is executable by a processor to enable a plurality of actions by an imaging device to capture data of at least one image of a scene illuminated with at least one source of artificial light, comprising:
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determining a magnitude of motion of the at least one image, and an acceleration of at least a portion of the scene, prior to capturing data of the at least one image, wherein the determined acceleration includes a local acceleration of the scene; employing determined magnitude of motion to set a magnitude of at least one of a duration, an intensity, and a timing of a light pulse emitted by the at least one source of artificial light during the capturing of data of the at least image; and employing the determined magnitude of motion and local acceleration of the at least one image to determined initiating the capture of data of the at least one image.
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48. A processor readable non-transitive storage medium that includes data that is executable by a processor to enable a plurality of actions by an imaging device to capture data of at least one image of a scene illuminated with at least one source of artificial light, comprising:
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determining, prior to capturing data of an image, a magnitude of motion of the image, and acceleration of at least a portion of the image, and a luminance of the scene, wherein the determined acceleration includes a local acceleration of the image independent of a global acceleration of the image; determining, from at least the magnitude and acceleration of motion and the luminance of the scene, at least one exposure parameter that includes at least a duration of exposure that minimizes a blur in the image due to the motion; determining, from at least the magnitude of motion, at least one parameter of at least one light pulse to be emitted from the source of artificial light; in response to the determined at least one parameter of the at least one light pulse, modifying at least one of the determined exposure parameters to obtain and at least one modified exposure parameter for capturing data of the at least one image; and capturing data of the image by use of the at least one modified exposure parameter and with artificial lightning of the scene having the determined at least one light pulse parameter, wherein the determined magnitude of motion and local acceleration of the image is employed to determine initiating the capture of data of the image.
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49. An imaging device, comprising:
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a photodetector; an optical system that projects and image of a scene onto the photodetector; at least one source of artificial light adapted to illuminate the scene; a processor that enables the imaging device to perform actions, including; determining, prior to capturing data of the image, a magnitude of motion of the image, an acceleration of at least a portion of the image, and a luminance of the scene, wherein the determined acceleration includes a local acceleration of the image; determining, from at least the magnitude of motion and the luminance of the scene, exposure parameters including at least a duration of exposure that minimizes a blur in the image due to the motion; determining, from at least the magnitude of motion, at least one parameter of at least one light pulse to be emitted by the at least source of artificial light; in response to the determined at least one parameter of the at least one light pulse, modifying at least one of the determined exposure parameters to obtain modified exposure parameters for capturing data of the at least one image; and thereafter capturing data of the image by use of the modified exposure parameters and with artificial lighting of the scene having the determined the at least one light pulse parameters, wherein the determined magnitude of motion and local acceleration of the image is employed to determined initiating the capture of data of the image.
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50. An electronic chip that is operable to execute instructions for enabling a plurality of actions by an imaging device to capture data of at least one image of a scene illuminated with at least one source of artificial light, comprising:
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determining, prior to capturing data of an image, a magnitude of motion of the image, an acceleration of at least a portion of the scene, and a luminance of the scene, wherein the determined acceleration includes a local acceleration of the scene independent of a global acceleration of the scene; determining, from at least the magnitude of motion and the luminance of the scene, at least one exposure parameter that includes at least a duration of exposure that minimizes a blur in the image due to the motion; determining, from at least the magnitude of motion, at least one parameter of at least one light pulse to be emitted from the source of artificial light; in response to the determined at least at least one parameter of the at least one light pulse, modifying at least one of the determined exposure parameters to obtain at least one modified exposure parameter for capturing data of the at least one image; and capturing data of the image by use of the at least one modified exposure parameter and with artificial lightning of the scene having the determined at least one light pulse parameter, wherein the determined magnitude of motion and local acceleration of the image is employed to determine initiating the capture of data of the image.
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51. An electronic chip that is operable to execute instructions for enabling a plurality of actions by an imaging device to capture data of at least one image of a scene illuminated with at least one source of artificial light, comprising:
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determining a magnitude of motion of the at least one image and an acceleration of at least a portion of the at least one image, prior to capturing data of the at least one image, wherein the determined acceleration includes a local acceleration of the at least one image; employing determined magnitude of motion to set a magnitude of at least one of a duration, an intensity, and a timing of a light pulse emitted by the at least one source of artificial light during the capturing of data of the at least one image; and employing the determined magnitude of motion and local acceleration of the at least one image to determine initiating the capture of data of the at least one image.
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Specification