Adaptive PSF estimation technique using a sharp preview and a blurred image
First Claim
Patent Images
1. A method of adaptive motion estimation and deblurring of acquired digital images, comprising:
- acquiring multiple digital images with a moving digital image acquisition device, including a relatively sharp, underexposed reference image and a blurred image;
estimating an approximate point spread function (PSF) based on a first DC offset point corresponding to the moving of the device during the acquiring of the multiple digital images;
generating a second DC offset point and calculating a second PSF based on the second DC offset point;
choosing multiple crops from the blurred image and the reference image or an interpolated version of the reference image, or both, and equalizing a brightness between these crops;
computing said second PSF for a pair of horizontal and vertical offsets;
deblurring at least one of the digital images using a crop of the blurred image or convoluting with a crop of a relatively underexposed reference image, or a combination thereof.
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Abstract
An adaptive motion estimation and deblurring technique for acquired digital images includes acquiring multiple digital images with a moving digital image acquisition device that includes an image sensor, including a relatively sharp, underexposed reference image and a blurred image. Anb initial approximate point spread function (PSF) is estimated corresponding to the moving of the device. A different DC offset point is determined and a second PSF is calculated based on the different DC offset point.
25 Citations
18 Claims
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1. A method of adaptive motion estimation and deblurring of acquired digital images, comprising:
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acquiring multiple digital images with a moving digital image acquisition device, including a relatively sharp, underexposed reference image and a blurred image; estimating an approximate point spread function (PSF) based on a first DC offset point corresponding to the moving of the device during the acquiring of the multiple digital images; generating a second DC offset point and calculating a second PSF based on the second DC offset point; choosing multiple crops from the blurred image and the reference image or an interpolated version of the reference image, or both, and equalizing a brightness between these crops; computing said second PSF for a pair of horizontal and vertical offsets; deblurring at least one of the digital images using a crop of the blurred image or convoluting with a crop of a relatively underexposed reference image, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. One or more non-transitory computer readable media having code embedded therein for programming one or more processors to perform a method of adaptive motion estimation and deblurring of acquired digital images, wherein the method comprises:
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acquiring multiple digital images with a moving digital image acquisition device, including a relatively sharp, underexposed reference image and a blurred image; estimating an approximate point spread function (PSF) based on a first DC offset point corresponding to the moving of the device during the acquiring of the multiple digital images; generating a second DC offset point and calculating a second PSF based on the second DC offset point; choosing multiple crops from the blurred image and the reference image or an interpolated version of the reference image, or both, and equalizing a brightness between these crops; computing said second PSF for a pair of horizontal and vertical offsets; deblurring at least one of the digital images using a crop of the blurred image or convoluting with a crop of a relatively underexposed reference image, or a combination thereof. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A digital image acquisition device, comprising:
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a lens and an image sensor for acquiring a digital image; a processor; and one or more processor-readable media having code embedded therein for programming the processor to perform a method of adaptive motion estimation and deblurring of acquired digital images, wherein the method comprises; acquiring multiple digital images with a moving digital image acquisition device, including a relatively sharp, underexposed reference image and a blurred image; estimating an approximate point spread function (PSF) based on a first DC offset point corresponding to the moving of the device during the acquiring of the multiple digital images; generating a second DC offset point and calculating a second PSF based on the second DC offset point; choosing multiple crops from the blurred image and the reference image or an interpolated version of the reference image, or both, and equalizing a brightness between these crops; computing said second PSF for a pair of horizontal and vertical offsets; deblurring at least one of the digital images using a crop of the blurred image or convoluting with a crop of a relatively underexposed reference image, or a combination thereof. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification