1
Radka Tezaur: Automatic illuminant estimation and white balance adjustment based on color gamut unions. Nikon Corporation, Roeder & Broder, October 14, 2014: US08860838 (1 worldwide citation)

A system for estimating an illuminant of a scene that was captured by an input image includes a control system that generates an input gamut that includes the input colors for the input image. Further, the control system compares the input gamut to an illuminant database that includes separate infor ...


2
Radka Tezaur, Gazi Ali, Tetsuji Kamata: Algorithm and device for image processing. Nikon Corporation, Roeder & Broder, Steven G Roeder, October 3, 2017: US09779491 (1 worldwide citation)

Deblurring a blurry image (14) includes the steps of (i) computing a spatial mask (256); (ii) computing a modified blurry image (264) using the blurry image (14) and the spatial mask (256); and (iii) computing a latent sharp image (16) using the modified blurry image (264) and a point spread functio ...


3
Radka Tezaur: Algorithm for minimizing latent sharp image cost function and point spread function cost function with a spatial mask in a regularization term. Nikon Corporation, Roeder & Broder, Steven G Roeder, February 16, 2016: US09262815 (1 worldwide citation)

A method for deblurring a blurry image (18) includes utilizing a spatial mask and a variable splitting technique in the latent sharp image estimation cost function. Additionally or alternatively, the method can include the utilizing a spatial mask and a variable splitting technique in the PSF estima ...


4
Radka Tezaur: Method for deblurring an image that produces less ringing. Nikon Corporation, Roeder & Broder, April 1, 2014: US08687909 (1 worldwide citation)

A method for reducing blurring in a blurred image (14) of a scene (12) includes the steps of: (i) creating an edge mask (362) from the blurred image (14); (ii) extending the edge mask (362; (iii) forming an initial array (e.g. extending the blurred image (360); and (iv) performing Lucy-Richardson it ...


5
Radka Tezaur: Algorithm for minimizing latent sharp image cost function and point spread function with a spatial mask in a fidelity term. NIKON CORPORATION, Roeder & Broder, Steven G Roeder, January 26, 2016: US09245328 (1 worldwide citation)

A method for deblurring a blurry image (18) includes utilizing a spatial mask and a variable splitting technique in the latent sharp image estimation cost function. Additionally or alternatively, the method can include the utilizing a spatial mask and a variable splitting technique in the PSF estima ...


6
Radka Tezaur: Tone mapping with adaptive slope for image sharpening. Nikon Corporation, Roeder & Broder, November 12, 2013: US08582914 (1 worldwide citation)

A method for sharpening a captured image (14) includes (i) selecting a pixel (240) in the captured image (14); (ii) selecting a selected high intensity value (302); (iii) selecting a selected low intensity value (302); (iv) normalizing the intensity value to establish a normalized intensity value us ...


7
Radka Tezaur: Point spread function estimation of optics blur. NIKON CORPORATION, Roeder & Broder, Steven G Roeder, December 25, 2018: US10165263

A method for estimating an optics point spread function (518) of a lens assembly (20) includes (i) providing a test chart (14); (ii) providing a capturing system (22); (iii) capturing a test chart image (316) of the test chart (14) with the capturing system (22) using the lens assembly (20) to focus ...


8
Gazi Ali, Li Hong, Radka Tezaur, Mark Takita: Globally dominant point spread function estimation. Nikon Corporation, Roeder & Broder, Steven G Roeder, March 7, 2017: US09589328

A group point spread function (238) for a blurry image (18) can be determined by dividing the blurry image (18) into a plurality of image regions (232), estimating a region point spread function (234) for at least two of the image regions (232); and utilizing at least two of the region point spread ...


9
Radka Tezaur: Adaptive overshoot control for image sharpening. Nikon Corporation, Roeder & Broder, April 1, 2014: US08687912

A method for sharpening a captured image includes the steps of (i) identifying a plurality of edge pixels in the captured image, (ii) reviewing the plurality of edge pixels to identify one or more line pixels, and one or more non-line pixels in the captured image (354), and (iii) sharpening the capt ...


10
Gazi Ali, Li Hong, Radka Tezaur, Mark Takita: Point spread function classification using structural properties. NIKON CORPORATION, Roeder & Broder, Steven G Roeder, December 27, 2016: US09530079

A method for classifying a test image (16) includes the steps of building a classifier (300), and classifying the test image (16) with the classifier (300). After the test image (16) is classified, the test image (16) can be subsequently processed (e.g. deblurred) with improved accuracy. The classif ...