Apple Inc.

Claus Moelgaard

Todd Stephen Sachs

Paul M Hubel

Garrett M Johnson

Farhan A Baqai

Alexis Gatt

Rudolph Van Der Merwe

Graham D Finlayson

Nicolas P Bonnier

Noah Denis Bedard

Jason Klivington

Alex Tremain Nelson

Ilya Romanenko

Charles A Mezak

Douglas P Mitchell

Wu Cheng

Gijesh Varghese

Bosheng Zhang

Arwen V Bradley

Zahra Sadeghipoor Kermani

Jason P De Villiers

Sebastien Marineau-Mes

Fabio Ricardi

Alexandra S Ludlow

Tobias Baldauf

Hau Ling Hung

Embodiments disclosed herein are directed to devices and methods for performing spatially-varying brightness correction of a flash image. The spatially-varying brightness correction utilizes a set of images that includes one or more images captured under flash illumination and one or more images captured without flash illumination, which are used to decompose one of the flash images or an image generated therefrom into a flash contribution image and an ambient contribution image. The flash contribution image and the ambient contribution image are recombined to generate a corrected flash image, and information about the flash module and/or scene is used to adjust the relative contributions of these images during recombination.

Techniques for correcting images in flash photography

In one embodiment, a method includes obtaining an image comprising a plurality of pixels, determining, for a particular pixel of the plurality of pixels, a gradient value, classifying, based on the gradient value, the particular pixel into a flat class or one of a plurality of edge classes, and denoising the particular pixel based on the classification.

Gradient-based noise reduction

In one embodiment, a method includes: obtaining a first image of a scene while an illumination component is set to an inactive state; obtaining a second image of the scene while the illumination component is set to a pre-flash state; determining one or more illumination control parameters for the illumination component for a third image of the scene that satisfy a foreground-background balance criterion based on a function of the first and second images in order to discriminate foreground data from background data within the scene; and obtaining the third image of the scene while the illumination component is set to an active state in accordance with the one or more illumination control parameters.

Method and device for balancing foreground-background luminosity

In various implementations a method includes obtaining a plurality of source images, stabilizing the plurality of source images to generate a plurality of stabilized images, and averaging the plurality of stabilized image to generate a synthetic long exposure image. In various implementations, stabilizing the plurality of source images includes: selecting one of the plurality of source images to serve as a reference frame; and registering others of the plurality of source images to the reference frame by applying a perspective transformation to others of the plurality of the source images.

Synthetic long exposure image with optional enhancement using a guide image

Growing community of inventors

Los Gatos, CA, United States of America

Claus Moelgaard