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US 8,559,705 B2Granted
Interactive refocusing of electronic images
AssigneeLytro, Inc.
InventorYi-Ren Ng
Life of this patent
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Abstract
A method is performed to refocus a digital photographic image comprising a plurality of pixels. In the method, a set of images is computed corresponding to the digital photographic image and focused at different depths. Refocus depths for at least a subset of the pixels are identified and stored in a look-up table. At least a portion of the digital photographic image is refocused at a desired refocus depth determined from the look-up table.
Claims16
A method of refocusing a light field image in response to user input, the method comprising:
- receiving a light field image comprising light field data;
- digitally refocusing the light field image to generate a plurality of refocused images, each having a focus depth;
- storing the generated plurality of refocused images in a storage device;
- for each of a plurality of two-dimensional positions in the light field image:
- determining which of the plurality of refocused images is in focus at the two-dimensional position;
- and
- storing, in a look-up table, an index entry associating the two-dimensional position with the identified refocused image;
- displaying one of the refocused images, the displayed image having a first focus depth;
- receiving user input to select a two-dimensional position within the displayed image;
- and
- in response to the received input:
- retrieving, from the look-up table, an index entry identifying a stored refocused image corresponding to the selected two-dimensional position, the stored refocused image having a second focus depth different from the first focus depth;
- retrieving the identified refocused image from the storage device;
- and
- displaying the retrieved refocused image having the second focus depth.
12 more elements
Dependencies are inferred from the claim text.