Compensating for sensor saturation and microlens modulation during light-field image processing
AssigneeLytro, Inc.
InventorsKurt Barton Akeley, Brian Cabral, Colvin Pitts, Chia-Kai Liang, Bennett Wilburn, Timothy James Knight, Yi-Ren Ng
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Abstract
According to various embodiments, the system and method of the present invention process light-field image data so as to reduce color artifacts, reduce projection artifacts, and/or increase dynamic range. These techniques operate, for example, on image data affected by sensor saturation and/or microlens modulation. Flat-field images are captured and converted to modulation images, and then applied on a per-pixel basis, according to techniques described herein.
Claims36
In a light-field image capture device having a plurality of microlenses, a method for compensating for sensor saturation and microlens modulation, comprising:
- in a processor, determining a flat-field response contour for each of at least one region of an image sensor;
- in the processor, generating a modulation image based on the at least one flat-field response contour;
- in the processor, generating a demodulation image from the modulation image;
- in the processor, receiving light-field image data;
- in the processor, applying the generated demodulation image to the received light-field image data to generate a demodulated light-field image;
- and
- outputting the light-field demodulated image on a display device.
A computer program product for compensating for sensor saturation and microlens modulation in a light-field image capture device having a plurality of microlenses, comprising:
- a non-transitory computer-readable storage medium;
- and
- computer program code, encoded on the medium, configured to cause at least one processor to perform the steps of:
- determining a flat-field response contour for each of at least one region of an image sensor;
- generating a modulation image based on the at least one flat-field response contour;
- generating a demodulation image from the modulation image;
- receiving light-field image data;
- applying the generated demodulation image to the received light-field image data to generate a demodulated light-field image;
- and
- causing a display device to output the light-field demodulated image.
A system for compensating for sensor saturation and microlens modulation in a light-field image capture device having a plurality of microlenses, comprising:
- circuitry configured to perform the steps of:
- determining a flat-field response contour for each of at least one region of an image sensor;
- generating a modulation image based on the at least one flat-field response contour;
- generating a demodulation image from the modulation image;
- receiving light-field image data;
- and
- applying the generated demodulation image to the received light-field image data to generate a demodulated light-field image;
- and
- a display device, communicatively coupled to the circuitry, configured to output the light-field demodulated image.
Dependencies are inferred from the claim text.