Dynamic focus for computational imaging
A method for all-in-focus image reconstruction and depth map generation in an imaging device is provided that includes capturing a multi-focus image by the imaging device, partitioning the multi-focus image into a plurality of blocks, determining, for each block of the plurality of blocks, a best inverse multi-focus point spread function (PSF) for reconstructing original image intensity values in the block, wherein the best inverse multi-focus PSF is selected from a plurality of predetermined inverse multi-focus PSFs stored in a memory of the imaging device, and applying to each block of the plurality of blocks the best inverse multi-focus PSF determined for the block to reconstruct the all-in-focus image.
1. A method for all-in-focus image reconstruction and depth map generation in an imaging device, the method comprising:
capturing a multi-focus image by the imaging device;
partitioning the multi-focus image into a plurality of blocks;
determining, for each block of the plurality of blocks, a best inverse multi-focus point spread function (PSF) for reconstructing original image intensity values in the block, wherein the best inverse multi-focus PSF is selected from a plurality of predetermined inverse multi-focus PSFs stored in a memory of the imaging device; and
applying to each block of the plurality of blocks the best inverse multi-focus PSF determined for the block to reconstruct the all-in-focus image.
2. The method of claim 1 , further comprising generating a depth map for the all-in-focus image, wherein a depth for a block of the all-in-focus image corresponding to a block of the multi-focus image is a depth corresponding to the best inverse multi-focus PSF determined for the block of the multi-focus image.
3. The method of claim 1 , wherein the predetermined inverse multi-focus PSFs are determined offline.
4. An imaging device comprising:
means for capturing a multi-focus image;
means for partitioning the multi-focus image into a plurality of blocks;
means for determining, for each block of the plurality of blocks, a best inverse multi-focus point spread function (PSF) for reconstructing original image intensity values in the block, wherein the best inverse multi-focus PSF is selected from a plurality of predetermined inverse multi-focus PSFs stored in a memory of the imaging device; and
means for applying to each block of the plurality of blocks the best inverse multi-focus PSF determined for the block to reconstruct the all-in-focus image.
5. The imaging device of claim 4 , further comprising means for generating a depth map for the all-in-focus image, wherein a depth for a block of the all-in-focus image corresponding to a block of the multi-focus image is a depth corresponding to the best inverse multi-focus PSF determined for the block of the multi-focus image.
6. The imaging device of claim 4 , wherein the predetermined inverse multi-focus PSFs are determined offline.
7. A non-transitory computer readable medium storing instructions that, when executed by at least one processor in an imaging device, cause the execution of a method for all-in-focus image reconstruction and depth map generation in the imaging device, the method comprising:
capturing a multi-focus image by the imaging device;
partitioning the multi-focus image into a plurality of blocks;
determining, for each block of the plurality of blocks, a best inverse multi-focus point spread function (PSF) for reconstructing original image intensity values in the block, wherein the best inverse multi-focus PSF is selected from a plurality of predetermined inverse multi-focus PSFs stored in a memory of the imaging device; and
applying to each block of the plurality of blocks the best inverse multi-focus PSF determined for the block to reconstruct the all-in-focus image.
8. The non-transitory computer readable medium of claim 7 , the method further comprising generating a depth map for the all-in-focus image, wherein a depth for a block of the all-in-focus image corresponding to a block of the multi-focus image is a depth corresponding to the best inverse multi-focus PSF determined for the block of the multi-focus image.
9. The non-transitory computer readable medium of claim 7 , wherein the predetermined inverse multi-focus PSFs are determined offline.