Method for obtaining at least one sub-aperture image being associated with one view
In one embodiment, it is proposed a method for obtaining at least one sub-aperture image being associated with one view, from raw light field data corresponding to recorded data by an array of pixels sensors positioned behind an array of micro-lenses in a light field camera, each of said pixel sensor recording a linear mixing of up to four different views. The method is remarkable in that it comprises applying a signal separation process on said raw data by using an inverse of a mixing matrix A, said mixing matrix comprising coefficients that convey weighting information of said up to four different views recorded by a pixel sensor.
1. A method comprising: recording raw light field data by an array of pixel sensors positioned behind an array of micro-lenses in a light field camera, wherein each pixel sensor records a linear mixing of up to four different views
obtaining at least one sub-aperture image associated with one view by applying a signal separation process on the raw data by using an inverse of a mixing matrix A, wherein the mixing matrix A comprises coefficients that convey weighting information of the up to four different views, and wherein the mixing matrix A is representative of a relationship between the data recorded by the array of pixel sensors and the at least one sub-aperture image.
2. The method according to claim 1 , wherein the coefficients are defined according to positions, in the array of pixels, of micro-lenses images centers.
3. The method according to claim 1 , wherein the applying comprises multiplying the recorded data, represented by a column vector, by the inverse of the mixing matrix A.
4. The method according to claim 1 , wherein the signal separation is a blind signal separation.
5. The method according to claim 1 , wherein the coefficients are obtained by performing a calibration process on the light field camera.
6. A non-transient storage medium storing a computer program comprising a set of computer-executable instructions to implement the method according to claim 1 wherein the instructions are executed by a computer.
7. An electronic device comprising a memory and at least one processor coupled to the memory, wherein the at least one processor is configured to: record raw light field data by an array of pixels sensors positioned behind an array of micro-lenses in a light field camera, wherein each pixel sensor records a linear mixing of up to four different views;
obtain at least one sub-aperture image associated with one view by applying a signal separation process on the raw data by using an inverse of a mixing matrix A, wherein the mixing matrix A comprises coefficients that convey weighting information of the up to four different views, and wherein the mixing matrix A is representative of a relationship between the data recorded by the array of pixel sensors and the at least one sub-aperture image.
8. The electronic device according to claim 7 , wherein the coefficients are defined according to positions, in the array of pixels, of micro-lenses images centers.
9. The electronic device according to claim 7 , wherein the at least one processor is further configured to multiply the recorded data, represented by a column vector, by the inverse of the mixing matrix A.
10. The electronic device according to claim 7 , wherein the signal separation is a blind signal separation.
11. The electronic device according to claim 7 , wherein the at least one processor is further configured to perform a calibration of the light field camera in order to obtain the coefficients.
12. The electronic device according to claim 7 , wherein the coefficients that convey weighting information detail proportion of the up to four different views recorded by the first pixel sensor.
13. The method according to claim 1 , wherein the coefficients that convey weighting information detail proportion of the up to four different views recorded by the first pixel sensor.
14. A method comprising:
recording, by an array of pixel sensors, raw light field data representative of an image through an array of micro-lenses, wherein each pixel sensor of the array of pixel sensors records data comprising a linear mixing of up to four different views of the image;
obtaining at least one sub-aperture image associated with one view of the image by applying a signal separation process on the raw data by using an inverse of a mixing matrix A, wherein the mixing matrix A comprises coefficients that convey weighting information of the up to four different views, and wherein the mixing matrix A is representative of a relationship between the data recorded by the array of pixel sensors and the at least one sub-aperture image.
15. The method according to claim 14 , wherein the coefficients that convey weighting information detail proportion of the up to four different views.