System and methods for calibration of an array camera

1. A method for calibrating an array camera including a plurality of imaging components where the plurality of imaging components include a reference imaging component and a plurality of associate imaging components associated with the reference imaging component, the method comprising:

receiving an image of a test pattern using each of the plurality of imaging components of the array camera;

generating a corrected image of the test pattern for the reference imaging component based on scene independent geometric corrections for the image data captured by the reference imaging component;

generating scene independent geometric corrections for the image data captured by each of the associate imaging components associated with the reference imaging component using the image of the test pattern captured by each associate imaging component and the corrected image of the reference imaging component using a processor; and

calibrating at least one associate imaging component of the array camera based on the generated scene independent geometric corrections.

2. The method of claim 1 wherein the test pattern includes a low-contrast slanted edge pattern.

3. The method of claim 2 wherein the test pattern includes a plurality of Macbeth Color Chart type patterns inset at different positions in the low-contrast slanted pattern.

4. The method of claim 1 wherein the test pattern is at a distance of at least 70 percent of the hyperfocal distance of the array camera away from the array camera during the capturing of the image of the test pattern.

5. The method of claim 1 wherein the test pattern is at a distance of at 50 percent of the hyperfocal distance of the array camera away from the array camera during the capturing of the image of the test pattern.

6. The method of claim 1 further comprising performing at least one pass/fail test of the array camera based on images of the test pattern captured by the plurality of imaging components in the array camera.

7. The method of claim 1 wherein the scene independent geometric corrections for the image data captured by the reference imaging component is generated using data of the image of the test pattern captured by the reference imaging component and data describing the test pattern, wherein the method further comprises:

identifying intersection points in the image of the test pattern captured by the reference imaging component;

determining the uniformity characteristics of the reference imaging component from the identified intersection points in the image of the test pattern captured by the reference imaging component and the test pattern; and

deriving a set of geometric corrections for the reference imaging component to compensate for low frequency aberrations in the captured image of the test pattern.

8. The method of claim 1 wherein generating scene independent geometric corrections for the image data captured by each of the associate imaging components associated with the reference imaging component comprises:

identifying intersection points in the test pattern image captured by each of the associate imaging components;

translating the intersection points from the captured test pattern images captured by each of the associate plurality of imaging components associated with the reference imaging component in accordance with an expected parallax shift for each of the plurality of associate imaging components relative to the reference imaging component; and

deriving a set of geometric corrections for each of the plurality of associate imaging components associated with the reference imaging component to compensate for low frequency aberrations in the captured image of the test pattern by comparing the translated intersection points in the images captured by each of the plurality of associate imaging components to corresponding intersection points in the corrected image for the reference imaging component.

9. The method of claim 8 , wherein the expected parallax shift for each of the plurality of associate imaging components is based upon at least one of the physical offset of a particular imaging component to the reference imaging component, the behavior of sensor optics in the particular associate imaging component, and distance of the test pattern from the array camera.

10. The method of claim 1 further comprising storing the images captured by the plurality of imaging components to perform the calibration of the reference imaging component and each of the plurality of associate imaging components at a later time.

11. The method of claim 1 further comprising storing the scene dependent geometric correction information for the image data captured by the reference imaging component in a memory.

12. The method of claim 1 further comprising storing the scene dependent geometric correction information for the image data captured by each of the plurality of associated imaging components associated with the reference imaging component in a memory.

13. The method of claim 1 , further comprising generating colorimetric corrections for the image data captured by each imaging component in the array camera using data of the image of the test pattern captured by the imaging component using the processor.

14. The method of claim 1 , further comprising generating photometric corrections for the image data captured by each imaging component in the array camera using data of the image of the test pattern captured by the reference imaging component using the processor.

15. A device for calibrating an array camera including a plurality of imaging components where the plurality of imaging components include a reference imaging component and a plurality of associate imaging components associated with the reference imaging component comprising:

a memory; and

a processor configured via one or more applications stored in the memory to:

receive an image of a test pattern using each of the plurality of imaging components of the array camera;

generate a corrected image of the test pattern for the reference imaging component based on scene independent geometric corrections for the image data captured by the reference imaging component;

generate scene independent geometric corrections for the image data captured by each of the associate imaging components associated with the reference imaging component using the image of the test pattern captured by each associate imaging component and the corrected image of the reference imaging component using the processor; and

calibrate at least one associate imaging component of the array camera based on the generated scene independent geometric corrections.

16. A non-transitory machine readable device containing processor instructions, where execution of the instructions by a processor causes the processor to perform a process for calibrating an array camera including a plurality of imaging components where the plurality of imaging components include a reference imaging component and a plurality of associate imaging components associated with the reference imaging component, the process comprising:

receiving an image of a test pattern using each of the plurality of imaging components of the array camera;

generating a corrected image of the test pattern for the reference imaging component based on scene independent geometric corrections for the image data captured by the reference imaging component;

generating scene independent geometric corrections for the image data captured by each of the associate imaging components associated with the reference imaging component using the image of the test pattern captured by each associate imaging component and the corrected image of the reference imaging component using the processor; and

calibrating at least one associate imaging component of the array camera based on the generated scene independent geometric corrections.