Systems and methods for encoding image files containing depth maps stored as metadata
Systems and methods in accordance with embodiments of the invention are configured to render images using light field image files containing an image synthesized from light field image data and metadata describing the image that includes a depth map. One embodiment of the invention includes a processor and memory containing a rendering application and a light field image file including an encoded image, a set of low resolution images, and metadata describing the encoded image, where the metadata comprises a depth map that specifies depths from the reference viewpoint for pixels in the encoded image. In addition, the rendering application configures the processor to: locate the encoded image within the light field image file; decode the encoded image; locate the metadata within the light field image file; and post process the decoded image by modifying the pixels based on the depths indicated within the depth map and the set of low resolution images to create a rendered image.
1. A method for encoding an image file, comprising:
obtaining a first image of a scene;
generating a depth map for the first image of the scene;
generating a synthetic image of the scene by applying a depth-based effect to the first image of the scene using the depth map;
generating an image file comprising a plurality of segments, where:
the first image of the scene is stored in a first segment of the plurality of segments;
the depth map for the first image of the scene is stored in a second segment of the plurality of segments; and
the synthetic image of the scene is stored in a third segment of the plurality of segments; and
storing the image file in a memory.
2. The method of claim 1 , further comprising obtaining, using an array camera, a second image of the scene from a different viewpoint than the first image of the scene.
3. The method of claim 2 , wherein generating the depth map is performed using the first image of the scene and the second image of the scene.
4. The method of claim 3 , wherein generating the depth map comprises determining disparity between pixels in the first image and the second image.
5. The method of claim 1 , wherein the depth-based effect comprises applying blur to the first image.
6. The method of claim 1 , wherein the image file is encoded in accordance with the Exchangeable Image File Format (EXIF).
7. The method of claim 1 , wherein the image file is encoded in accordance with the JPEG File Interchange Format (JFIF).
8. The method of claim 1 , wherein a confidence map for the depth map is stored in a fourth segment of the plurality of segments.
9. The method of claim 1 , wherein an edge map for the first image is stored in a fourth segment of the plurality of segments.
10. The method of claim 1 , wherein a lower resolution image of the scene is stored in a fourth segment of the plurality of segments.
11. An image encoding device, comprising:
a processor; and
a memory, the memory comprising an application that configures the processor to:
obtain a first image of a scene;
generate a depth map for the first image of the scene;
generate a synthetic image of the scene by applying a depth-based effect to the first image of the scene using the depth map;
generate an image file comprising a plurality of segments, where:
the first image of the scene is stored in a first segment of the plurality of segments;
the depth map for the first image of the scene is stored in a second segment of the plurality of segments; and
the synthetic image of the scene is stored in a third segment of the plurality of segments; and
store the image file in the memory.
12. The device of claim 11 , wherein the image encoding device further comprises an array camera, and the application further configures the processor to capture the first image of the scene and a second image of the scene, where the second image of the scene is captured from a different viewpoint than the first image of the scene.
13. The device of claim 12 , wherein the application further configures the processor to generate the depth map using the first image of the scene and the second image of the scene.
14. The device of claim 13 , wherein to generate the depth map, the application further configures the processor to determine disparity between pixels in the first image and the second image.
15. The device of claim 11 , wherein the depth-based effect comprises a blur effect.
16. The device of claim 11 , wherein the image file is encoded in accordance with the Exchangeable Image File Format (EXIF).
17. The device of claim 11 , wherein the image file is encoded in accordance with the JPEG File Interchange Format (JFIF).
18. The device of claim 11 , wherein a confidence map for the depth map is stored in a fourth segment of the plurality of segments.
19. The device of claim 11 , wherein an edge map for the first image is stored in a fourth segment of the plurality of segments.
20. The device of claim 11 , wherein a lower resolution image of the scene is stored in a fourth segment of the plurality of segments.