Gaze direction-based adaptive pre-filtering of video data
A multi-layer low-pass filter is used to filter a first frame of video data representing at least a portion of an environment of an individual. A first layer of the filter has a first filtering resolution setting for a first subset of the first frame, while a second layer of the filter has a second filtering resolution setting for a second subset. The first subset includes a data element positioned along a direction of a gaze of the individual, and the second subset of the frame surrounds the first subset. A result of the filtering is compressed and transmitted via a network to a video processing engine configured to generate a modified visual representation of the environment.
1. A method, comprising:
filtering one or more video frames using a first set of values of parameters of a multi-layer low-pass filter of a device, wherein the multi-layer low-pass filter comprises a first layer and a second layer with respective filtering resolutions, the filtering comprising:
for individual ones of the one or more video frames, applying the first layer to a first pixel subset of the video frame, and applying the second layer to a second pixel subset of the video frame;
determining one or more properties of content of the one or more video frames; and
modifying, based at least in part on the one or more properties, a value of at least one parameter of the multi-layer low-pass filter.
2. The method as recited in claim 1 , wherein the one or more properties of the content comprises a contrast property.
3. The method as recited in claim 1 , wherein the modifying comprises changing a size of a subset of a video frame to be filtered using the first layer of the multi-layer low-pass filter.
4. The method as recited in claim 1 , wherein the device comprises a wearable device.
5. The method as recited in claim 1 , wherein the device comprises a mixed reality system device.
6. The method as recited in claim 1 , wherein a perimeter of a portion of a video frame filtered using the first layer comprises one of: (a) a circle, (b) an oval, or (c) a polygon.
7. The method as recited in claim 1 , further comprising:
displaying a modified visual representation of an environment represented in the one or more video frames, wherein the modified visual representation is obtained using a video processing engine to which a result of the filtering is provided as input.
8. A system, comprising:
one or more processors; and
one or more memories;
wherein the one or more memories store program instructions that when executed on or across the one or more processors perform a method comprising:
filtering one or more video frames using a first set of values of parameters of a multi-layer low-pass filter, wherein the multi-layer low-pass filter comprises a first layer and a second layer with respective filtering resolutions, the filtering comprising:
for individual ones of the one or more video frames, applying the first layer to a first pixel subset of the video frame, and applying the second layer to a second pixel subset of the video frame;
determining one or more properties of content of the one or more video frames; and
modifying, based at least in part on the one or more properties, a value of at least one parameter of the multi-layer low-pass filter.
9. The system as recited in claim 8 , wherein the one or more properties of the content comprises a contrast property.
10. The system as recited in claim 8 , wherein the modifying comprises changing a size of a subset of a video frame to be filtered using the first layer of the multi-layer low-pass filter.
11. The system as recited in claim 8 , wherein the method further comprises:
modifying values of one or more parameters of the multi-layer low-pass filter based at least in part on feedback obtained from a user of a device at which the filtering is performed.
12. The system as recited in claim 8 , wherein a perimeter of a portion of a video frame filtered using the first layer comprises one of: (a) a circle, (b) an oval, or (c) a polygon.
13. The system as recited in claim 8 , wherein the method further comprises:
compressing a result of the filtering of the one or more video frames; and
transmitting a result of the compressing to a video processing engine configured to generate a modified visual representation of an environment represented in the one or more video frames.
14. The system as recited in claim 8 , wherein the method further comprises:
combining, using a blending function, a first filtering output produced by the first layer and a second filtering output produced by the second layer; and
transmitting a result of the combining to a video processing engine configured to generate a modified visual representation of an environment represented in the one or more video frames.
15. One or more non-transitory computer-accessible storage media storing program instructions that when executed on or across one or more processors cause the one or more processors to perform a method comprising:
filtering one or more video frames using a first set of values of parameters of a multi-layer low-pass filter, wherein the multi-layer low-pass filter comprises a first layer and a second layer with respective filtering resolutions, the filtering comprising:
for individual ones of the one or more video frames, applying the first layer to a first pixel subset of the video frame, and applying the second layer to a second pixel subset of the video frame;
determining one or more properties of content of the one or more video frames; and
modifying, based at least in part on the one or more properties, a value of at least one parameter of the multi-layer low-pass filter.
16. The one or more non-transitory computer-accessible storage media as recited in claim 15 , wherein the one or more properties of the content comprises a contrast property.
17. The one or more non-transitory computer-accessible storage media as recited in claim 15 , wherein the modifying comprises changing a size of a subset of a video frame to be filtered using the first layer of the multi-layer low-pass filter.
18. The one or more non-transitory computer-accessible storage media as recited in claim 15 , wherein the method further comprises:
modifying values of one or more parameters of the multi-layer low-pass filter based at least in part on feedback obtained from a user of a device at which the filtering is performed.
19. The one or more non-transitory computer-accessible storage media as recited in claim 15 , wherein a perimeter of a first portion of a video frame filtered using the first layer has a first shape, and wherein a parameter of a second portion of the video frame filtered using the second layer has a shape which differs from the first shape.
20. The one or more non-transitory computer-accessible storage media as recited in claim 15 , wherein the method further comprises:
combining, using a blending function, a first filtering output produced by the first layer and a second filtering output produced by the second layer; and
transmitting a result of the combining to a video processing engine configured to generate a modified visual representation of an environment represented in the one or more video frames.