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US 2019/0166292 A1Published application
Self-adaptive color based haze removal for video
AssigneeIntel Corporation
InventorDmitry Grilikhes
Life of this patent
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Abstract
Techniques related to removing haze from video are discussed. Such techniques include color converting a video frame from an input color space to a haze color space using a haze color detected in a previous frame, estimating pixel-wise haze amounts, de-hazing the video frame in the haze color space using the pixel-wise haze amounts, and color converting the de-hazed frame to the input color space.
Claims25
A system for haze removal in video comprising:
- a memory to store a video sequence;
- and
- a processor coupled to the memory, the processor to:
- determine, using a first frame of the video sequence, a haze color and a de-hazing strength factor for use in a second frame of the video sequence, wherein the first frame, the second frame, and the haze color are in a first color space;
- color convert the second frame from the first color space to a haze color space using the haze color, wherein the haze color space comprises a first haze color channel indicative of the haze color and at least a second haze color channel substantially independent of the haze color;
- perform haze amount estimations for individual pixels of the second frame based at least in part on differences, one for each of the individual pixels, between a first pixel value for the first haze color channel and a second pixel value for the second haze color channel;
- generate a de-hazed second frame in the haze color space using the haze amount estimations and the de-hazing strength factor;
- color convert the de-hazed second frame from the haze color space to the first color space;
- and
- transmit the de-hazed second frame in the first color space.
7 more elements
A computer-implemented method for haze removal in video comprising:
- determining, using a first frame of a video sequence, a haze color and a de-hazing strength factor for use in a second frame of the video sequence, wherein the first frame, the second frame, and the haze color are in a first color space;
- color converting the second frame from the first color space to a haze color space using the haze color, wherein the haze color space comprises a first haze color channel indicative of the haze color and at least a second haze color channel substantially independent of the haze color;
- performing haze amount estimations for individual pixels of the second frame based at least in part on differences, one for each of the individual pixels, between a first pixel value for the first haze color channel and a second pixel value for the second haze color channel;
- generating a de-hazed second frame in the haze color space using the haze amount estimations and the de-hazing strength factor;
- color converting the de-hazed second frame from the haze color space to the first color space;
- and
- transmitting the de-hazed second frame in the first color space.
4 more elements
At least one machine readable medium comprising a plurality of instructions that, in response to being executed on a processor, cause the device to perform haze removal in video by:
- determining, using a first frame of a video sequence, a haze color and a de-hazing strength factor for use in a second frame of the video sequence, wherein the first frame, the second frame, and the haze color are in a first color space;
- color converting the second frame from the first color space to a haze color space using the haze color, wherein the haze color space comprises a first haze color channel indicative of the haze color and at least a second haze color channel substantially independent of the haze color;
- performing haze amount estimations for individual pixels of the second frame based at least in part on differences, one for each of the individual pixels, between a first pixel value for the first haze color channel and a second pixel value for the second haze color channel;
- generating a de-hazed second frame in the haze color space using the haze amount estimations and the de-hazing strength factor;
- color converting the de-hazed second frame from the haze color space to the first color space;
- and
- transmitting the de-hazed second frame in the first color space.
4 more elements
Dependencies are inferred from the claim text.