Defogging system and defogging method
AssigneeHanwha Techwin Co., Ltd.
InventorsSeong Ha Jeon, Young Je Jung
Life of this patent
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Abstract
Provided are a defogging system and a defogging method. The defogging system includes: an illuminance sensor configured to detect a surrounding illuminance; a level determiner configured to determine a defogging level of the input image based on the detected surrounding illuminance; and a defogger configured to determine a fog state of the input image based on a histogram of the input image, and adaptively defog the input image according to the determined fog state and defogging level.
Claims18
A defogging system comprising at least one processor configured to implement:
- an illuminance sensor detecting a surrounding illuminance;
- a level determiner determining a defogging level of an input image based on the detected surrounding illuminance;
- and
- a defogger determining a fog state of the input image based on a histogram of the input image, and adaptively defog the input image according to the determined fog state and defogging level,
- wherein the defogger comprises:
- a histogram generator configured to generate the histogram of the input image;
- a fog detector configured to detect a first minimum brightness value and a first maximum brightness value from the histogram, the first minimum brightness value and the first maximum brightness value corresponding to a pre-set cumulative probability;
- and
- a scaling unit configured to scale the input image by respectively resetting the first minimum brightness value and the first maximum brightness value to a second minimum brightness value and a second maximum brightness value according to the defogging level determined based on the detected surrounding illuminance.
A defogging method using at least one processor, the method comprising:
- detecting a surrounding illuminance by an illuminance sensor;
- determining a defogging level of an input image based on the detected surrounding illuminance;
- and
- determining a fog state of the input image based on a histogram of the input image, and adaptively defogging the input image according to the determined fog state and defogging level,
- wherein the determining the fog state and the adaptively defogging comprises:
- generating the histogram of the input image;
- detecting a first minimum brightness value and a first maximum brightness value which correspond to a pre-set cumulative probability from the histogram;
- and
- scaling the input image by respectively resetting the first minimum brightness value and the first maximum brightness value to a second minimum brightness value and a second maximum brightness value according to the defogging level determined based on the detected surrounding illuminance.
Dependencies are inferred from the claim text.