Image enhancement for challenging lighting conditions
First Claim
Patent Images
1. A method of enhancing a digital image comprising:
- receiving a digital image;
determining a lighting impairment type of the digital image;
processing the received digital image based on the determined lighting impairment to produce a pre-processed image that appears as a particular impairment type of an enhancement algorithm; and
applying the enhancement algorithm for the particular impairment type to produce a processed image, the enhancement algorithm applied to;
the pre-processed image when the lighting impairment type of the digital image does not match the particular impairment type of the enhancement algorithm;
orthe digital image when the lighting impairment type of the digital image matches the particular impairment type.
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Abstract
An image and video enhancement technique is described that allows a core enhancement algorithm to be applied to images captured in various challenging lighting conditions. The technique detects a lighting impairment and inverts the image if it is a low-light impairment. The inverted low-light image is similar to haze impairment images, allowing both haze images and low-light images to be enhanced using the same enhancement algorithm.
19 Citations
21 Claims
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1. A method of enhancing a digital image comprising:
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receiving a digital image; determining a lighting impairment type of the digital image; processing the received digital image based on the determined lighting impairment to produce a pre-processed image that appears as a particular impairment type of an enhancement algorithm; and applying the enhancement algorithm for the particular impairment type to produce a processed image, the enhancement algorithm applied to; the pre-processed image when the lighting impairment type of the digital image does not match the particular impairment type of the enhancement algorithm;
orthe digital image when the lighting impairment type of the digital image matches the particular impairment type. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for enhancing a digital image comprising:
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an impairment detection component to determine a lighting impairment type of images; an enhancement component to apply an enhancement algorithm to images of a particular lighting impairment type; a pre-processing component to process images based on the determined lighting impairment to produce pre-processed images that appear as the particular impairment type of the enhancement algorithm; and an enhancement control component to receive a digital image, determine an impairment type of the digital image using the impairment detection component, and apply the enhancement algorithm of the image enhancement component to produce a processed image, the enhancement algorithm applied to; a pre-processed image, produced by processing the received digital image processed by the pre-processing component, when the lighting impairment type of the digital image does not match the particular lighting impairment type of the enhancement;
orthe digital image when the lighting impairment type matches the particular impairment type of the enhancement. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A non-transitory computer readable medium comprising instructions for:
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receiving a digital image; determining a lighting impairment type of the digital image; processing the received digital image based on the determined lighting impairment to produce a pre-processed image that appears as a particular impairment type of an enhancement algorithm; and applying the enhancement algorithm for the particular impairment type to produce a processed image, the enhancement algorithm applied to; the pre-processed image when the lighting impairment type of the digital image does not match the particular impairment type of the enhancement algorithm;
orthe digital image when the lighting impairment type of the digital image matches the particular impairment type.
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Specification