Systems and methods for reducing rain effects in images
AssigneeThe Trustees of Columbia University in the City of New York
InventorsKshitiz Garg, Shree K. Nayar
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Abstract
Systems and methods for reducing the visibility of rain in acquired images are provided. One or more inputs relating the scene desired to be acquired by the user are used to retrieve camera settings that will reduce the visibility of rain in acquired images. Additionally, features relating to the scene may be automatically determined and used alone, or in combination with user inputs, to retrieve camera settings. The acquired images may be part of a video. Another feature of the invention is its use as a rain gauge. The camera settings are adjusted to enhance the visibility of rain, then one or more images are acquired and analyzed for the amount and size of raindrops. From this analysis the rain rate can be determined.
Claims25
A method for reducing the visibility of rain in images, the method comprising:
- acquiring a first image with an image acquisition device having one or more settings;
- detecting rain in the acquired first image;
- adjusting the one or more settings of the image acquisition device to reduce the visibility of rain, wherein the one or more settings comprise at least one of:
- focal length, F-number, and exposure time;
- and
- acquiring a second image with the image acquisition device using the adjusted settings.
A non-transitory computer-readable medium containing computer-executable instructions that, when executed by a processor, cause the processor to perform a method for reducing the visibility of rain in images, the method comprising:
- acquiring a first image with an image acquisition device having one or more settings;
- detecting rain in the acquired first image;
- adjusting the one or more settings of the image acquisition device to reduce the visibility of rain, wherein the one or more settings comprise at least one of:
- focal length, F-number, and exposure time;
- and
- acquiring a second image with the image acquisition device using the adjusted settings.
A system for reducing the visibility of rain in images, the system comprising:
- a controller that:
- acquires a first image with an image acquisition device having one or more settings;
- detects rain in the acquired first image;
- adjusts the one or more settings of the image acquisition device to reduce the visibility of rain, wherein the one or more settings comprise at least one of:
- focal length, F-number, and exposure time;
- and
- acquires a second image with the image acquisition device using the adjusted settings.
A method for measuring rainfall using an image acquisition device, the method comprising:
- adjusting settings of the image acquisition device to enhance the visibility of rain, wherein the settings comprise at least one of:
- focal length, F-number, and exposure time;
- acquiring a plurality of images with the image acquisition device;
- and
- computing a measure of the rain rate based on counting the number and size of raindrops in each of the plurality of images.
Dependencies are inferred from the claim text.