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US 9,438,804 B2Granted
Device and method for removing distortion
AssigneeHanwha Techwin Co., Ltd.
InventorsYeon Geol Ryu, Sang Ji Park, Hwal Suk Lee
Life of this patent
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Abstract
Provided are a device and method for removing distortion in a photographed image. The method includes estimating a parameter set indicative of an amount of distortion in an input image by a local motion vector between a reference image and the input image, and reconstructing the input image by using the estimated parameter set.
Claims16
A device for removing distortion, the device comprising:
- a photographing unit configured to photograph a plurality of frames in succession by using a rolling shutter;
- a storage unit configured to store photographed images of the plurality of frames;
- a local motion vector generator configured to generate a local motion vector between a reference image and an input image among the photographed images;
- a parameter estimator configured to estimate a parameter set indicative of an amount of distortion in the input image in view of the reference image, based on the local motion vector;
- and
- an image reconstruction unit configured to generate a reconstructed image by using the estimated parameter set and information about the input image,
- wherein the parameter estimator is further configured to estimate the parameter set by selecting at least one scan line in the reference image and at least one corresponding line in the input image, and
- wherein the parameter set is a set of variables representing coordinates of a start point and an end point of the corresponding line which are located at a first curved boundary line and a second curve boundary line of the input image, respectively.
5 more elements
A method of removing distortion from an input image in a device for removing the distortion, the method comprising:
- storing a plurality of frames photographed in succession by a photographing unit by using a rolling shutter, in a storage unit;
- generating a local motion vector between a reference image and an input image among the photographed images in a local motion vector generator;
- estimating a parameter set to determine an amount of distortion in the input image in view of the reference image, based on the local motion vector, in the wobbling parameter estimator;
- and
- generating a reconstructed image by using the estimated parameter set and information about the input image in the image reconstruction unit,
- wherein the estimating the parameter set comprises selecting at least one scan line in the reference image and at least one corresponding line in the input image, and
- wherein the parameter set is a set of variables representing coordinates of a start point and an end point of the corresponding line which are located at a first curve boundary line and a second curved boundary line of the input image, respectively.
4 more elements
Dependencies are inferred from the claim text.