Image acquisition apparatus and method of acquiring images using a multispectral image sensor
AssigneeSamsung Electronics Co., Ltd.
InventorsSoongeun Jang, Woo-Shik Kim
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Abstract
An image acquisition apparatus may include a multispectral image sensor configured to acquire an image of at least one object in an environment in which at least one illumination source exists, through eight or more channels with minimum overlap between the channels, and a processor configured to estimate illumination spectral data of the acquired image by using channel signals corresponding to the eight or more channels, and perform lens shading correction on the acquired image, based on the estimated illumination spectral data.
Claims17
An image acquisition apparatus comprising:
- a multispectral image sensor configured to acquire an image of at least one object in an environment in which at least one illumination source exists, through eight or more channels;
- and
- a processor configured to:
- estimate illumination spectral data of the image by using channel signals corresponding to the eight or more channels;
- and
- perform lens shading correction on the image by generating a correction map for each of the eight or more channels through linear interpolation of correction data included in a correction table, and applying the lens shading correction to the image using the correction map,
- wherein the correction table comprises correction data for each of the eight or more channels, and the correction data comprise an offset and an incidence angle that correspond to the illumination spectral data.
An image acquisition apparatus comprising:
- a multispectral image sensor configured to acquire a first image of at least one object, in an environment in which at least one illumination source exists, through eight or more first channels;
- an image sensor configured to acquire, through fewer than four second channels, a second image of the at least one object in the environment in which the at least one illumination source exists;
- and
- a processor configured to:
- estimate illumination spectral data of the first image by using channel signals corresponding to the eight or more first channels;
- perform lens shading correction on the second image by generating a correction map for each of the eight or more channels through linear interpolation of correction data included in a correction table, and applying the lens shading correction to the image using the correction map,
- wherein the correction table comprises correction data for each of the eight or more channels, and the correction data comprise an offset and an incidence angle that correspond to the illumination spectral data.
A method of acquiring images, the method comprising:
- acquiring a first image of at least one object in an environment in which at least one illumination source exists, through eight or more first channels, by using a multispectral image sensor;
- estimating illumination spectral data of the first image by using channel signals corresponding to the eight or more first channels;
- and
- performing lens shading correction on the first image by generating a correction map for each of the first channels through linear interpolation of correction data included in a correction table, and applying the lens shading correction to the first image using the correction map,
- wherein the correction table comprises first correction data for each of the first channels, and the first correction data comprise an offset and an incidence angle that correspond to the illumination spectral data.
Dependencies are inferred from the claim text.