Back to results
US 9,319,602 B2Granted
Method and apparatus for processing image
AssigneesIndustry-Academic Cooperation Foundation, Yonsei University, Hanwha Techwin Co., Ltd.
InventorsJeong-Ahn Lee, Min-seok Lee, Ji-yong Kwon, Moon-gi Kang
Life of this patent
Estimating the term…
Abstract
A method of processing an image includes: offsetting aliasing by analyzing frequency characteristics of at least one color channel and a NIR channel, of a MSFA pattern image; generating a high resolution base image; and offsetting an artifact from the high resolution base image by weighting the high resolution base image and a blur image, based on a pixel difference value between the blur image and the high resolution base image.
Claims17
A method of processing an image, the method comprising:
- offsetting aliasing by analyzing frequency characteristics of at least one color channel and a near-infrared (NIR) channel, of a multi-spectral filter array (MSFA) pattern image;
- generating a high resolution base image by amplifying resolutions of the at least one color channel and the NIR channel, from which the aliasing is removed, up to a resolution of a base image using a windowed-sinc function;
- and
- offsetting an artifact from the high resolution base image by weighting and combining the high resolution base image and a blur image obtained by blurring the high resolution base image, based on a pixel difference value between the blur image and the high resolution base image,
- wherein a cutoff frequency wc of the windowed-sinc function is set based on a tanh function using a local variance of the MSFA pattern image as a variable.
2 more elements
A method of processing an image, the method comprising:
- offsetting aliasing by analyzing frequency characteristics of at least one color channel and a near-infrared (NIR) channel, of a multi-spectral filter array (MSFA) pattern image, and combining the at least one color channel and the NIR channel such that phase characteristics of the at least one color channel and the NIR channel offset each other;
- generating a high resolution base image by amplifying resolutions of the at least one color channel and the NIR channel, from which the aliasing is removed, up to a resolution of a base image using a windowed-sinc function, wherein a cutoff frequency wc of the windowed-sinc function is adaptively set according to statistical characteristics of a local region obtained from the MSFA pattern image and is set based on a tan h function using a local variance of the MSFA pattern image as a variable;
- and
- offsetting an artifact of the high resolution base image by weighting and combining the high resolution base image and a blur image obtained by blurring the high resolution base image, based on a pixel difference value between the blur image and the high resolution base image.
1 more element
An apparatus for processing an image, the apparatus comprising:
- an aliasing offset unit configured to offset aliasing by analyzing frequency characteristics of at least one color channel and a near-infrared (NIR) channel, of a multi-spectral filter array (MSFA) pattern image;
- a high resolution base image generator configured to generate a high resolution base image by amplifying resolutions of the at least one color channel and the NIR channel from which the aliasing is removed, up to a resolution of a base image using a windowed-sinc function;
- and
- an artifact offset unit configured to offset an artifact from the high resolution base image by weighting and combining the high resolution base image and a blur image obtained by blurring the high resolution base image, based on a pixel difference value between the blur image and the high resolution base image,
- wherein a cutoff frequency wc of the windowed-sinc function is set based on a tan h function using a local variance of the MSFA pattern image as a variable,
- wherein the apparatus comprises at least one processor configured to implement the aliasing offset unit and the artifact offset unit.
3 more elements
An apparatus for processing an image, the apparatus comprising:
- an aliasing offset unit configured to offset aliasing by analyzing frequency characteristics of at least one color channel and a near-infrared (NIR) channel, of a multi-spectral filter array (MSFA) pattern image, and combining the at least one color channel and the NIR channel such that phase characteristics of the at least one color channel and the NIR channel offset each other;
- a high resolution base image generator configured to generate a high resolution base image by amplifying resolutions of the at least one color channel and the NIR channel, from which the aliasing is removed, up to a resolution of a base image using a windowed-sinc function, wherein a cutoff frequency wc of the windowed-sinc function is adaptively set according to statistical characteristics of a local region obtained from the MSFA pattern image and is set based on a tan h function using a local variance of the MSFA pattern image as a variable;
- and
- an artifact offset unit configured to offset an artifact of the high resolution base image by weighting and combining the high resolution base image and a blur image obtained by blurring the high resolution base image, based on a pixel difference value between the blur image and the high resolution base image.
1 more element
Dependencies are inferred from the claim text.