Samsung Electronics Co., Ltd.

Pusan National University

Il-Kyu Eom

Yun-Je Oh

Dong-seek Park

Min-Kyu Park

Jae-Ho Kim

Min-Woo Lee

Sung-dae Cho

Hyun-Hee Park

Ji-hye Kim

Hyun-Meen Kang

A method and apparatus for estimating signal-dependent noise in a camera module are provided, in which an image is decomposed into high frequency components and low frequency components, a variance of noise in the image is estimated using the low frequency components, noise is eliminated from the high frequency components using the estimated noise variance, and the image is recovered using the noise-eliminated high frequency components and the low frequency components.

Apparatus and method for estimating signal-dependent noise in a camera module

Input image data is wavelet-transformed into wavelet transformed data. First, second and third quantization values respectively corresponding to the frequency variation, background brightness and edge state of the wavelet transformed data are determined. The wavelet transformed data is quantized by using a human visual quantization value for each region corresponding to the first, second and third quantization values. The quantized data is entropy-encoded to generate compressed image data.

Wavelet image compression/recovery apparatus and method using human

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Pusan, South Korea

Il-Kyu Eom