Invention Grant
US07652788B2 Apparatus, method, mobile station and computer program product for noise estimation, modeling and filtering of a digital image
有权
用于噪声估计，数字图像建模和滤波的装置，方法，移动台和计算机程序产品
- Patent Title: Apparatus, method, mobile station and computer program product for noise estimation, modeling and filtering of a digital image
- Patent Title (中): 用于噪声估计，数字图像建模和滤波的装置，方法，移动台和计算机程序产品
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Application No.: US11519722Application Date: 2006-09-11
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Publication No.: US07652788B2Publication Date: 2010-01-26
- Inventor: Alessandro Foi , Vladimir Katkovnik , Dmitriy Paliy , Karen Egiazarian , Mejdi Trimeche , Sakari Alenius , Radu Bilcu , Markku Vehvilainen
- Applicant: Alessandro Foi , Vladimir Katkovnik , Dmitriy Paliy , Karen Egiazarian , Mejdi Trimeche , Sakari Alenius , Radu Bilcu , Markku Vehvilainen
- Applicant Address: FI Espoo
- Assignee: Nokia Corporation
- Current Assignee: Nokia Corporation
- Current Assignee Address: FI Espoo
- Agency: Alston & Bird LLP
- Main IPC: H04N1/409
- IPC: H04N1/409 ; H04N1/58 ; G06T5/50 ; G06K9/40
Abstract:
An apparatus, method, mobile station and computer program product are provided for filtering noise from a digital signal. In particular, a signal-dependent noise model is used that provides the pointwise (or pixelwise) standard deviation of the temporal noise of raw data outputted from a digital imaging sensor as a function of the image intensity. In addition, unlike conventional noise models, the standard deviation of the noise (σ) is a parameterized function, where the parameters are key characteristics of the digital imaging sensor. These parameters may include, for example, the pedestal level (p), the quantum efficiency (q), and the analogue gain (α) associated with the digital imaging sensor.
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