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Non-linear adaptive image filter for filtering noise such as blocking artifacts
Non-linear adaptive image filter for filtering noise such as blocking artifacts
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机译:非线性自适应图像滤波器,用于滤除诸如块状伪影之类的噪声
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摘要
A filter reduces artifacts, such as grid noise and staircase noise, in block-coded digital images with image block boundaries. The type of filtering is determined after an estimation of the image global metrics and local metrics. For areas of the image near grid noise, the filter performs low pass filtering. For image fine details, such as edges and texture, no filtering is performed so that masking is avoided. The filter operates in intra-field mode and uses a fuzzy logic process, pixel deltas, and dual ramp generators to determine the horizontal and vertical length of a processing window surrounding an image block boundary.
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