Invention Grant
US08639050B2 Dynamic adjustment of noise filter strengths for use with dynamic range enhancement of images 有权
噪声滤波器强度的动态调整,用于图像的动态范围增强

Dynamic adjustment of noise filter strengths for use with dynamic range enhancement of images
Abstract:
Dynamic adjustment of noise filter strengths for use with dynamic range enhancement of images is performed to produce better quality images by adapting dynamically to the image noise profile. Global and local brightness and contrast enhancement (GLBCE) is performed on a digital image to form an enhanced image. The GLBCE applies local gain values to the digital image based on local intensity values. A GLBCE gain versus intensity curve is determined for the enhanced image. A set of noise filter thresholds is adjusted in response to the GLBCE gain versus intensity curve to form a set of dynamically adjusted noise filter thresholds. The enhanced image is noise filtered using the set of dynamically adjusted noise filter thresholds to form a noise filtered enhanced image.
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