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    • 10. 发明授权
    • Dynamic adjustment of noise filter strengths for use with dynamic range enhancement of images
    • 噪声滤波器强度的动态调整,用于图像的动态范围增强
    • US08639050B2
    • 2014-01-28
    • US13276896
    • 2011-10-19
    • Shalini GuptaRajesh NarasimhaAziz Umit Batur
    • Shalini GuptaRajesh NarasimhaAziz Umit Batur
    • G06K9/40
    • G06T5/002G06T5/007G06T2207/20004G06T2207/20012
    • 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.
    • 执行用于图像的动态范围增强的噪声滤波器强度的动态调整,以通过动态地适应图像噪声分布来产生更好质量的图像。 在数字图像上执行全局和局部亮度和对比度增强(GLBCE)以形成增强图像。 GLBCE根据局部强度值将局部增益值应用于数字图像。 确定增强图像的GLBCE增益对强度曲线。 响应于GLBCE增益对强度曲线来调整一组噪声滤波器阈值以形成一组动态调整的噪声滤波器阈值。 增强图像使用一组动态调整的噪声滤波器阈值进行噪声滤波,以形成噪声滤波增强图像。