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1. 发明申请

WO2013049653A1 AUTOMATIC IMAGE SHARPENING 审中-公开
标题翻译：自动图像缩放
公开(公告)号：WO2013049653A1
公开(公告)日：2013-04-04
申请号：PCT/US2012/058034
申请日：2012-09-28
申请人： APPLE INC.
发明人： CRANDALL, Richard E. , KLIVINGTON, Jason Alexis , VAN DER MERWE, Rudolph
IPC分类号： G06T5/00
CPC分类号： G06T5/003
摘要： Systems, methods and computer program products are disclosed for automatic image sharpening. Automatic image sharpening techniques are disclosed that automatically bring a blurred image into focus. Techniques for reducing edge ringing in sharpened images are also disclosed. According to implementations, a computer-implemented method includes determining a normalized entropy of a first image, calculating a correlation target based on the normalized entropy, automatically determining a blur radius of a de-convolution kernel that causes a cosine of a first radial power spectrum of the kernel and a second radial power spectrum of a reconstruction of the first image to approximate the correlation target and generating a second image based on the blur radius.
摘要翻译：公开了用于自动图像锐化的系统，方法和计算机程序产品。公开了自动图像锐化技术，自动使模糊图像成为焦点。还公开了用于减少锐化图像中的边缘振铃的技术。根据实施方式，计算机实现的方法包括：确定第一图像的归一化熵，基于归一化熵计算相关目标，自动确定导致第一径向功率谱的余弦的去卷积核的模糊半径以及第一图像的重建的第二径向功率谱，以近似相关目标并基于模糊半径生成第二图像。

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