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    • 5. 发明申请
    • Digital signal processing with improved mapping
    • 数字信号处理具有改进的映射
    • US20090092333A1
    • 2009-04-09
    • US10578389
    • 2004-11-10
    • Michael HobsonCharles McLachlan
    • Michael HobsonCharles McLachlan
    • G06K9/40
    • G06T5/00
    • A method of performing a signal enhancement operation on a digital input signal is described. The method produces a best estimate of a true signal which the digital input signal is assumed to represent. The method involves deriving a plurality of candidate mappings, each defining a mapping between the signal domain of the digital input signal and an alternative optimisation domain, each signal in the signal domain corresponding to a set of optimisation parameters in the optimisation domain. For each candidate mapping, an indicator of the quality of the candidate mapping is calculated an a set of optimisation parameters in the optimisation domain of the candidate mapping is generated, the set of optimisation parameters re resenting an enhanced signal in that domain. The highest-quality mapping is then selected in dependence on the calculated indicators, and the set of optimisation parameters generated for the selected mapping is selected. The selected mapping is applied to the selected set of optimisation parameters to produce an enhanced digital signal. The method finds application in a variety of signal processing fields including image processing, and is applicable for exmple, to image processing tasks such as image enhancement or image reconstruction.
    • 描述了对数字输入信号执行信号增强操作的方法。 该方法产生假定数字输入信号表示的真实信号的最佳估计。 该方法包括导出多个候选映射,每个候选映射定义数字输入信号的信号域与替代优化域之间的映射,信号域中的每个信号对应于优化域中的一组优化参数。 对于每个候选映射,计算候选映射的质量的指示符,生成候选映射的优化域中的一组优化参数,该优化参数集合重新生成该域中的增强信号。 然后根据计算的指标选择最高质量的映射,并且选择为所选映射生成的优化参数集合。 所选择的映射被应用于所选择的优化参数集合以产生增强的数字信号。 该方法在包括图像处理的各种信号处理领域中得到应用,并且适用于例如图像处理任务,例如图像增强或图像重建。