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Cardiogram recordings include numerous noncardiac containments, which overlap with the cardiac components in the frequency domain. Despite the rich literature in ECG denoising field, there are still noise left in the ECG. Useful information can not be extracted from such ECG. Therefore, the detection ECG validity algorithm was proposed based on wavelet transform. First, signals were preprocessed by...
Contourlet has shown its charming performance in image processing. The multi-resolution and multi-direction characteristics ensure the transform a good ability in handling the abundant texture information in natural images. However, the contourlet is not shift-invariant because of the subsampled filter structure. Thus, the contourlet will cause the visual artifact in image denoising applications....
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