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This paper presents a new technique to estimate diagnostic features in multilead electrocardiogram (MECG) signal. The technique uses the eigen analysis of the significant sub-band matrices of analyzed MECG and synthetic MECG for evaluation of features. The sub-band matrices are obtained using the multiresolution analysis of MECG. For each of the significant sub-band matrix, the inter-sample eigen...
The diagnostic features of retinal images undergo changes in the course of processing such as for storage, retrieval and transmission. The conventional mean square error and peak signal to noise ratio have limitations in quantifying these local distortions. In this work, a novel wavelet weighted distortion measure (WWDM) is proposed for accurate quantification of diagnostic information loss. The wavelet...
This paper presents a simple method to assess the quality of compressed retinal images. It is based on the idea that the retinal image should possess some common features which helps to define the quality of the image. Retinal blood vessels are important diagnostic features in ophthalmological images. Changes in retinal vessel structure helps in detecting the Diabetic Retinopathy(DR). The 2-D discrete...
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