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A multi-scale edge detection method in the empirical mode decomposition (EMD) domain using the consistent EMD method to decompose the reference noise to adaptively estimate the noise threshold is proposed to detect the edges of noisy signals with different signal to noise ratios. The new algorithm first calculates the slope of the EMD residuals in scales. Second, it eliminates the noise in the slope...
The software platforms of new-style gas chromatography-mass spectrometers have added the analysis fuction of three-dimensional mass spectrogram (3-D MS). In order to add this fuction in the original software platforms, this paper designs the construction method of 3-D MS. We preprocess the raw date through threshold measuring, data smoothing and peak identifying, then we demarcate the mass to charge...
Image edge detection plays an important role in the image processing, On the basis of studying mathematical morphology and morphological edge detection operator in the field of application of edge detection in depth and integrating morphological expansion and corrosion, an amended edge detection operator was proposed and used to detect the image edge. Then change the edge elements structure and scale...
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