Use the coiflets and daubechies wavelet transform to reduce data noise for a simple experiment

Abstract EN

In this research, a simple experiment in the field of agriculture was studied, in terms of the effect of out-of-control noise as a result of several reasons, including the effect of environmental conditions on the observations of agricultural experiments, through the use of Discrete Wavelet transformation, specifically (The Coiflets transform of wavelength 1 to 2 and the Daubechies transform of wavelength 2 To 3) based on two levels of transform (J-4) and (J-5), and applying the hard threshold rules, soft and non-negative, and comparing the wavelet transformation methods using real data for an experiment with a size of 26 observations.

The application was carried out through a program in the language of MATLAB.

The researcher concluded that using the wavelet transform with the Suggested threshold reduced the noise of observations through the comparison criteria.