English-Vietnamese Dictionary
◊wavelet /'weivlit/
▫ danh từ
▪ sóng gợn lăn tăn
▪ làn sóng hơi quăn (tóc)
◦ hair in wavelets tóc hơi quăn làn sóng
English Dictionary
n : a small wave on the surface of a liquid [syn: {ripple}, {rippling},
English Computing Dictionary
A waveform that is bounded in both frequency and
duration. Wavelet tranforms provide an alternative to more
traditional {Fourier transform}s used for analysing waveforms,
e.g. sound.
The {Fourier transform} converts a signal into a continuous
series of {sine wave}s, each of which is of constant frequency
and amplitude and of infinite duration. In contrast, most
real-world signals (such as music or images) have a finite
duration and abrupt changes in frequency.
Wavelet transforms convert a signal into a series of wavelets.
In theory, signals processed by the wavelet transform can be
stored more efficiently than ones processed by Fourier
transform. Wavelets can also be constructed with rough edges,
to better approximate real-world signals.
For example, the United States Federal Bureau of Investigation
found that Fourier transforms proved inefficient for
approximating the whorls of fingerprints but a wavelet
transform resulted in crisper reconstructed images.
{SBG Austria (http://www.mat.sbg.ac.at/~uhl/wav.html)}
["Ten Lectures on Wavelets", Ingrid Daubechies].
French-Vietnamese Dictionary
▫ danh từ giống đực
▪ (từ hiếm; nghĩa ít dùng) thuyền chèo
German-Vietnamese Dictionary
◊das Wavelet (Funktion)
▪ {wavelet} sóng gợn lăn tăn, làn sóng hơi quăn