퓨리에트랜스폼응용에관한 PPT자료입니다.
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- 2009.12.09
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- 2009.12
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퓨리에트랜스폼응용에관한 PPT자료입니다.
목차
1. What is the Fourier Transform?
2. How to Reduce Noise in Audio
3. Example of Fourier Transform image
4. Fourier Transform Infrared Spectroscopy
본문내용
3. Example of Fourier Transform image
Fourier domain
Spatial domain
Fourier domain
Spatial domain
3. Example of Fourier Transform image
Most of the power in an image is concentrated in the low frequency components.
The image is in a form where low spatial frequencies are near the origin
As we move away from from the origin in the Fourier domain, we encounter higher and higher spatial frequencies.
High spatial frequencies maps into the detail in an image.
Detail in an image means structures such as edge where there is a sharp or fast spatial rate of change of image intensity.
Low frequency
4. Fourier Transform Infrared Spectroscopy
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The early-stage IR instrument is of the dispersive type,
which uses a prism or a grating monochromator
- The dispersive instrument is characteristic of a slow scanning.
A Fourier Transform Infrared (FTIR) spectrometer obtains infrared
spectra by first collecting an interferogram of a sample signal with an
interferometer
An FTIR spectrometer acquires and digitizes
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