Freitag, 25. November 2011

EE4206/EE5806 Digital Image Processing : the amplitude, magnitude and phase of an image

EE4206/EE5806 Digital Image Processing : the amplitude, magnitude and phase of an image

1. The components of the spectrum of the DFT determine the amplitudes of the sinusoids that combine to form the resulting image.

2. At any given frequency in the DFT of an image, a LARGE amplitude implies a greater prominence of a sinusoid of that frequency in the image.

3. Conversely, a SMALL amplitude implies that less of that sinusoid is present in the image.

4. The phase is a measure of displacement of the various sinusoids with respect to their origin.

5. Thus, while the magnitude of the 2-D DFT is an array whose components determine the intensities in the image, the corresponding phase is an array of angles tat carry much of the information about where discernible objects are located in the image.

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文章軌範読本 : 鄒守益撰,池田胤,山田準編, 東京:益友社,明26.5
[第1冊]正
http://kindai.ndl.go.jp/info:ndljp/pid/896371

[第2冊]続
http://kindai.ndl.go.jp/info:ndljp/pid/896372


文章軌範独修 鼇頭訓解 : 逸見義定編, 東京:松陽堂,明43.12
http://kindai.ndl.go.jp/info:ndljp/pid/896370


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