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This is the user sandbox of KCote. A user sandbox is a subpage of the user's user page. It serves as a testing spot and page development space for the user and is not an encyclopedia article. Create or edit your own sandbox here.

Other sandboxes: Main sandbox | Template sandbox

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Filter type	Kernel or mask	Example
Original Image	${\begin{bmatrix}0&0&0\\0&1&0\\0&0&0\end{bmatrix}}$
Spatial Lowpass	${\frac {1}{9}}\times {\begin{bmatrix}1&1&1\\1&1&1\\1&1&1\end{bmatrix}}$
Spatial Highpass	${\begin{bmatrix}0&-1&0\\-1&4&-1\\0&-1&0\end{bmatrix}}$
Fourier Representation	MATLAB Script: img=checkerboard(size); F=fft2(img); F=fftshift(F); imshow(log(1+abs(F)))
Fourier Lowpass
Fourier Highpass

References

Berger, Marcel (1987), Geometry I, Berlin: Springer, ISBN 3-540-11658-3

@@ Line 55: / Line 55: @@
 | '''Fourier Lowpass'''
 | [[File:Lowpass_Butterworth_Checkerboard.png]]
-| [File:Lowpass_FFT_Filtered_checkerboard.png]]
+| [[File:Lowpass_FFT_Filtered_checkerboard.png]]
 |-
 | '''Fourier Highpass'''
 | [[File:Highpass_Butterworth_Checkerboard.png]]
-| [[File:Highpass_FFT_Filtered_checkerboard.png|thumb|center| filtered with low pass butterworth ]]
+| [[File:Highpass_FFT_Filtered_checkerboard.png]]
 |-
 |}