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Topic: Spatial frequency
Replies: 4   Last Post: Feb 22, 2011 4:56 AM

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Abder-Rahman

Posts: 123
Registered: 7/4/08
Re: Spatial frequency
Posted: Feb 22, 2011 3:55 AM
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"Wayne King" <wmkingty@gmail.com> wrote in message <ijtmh1$2na$1@fred.mathworks.com>...
> "Abder-Rahman" <abder.rahman.ali@gmail.com> wrote in message <ijtdbi$k8k$1@fred.mathworks.com>...
> > In the "Digital Image Processing: Principles and Applications" book, it mentions the following relating to "Spatial frequence":
> >
> > All images contain details, some fine details and some coarse details. These details are made up of brightness transitions that cycle from dark to light and back to dark. The rate at which brightness cycle is the spatial frequency . The higher the cycle rate, the higher the spatial frequency.
> >
> > Can you explain this paragraph especially "Cycle rate"? And, if there is an example, this will be much helpful.
> >
> > Thanks.

>
> Hi, It's the same as temporal frequency except that you have a wave oscillating in space. The cycle rate here is just the reciprocal of the spatial period. The higher (faster) the cycle rate, the shorter the spatial period between values that represent light and dark and therefore the higher the spatial frequency.
>
> Wayne


Thanks for your reply. Is it possible to explain it in a more simpler fashion?



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