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A comment on What is the concept underlying image processing?. Parent comment

Re:What is the concept underlying image processing? by jonmrodriguez on Monday July 29, 2013 @09:09AM (#6120801)
It's great content, relevant to our readership, and it's new (dated July 27, 2013).

It's a cool "aha! moment" when you realize that using Look-Up Tables you can implement any Single-Point image transformation entirely using array lookup operations (no if statements or nonlinear math).

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Re:What is the concept underlying image processing? by OMBUG on Monday July 29, 2013 @09:38AM (#6120993)
To be fair you can implement any function over a finite domain using a sufficiently large lookup table.

The OP seems weird - it's clearly a beginner asking, but the answers assume an understanding of spatial frequency and Fourier transforms. I think it would be more intuitive to explain in terms of convolutions with small kernels.

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Re:What is the concept underlying image processing? by theoh on Monday July 29, 2013 @12:25PM (#6122071)
Really? For my money cool would be something like http://www.graficaobscura.com/interp/
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Re:What is the concept underlying image processing? by GrantS on Monday July 29, 2013 @12:42PM (#6122174)
That's great, both conceptually and from an ease-of-implementation perspective. Somehow I've never encountered that work, thanks for pointing it out!
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Re:What is the concept underlying image processing? by DougWebb on Monday July 29, 2013 @09:13AM (#6120826)
You need the if statements and nonlinear math to create the look-up tables.
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Re:What is the concept underlying image processing? by enigmoid on Monday July 29, 2013 @09:19AM (#6120861)
Not to create the lookup table in the example.

And I love reading about applications of linear algebra like this. Makes me want to write my own image processing algorithms as practice.

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