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Someone added {{dubious}} to the last section. That template expands to "see talk page" but it was empty when I got here. Someone with a knowledge of OCaml should confirm or deny the assertion that the OCaml code is not doing the right thing. Note that the OCaml code also appears as an example on
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According to
Szeliski Book, chapter 3.5.4 wavelets produce one image that contains strong influence of vertical edges, and gradients, another in horizontal features and the last one in less frequent mixed derivatives, clearly the image has this three characteristics clearly splitted. I think that
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It would be helpful to have a simple diagram for IDWT, just like the existing diagrams for DWT. I came looking for hints on how to combine the different components back into the original image, but I was unable to find any. In the end, I found a nice diagram
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The university of bath has a selection of wavelet descriptions which I think would be interesting. Unfortunately, the use of them is not described well (at all). What do other people think about putting in a link?
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The OCaml code is pretty ugly and obscure, I reckon its causing more harm by being distracting than good, especially seeing as this is a math-based article, where pseudocode would be the
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573:"the second and third waves are translations of each other, corresponding to being 90° out of phase, like cosine and sine, of which these are discrete versions"
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The equations in this article are all discrete time, while the equations for discrete wavelets in the wavelet article are all continous time.
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and learned that I need to process each of the components with a filter, then sum the results together. This knowledge can also be found on
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Usually the opposite denotations are used (Mallat, Daubechies): G denotes high-pass filter and H stands for a low-pass one.
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appropriate form of representation. If you feel I am in error in deleting it, please give justification for reverting. --
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on the state of the wavelet articles. Nothing major has changed about this. -- This page as it is should be named „
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The following statement is correct for the removed matrix but not for the current. Or am I misstaken?
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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on
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page, so if it (the OCaml code) turns out to be wrong, it should be changed there too. --
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It's either a mistake or a bad formulation, either cases need correction.
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http://fourier.eng.hmc.edu/e161/lectures/figures/wavelet_filterbank.gif
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Lacking information about
Inverse Discrete Wavelet Transform
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that photo description should include this information
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It's stated there that the basis of DFT in 4D-case is:
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
