MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guida Utente Pagina 238

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8 Example Applications
10 The 2-D DCT b lock takes the two-dimensional DCT of each submatrix. This
process p uts m ost of the energy in the image into the upper left corner of
the resulting matrix. Use the default parameters.
11 Use the Selector block to extract the upper left corner of the submatrix.
Set the block parameters as follows:
Number of input dimensions =
2
Index mode = Zero-based
1
In dex Option =
Starting index (dialog)
In dex = 0
Output Size = 4
2
In dex Option =
Starting index (dialog)
In dex = 0
Output Size = 4
8-16
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