uncompress.imwdc | R Documentation |
An imwdc.object
is a run-length encoded object, essentially
has all zeroes removed and only non-zero elements stored. This function
undoes the compression.
## S3 method for class 'imwdc' uncompress(x, verbose=FALSE, ...)
x |
The object to uncompress |
verbose |
If TRUE then print out messages |
... |
Other arguments |
Description says all, inverse of compress.imwd
function.
The uncompressed imwd.object
.
G P Nason
imwd
, compress.imwd
data(lennon) # # Do 2D wavelet transform on lennon image # lwd <- imwd(lennon) # # Do threshold the wavelet coefficients, a lot of zeroes are present # lmdT <- threshold(lwd) # # What is the class of the thresholded object? # class(lmdT) #[1] "imwdc" # # note that the coefficients are stored efficiently in the imwdc class object # uncompress(lmdT) #Class 'imwd' : Discrete Image Wavelet Transform Object: #~~~~ : List with 30 components with names #nlevelsWT fl.dbase filter w0Lconstant bc type w0L1 w0L2 w0L3 w1L1 w1L2 #w1L3 w2L1 w2L2 w2L3 w3L1 w3L2 w3L3 w4L1 w4L2 w4L3 w5L1 w5L2 w5L3 w6L1 #w6L2 w6L3 w7L1 w7L2 w7L3 # #$ wNLx are LONG coefficient vectors ! # #summary(.): #---------- #UNcompressed image wavelet decomposition structure #Levels: 8 #Original image was 256 x 256 pixels. #Filter was: Daub cmpct on least asymm N=10 #Boundary handling: periodic
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