dwt2 decomposition of image

m doing dwt decomposition of a image using command- [cA1,cH1,cV1,cD1] = dwt2(X,'db1');

when i display w=[ cA1 cH1 cV1 cD1] my cA1 part is not looking like my original image as given here.. http://www.mathworks.in/help/wavelet/ref/dwt2.html

please help someone..

Answer 1

[Obuli Yuvaraj]

CA1 is not a image you have given. It is actually a plot of co-efficients after passing the image into a low pass filter

Answer 2

[mimi fcb]

s'il vous plait comment decoper une image en 4 coupe