Hello
I am working on algorithm for texture analysis project. I got to a point and very much stuck in it. what I did was reading an image and decompose it into 4 bands with haar wavelet filter, then I am stuck.. I want to insert columns of zeros between successive columns of the images, convolve the rows with the corresponding 1-D haar filter, insert rows of zeros between rows of the resulting image, and convolve the columns with another 1-D haar filter..
In wavelet toolbox there is a command line for extending an image let us assume we have the following matrix
x=[1 2 3;4 5 6;7 8 9]
y= wextend('ac','zpd',x,2)
y =
0 0 1 2 3 0 0
0 0 4 5 6 0 0
0 0 7 8 9 0 0
you can see clearly the extension was in edges. I read the tutorial MathWorks for this command can you illustrate it much more? can I control the extension location to be between successive columns or rows? if it doesn't work is there other way to solve this problem? please help me and thank you.
