Single Level 2d Discrete Wavelet Transform Matlab Example code | Single Level 2d Wavelet Transform Code on Matlab

In below example to applying single level wavelet transform.

Wavelets are convert the signal into more sub bands like low frequency and high frequency. wavelets used in stenography and watermarking techniques.

>> input = imread('input.jpg');

>> imshow(input);

>>[LL,LH,HL,HH] = idwt2(input,'haar'); % here we use haar wavelet applying

then process and covert any one bands.then applying inverse operation,example as below

>>out_img = idwt2(LL,LH,HL,HH);

>>imshow(out_img );

Finally we construct new image.

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