Hello Sir,

I am working compressive sensing on an image. I decomposed the image (256*256) using DWT and obtained the four sub bands of each 128 *128. Now I am taking the three high frequency sub bands of each (128*1)to be measured with Measurement matrix (100*128). So therefore i would get three resultant measured vectors.This is  Compression. Reconstruction: I would use the low frequency band(128*128) and the 3 high frequency band(128*1) using OMP to reconstruct the image.

Clarification: How to convert the one high frequency sub band (128 *128) into one measured vectors (128*1) ?

Please correct me if my understanding is wrong.