本实验要求开发一个计算哈尔小波的j-尺度二维DWT程序。并要求对图像 7.1进行如图7.8（a）所示的哈尔小波3-尺度二维DWT。同时也要求编写一个计算哈尔小波的二维逆DWT程序。-The experiment calls for the development of a calculation of the Haar wavelet j-scale two-dimensional DWT procedure. And called for the image in Figure 7.1 to

本程序是离散小波变化的一级小波分解，图像效果图为本人亲自所作！-DWT

Here, wavelets are used in Orthogonal frequency division multiplexing. Wavelets are small waves having amplitude increase starting zero and reduces back to zero. In conventional OFDM, IFFT is used at the transmitter side and FFT is used at receiver.