Digital Signal Processing Experiment (0)--one-dimensional sound signal processing and two-dimensional image processing

I. I/O of sound signal in MATLAB 1, read WAV file function

? y = Wavread ('filename'= wavread ('filename' ) = Wavread ('filename' = Wavread ('filename') , [N1 N2])

2. Write WAV file function

? wavwrite (Y,'filename')? Wavwrite (Y,fs,'filename')  )? Wavwrite (Y,fs,n,'filename')

3. Play sound function

Sound (Y,FS), sound (y), Sound (y,fs,bits)

Second, the image processing related MATLAB comes with the function 1, reads the Image:

The function Imread can read an image in any bit depth from any MATLAB supported image file format. The format is:

x=imread (' FILENAME. FMT ')%filename-The image file name%fmt-for the image format that needs to be read in

2. Image display

Imshow (gray); Displays grayscale image, Gray is a two-dimensional matrix imshow (RGB)  ; Displays a true color image, RGB is a three-dimensional matrix imshow (BW)   ; Displays a binary image, BW is a two-dimensional matrix

3. Image Preservation

Imwrite (I,' filename. file format '% file format: BMP, JPG, PCX, TIF.

3. Image format Conversion

Rgb2gray (' picture name ');        %RGB turns into grayscale IM2BW (' picture name ');           % gray to two-value image

Digital Signal Processing Experiment (0)--one-dimensional sound signal processing and two-dimensional image processing