Python images and their matrix data are converted to each other

Program

#CODING=GBK fromPILImportImageImportNumPy as NP#Import scipyImportMatplotlib.pyplot as PltdefImagetomatrix (filename):#Reading Picturesim =image.open (filename)#Show Pictures#im.show ()Width,height =Im.size im= Im.convert ("L") Data=im.getdata () data= Np.matrix (data,dtype='float')/255.0New_data=Np.reshape (data, (width,height))returnNew_data#new_im = Image.fromarray (new_data)## Show Pictures#new_im.show ()defmatrixtoimage (data): Data= data*255New_im=Image.fromarray (Data.astype (np.uint8))returnnew_im filename='lena.jpg'Data=imagetomatrix (filename)PrintData New_im=matrixtoimage (data) plt.imshow (data, CMap=plt.cm.gray, interpolation='Nearest') New_im.show () New_im.save ('lena_1.bmp')

Original picture

After reading

Python images and their matrix data are converted to each other