convertraw.py

import numpy as np
import matplotlib.pyplot as plt
import scipy.misc
import png
#import pil
import matplotlib.image as mpimg


def write_pgm(image, filename):
    """ Write grayscale image in PGM format to file.
    """

    height, width = image.shape
    maxval = 65536 #= image.max()
    with open(filename, 'w') as f:
        f.write('P5 {} {} {}\n'.format(width, height, maxval))
        image.tofile(f)


fnames = [
        'CC_A',
        'CC_CWF',
        'CC_D65',
        'CC_HOR',
        'CC_TL84',
        'FF_A',
        'FF_CWF',
        'FF_D65',
        'FF_HOR',
        'FF_TL84',
        'dark'
        ]

pathname = 'd:/Downloads/'
dt = np.dtype('uint16') 
width = 4056
height = 3040



for f in fnames:
    infile = pathname+f+'_unpacked.raw'
    x=np.fromfile(infile,dtype=dt).reshape ((height,width))
    print (x.max())
    if isPNG:
        outfile = pathname+f+'.png'
        with open(outfile, 'wb') as fout:
            writer = png.Writer(width=x.shape[1], height=x.shape[0], bitdepth=16, greyscale=True)
            zgray2list = x.tolist()
            writer.write(fout, zgray2list)

    else:
        outfile = pathname+f+'.pgm'
        write_pgm(x,outfile)